Correct selection and replacement of the thermostat on Priora. How to change a Priora thermostat 16 valves

A car thermostat for Lada Priora is a very small part that makes a big contribution to maintaining the temperature of the car. No matter how hot the car engine gets, its goal is to reduce the temperature by circulating fluid. The price of a standard thermostat is not high; as a rule, it costs around 500+ rubles. Replacing the thermostat of a Lada Priora car is a mandatory procedure if the car gets hot. In this case, it is necessary to change the thermostat, otherwise the engine will overheat. The part has analogues, but the standard part is the most effective. The Prior has 16 valves, replacement is a little more difficult, due to the fact that it is difficult to get to the antifreeze drain cap. The thermostat of the Priora car saves the engine from overheating. The part comes in 2 types: 1 - opens at a temperature of 92 degrees, 2 - at 95.

The thermostat on the Priora is a very simple device - what is most often damaged is what is inside: the cylindrical sensitive element. It is filled with a wax-based substance and therefore takes the ambient temperature well. The cylinder is surrounded by a spring, which is attached to a valve that tightly separates the small and large circles of circulation of the cooling system. When the material in the cylinder warms up to engine operating temperature, the spring expands and “pushes” the valve out. But this does not happen immediately: the valve extends fully only at a temperature of 103 degrees Celsius.

When the cooling effect of the liquid is achieved, the temperature (already reduced) is transferred to the filling of the cylinder, after which the spring is slowly compressed and the valve moves down. Thanks to the funnel effect, the coolant “drains” faster, and its volume in a small cycle remains unchanged - this is how the cooling system works.

The thermostat on the Priora is installed at the factory with the expectation that the engine will operate exclusively within the maximum permissible temperature. Its design is such that the thermostat (or rather, its valve) is designed to open at a temperature of about 98 degrees Celsius. An open valve provides a path for coolant into the radiator so that it cools even more - to an acceptable temperature - and circulates again, only this time in a large circle.

The factory thermostat of Lada Priora looks like this

What is a thermostat on Priora

The thermostat on the Priora is the main sensitive component of the car's cooling system. In a Lada Priora car, the thermostat is located between the engine and the radiator. Despite its small size, about 5 cm in diameter, it has two valves: bypass and main.

Replacing the thermostat on a Priora usually becomes necessary when the main valve malfunctions. It has a cylinder made of heat-sensitive material with a wax ball and rod inside. When heated above 82 degrees Celsius, the wax melts and expands, pushing the rod out. Thus the valve opens. And vice versa, when wax hardens, it decreases in volume. The valve closes. For a Priora car, the thermostat in the photo is shown in section. Its internal structure is shown.

The uninterrupted operation of the thermostat on the Priora keeps the engine temperature at a normal operating level. When the engine warms up, the Priora thermostat valve is closed, the opening temperature of which is 90-95 degrees. Accordingly, coolant does not flow to the radiator. The temperature in the system increases faster, engine wear and harmful emissions into the atmosphere are reduced, and your time and fuel are saved.

What is a thermostat for?

The car's thermostat serves to maintain normal operating temperature of the engine and protect it from overheating. Without it, the car would overheat and would not allow the interior to be heated. Also, negative temperatures would have a bad effect on the engine, leading to various malfunctions and increased fuel consumption.

The main purpose of the thermostat

Basically, the diameter of this device is no more than 5 cm. It is located between the radiator and the car engine and can be in a separate housing or built into the cylinder head. The main purpose is to maintain normal operating temperature of the engine. This happens as follows: until the engine temperature reaches 95 degrees Celsius, this device blocks the supply of coolant, but as soon as the critical point is reached, the device instantly opens the valves and the engine is cooled.

Thermostatic mechanisms regulate the temperature of the motor and, by helping it warm up faster, increase its service life, which will save the family budget. In addition, they perform very important functions in environmental terms, as they reduce the emission of very harmful exhaust gases into the atmosphere. Breakage or incorrect operation of such a part is undesirable, which means we must be able to identify the problem in time and fix it.

Thermostat operating principle

The thermostat consists of a housing and a thermoelement. The main role is played by the thermoelement. The thermocouple is built into the housing and covers one of the holes in the thermostat cover. When the temperature reaches 85 degrees, the thermoelement opens.

Direct work on the car is that when the thermoelement is closed, the coolant circulates in a small circle, bypassing the engine cooling radiator; as soon as the coolant temperature reaches 85 degrees, the thermoelement opens and coolant circulation begins in a large circle through the radiator.

So during the entire operation of the engine, the thermoelement opens and closes a huge number of times.

Thermostat operating principle

So during the entire operation of the engine, the thermoelement opens and closes a huge number of times.

Checking the Thermostat

Most often, drivers notice a thermostat malfunction during the cold season. Since a car engine at low temperatures cannot heat up to operating temperature. Based on the fact that the engine temperature is below normal, the heater will not be able to heat the interior to a comfortable temperature.

The thermostat is checked on a cold engine.

We start the engine and touch the lower radiator pipe. It should be cold, not warm, but cold is very important. When the temperature reaches 85 degrees, the lower pipe should become hot. If the check on your car shows the opposite, then the thermostat is most likely faulty.

The thermostat will also be faulty if, when starting the engine, after some time the lower radiator hose becomes warm, then most likely the thermocouple is jammed or does not completely close the large circuit.

How to check the thermostat without removing it from the car? Signs of a bad thermostat

The thermostat is a small part in the mechanism of an internal combustion engine that is responsible for the operation of the cooling system. When this component stops working, thick accumulations of steam begin to emerge from under the hood of the vehicle, a similar picture can often be seen in various films and TV series.

The thermostat mechanically transfers flows of cooled liquid at different temperatures through the cooling system. It works in a large circle when the engine overheats - passing through the radiator, and in a small circle when the engine is cold - bypassing it. If this part does not work correctly, then in the cold season the stove freezes and it is impossible to warm up the car interior. There is a thermostat in both a used car and a new one, if they use a closed version of the liquid cooling system with forced circulation of liquid at a low temperature. The principle of operation of the part is identical for all cars, regardless of the country of manufacture.

Diagnostic methods

With a properly functioning thermostat, the car engine heats up to operating temperature in 5-10 minutes at an ambient temperature of at least 0 degrees. If warming up takes longer, then it’s quite easy to verify that the thermostat is the culprit. To do this you need:

Start the engine and wait until the coolant temperature reading on the instrument panel is around 85 degrees.
Open the hood and find the pipe leading from the thermostat to the radiator. It should have approximately the same temperature as the rest of the cooling system pipes. If it is significantly colder, the valve is either closed or not fully open. This is a serious reason to replace the Lada-Priora thermostat.

Checking functionality manually

To make sure that the thermostat is the cause of engine overheating, do the following:

Start the engine and wait until it warms up to operating values (85-90 degrees).
Open the hood of the car and touch the radiator pipe. If its surface is warm or hot, this indicates problems with the cooling system. The fact is that a working thermostat begins to supply coolant in a large circle after the internal combustion engine heats up above 95 degrees. This was done in order to ensure the fastest heating of the engine to operating mode. After the valve begins to operate, the lower pipe heats up.
If you notice that when the internal combustion engine heats up slightly, the pipe heats up, the reason is a faulty thermostat.
Please note that in some cases the movement of cooling fluid is hampered by a faulty water pump, which is also a good idea to check.

Causes of malfunction

There can be any number of reasons why a thermostat fails, but the main, most common ones are:

scale;
corrosion;
dirt;
poor quality coolant;
spent resource.

Most often, the listed factors lead to the fact that not the entire thermostat fails, but its sensitive element, which is a sealed cylinder filled with a special wax-based mixture with a movable rod.

When heated, the mixture melts and expands, pushing the rod forward. This, in turn, pushes the valve, which closes and opens the pipeline. Corrosion, scale and dirt, settling on the moving parts of the thermostat (rod, valve), interfere with their normal operation, or even immobilize them.

What reasons can cause a malfunction in the thermostat?

The main reasons why a thermostat fails are pollutants. The latter get inside the cooling system during vehicle operation. It could be:

corrosion of metal;
various deposits and scale that are deposited on the inner walls of the thermoelement;
debris and dirt.

Over time, the amount of contaminants accumulates, which becomes an obstacle to the movement of the rod inside the cooling system.

To prevent this situation, you should monitor the quality of the antifreeze that is poured into the cooling system.

Signs of trouble

Even if you do not carry out diagnostics, you can suspect the presence of thermostat malfunctions during the operation of the car. They will manifest themselves as follows:

The engine takes a long time to warm up.
Heating the coolant to a temperature of 130 degrees and above.
The sensor shows the temperature during a stop is significantly higher than when driving at speed.
The lower thermostat pipe begins to warm up immediately after the engine starts. This indicates that the valve is not closing completely.
The lower pipe is cold when the temperature on the instrument panel approaches a hundred.

The last point reports a closed valve, except in the case when the cooling system fan is faulty, which does not require replacing the Priora thermostat.

Possible problems

Over time, the thermostat of a Priora car wears out and can be damaged. Since every time the car is started it is put into operation, the more often the car is in working condition, the more it is susceptible to breakdowns. As a result, it stops changing position and, in a broken state, takes either an open or closed position. This can be affected by mechanical damage, as well as loss of thermostat properties when the device ceases to control the temperature. It is possible that the valve will not close completely due to damage to the rubber gaskets. It is dangerous to operate such a car, so if it breaks down, it is recommended to replace the thermostat on the Priora with a new one.

The Lada Priora has 16 valves; when the device is not working, the following symptoms are noticeable on the car:

When the internal combustion engine constantly overheats, although the device is operating in normal mode, it is possible that the coolant is not passing through the radiator.

Due to coolant leakage, the device stops responding to temperature changes, and because of this, the engine will take much longer to warm up. If coolant gets on the element responsible for temperature control, the valve will open a little earlier and because of this there will be an oversupply. Thus, the cooling system may break down, and the engine will operate at higher speeds.

If the internal combustion engine starts to stall, then due to constant vibrations the coolant can come out and because of this the valve stops functioning.

Additional Tips

Before replacing the Priora thermostat, it makes sense to check the new one for functionality. To do this, the part is placed in a pan of water.

As you gradually heat the water, you need to watch how the valve opens. If it is completely open at a temperature close to boiling, then it can be installed on the machine.

After replacement, remember to add antifreeze to the cooling system to the operating level indicated on the expansion tank. If a certain amount of coolant was spilled during draining, then you need to add the same color as the main fluid. Antifreezes of different colors do not mix.

In order for the Lada Priora 16 valves, and any other car model, to work properly and not let the driver down on the road, the car owner must monitor the technical serviceability of the car and promptly repair any breakdowns. If during the next check an antifreeze leak is detected, then you need to first check the thermostat, which will most likely have to be removed and replaced. Replacing a thermostat on a Priora is not a difficult task, so every car owner can cope with such a task, if, of course, this process is carried out according to the instructions provided by professionals in their field.

How to solve a problem

Depending on the terrain in which the car is operated, it is necessary to choose which device is best to install on the Priora. If the installed device is suitable according to its parameters and characteristics, but the coolant exceeds the permissible values, then it is recommended to replace it with a similar spare part that has a higher temperature threshold for opening the valve. This approach is recommended for those who drive in mountainous areas or forests.

It happens that antifreeze stagnates in one place and this causes a plug to form. In this case, it is necessary to break through it. This can be done using a regular screwdriver.

If the valve opens prematurely, it is possible that the spring on the thermostat is weakened. In this case, you can tighten it or replace it with a new one.

When warming up the engine for a long time, it is best to check the rubber bands first. It is possible that the device is locked in the wrong position and will need to be secured in the correct position to normalize the air valve.

If the valve functions normally and opens on time, but the engine constantly overheats, then you first need to check the antifreeze level, as well as the possibility of plugging due to stagnation. It is possible that the radiator has stopped performing its functional duties and will need to be replaced. The problem may also lie in the fan or cooling pump. It is necessary to check their functionality and replace if necessary. The last thing that can interfere with good cooling is a dirty system. In this case, it is necessary to clean it.

Weight matters

A car disk is a simple flywheel mounted on a hub. To set it in motion, you need to expend a certain amount of energy, the source of which is fuel. And the greater the mass of the wheel, the more fuel will be required to spin it. But it is much more difficult to stop the wheel when its rotation speed is very high. At that moment, a very large load is placed on the braking system. Therefore, not only the comfort and controllability of the car, but also the safety of passengers in the cabin depends on the quality of the disc and the materials used to make it.

Modern wheels are made of steel and various light alloys, which give them a number of advantages:

Welded steel disc. This is a familiar stamped version that boasts a low price and durability. It is these discs that have the heaviest weight, are easily deformed and are more susceptible to corrosion than others. But with all their shortcomings, they are not so bad - if after falling into a hole the disk is dented, this can be quickly corrected at a service station.
Alloy wheels (cast and forged). They have much lighter weight, high anti-corrosion and strength properties and many design solutions. But they are already much more expensive. When subjected to strong impacts, alloy wheels do not bend like steel wheels, but rather crack. Forged ones can withstand the strongest blows and are practically impossible to bend.

DIY replacement

Before doing the work, you need to understand whether there are any differences in replacing the thermostat on a Priora with 16 valves from the same model with 8 valves. Despite the difference in power, the differences in engines are not significant. Both are based on the same cylinder block. Only the cylinder head and the gas distribution mechanism differ, and the unit itself, in which the division into small and large circles occurs, is the same. This means that replacing the thermostat on a Priora 16 cl is no different, except that you need to remove the decorative plastic cover covering the engine.

To change the thermostat you need:

Drain antifreeze from the radiator. To do this, unscrew the tap at the bottom and also remove the plug from the expansion tank. The container for draining must be prepared at least 5 liters.
Unscrew the clamp of the pipe going to the radiator and pull it off. A little more coolant will leak out, so you need to place a bottle to drain it.
Remove the opposite pipe in the same way.
Remove the 3 thermostat bolts using a hex wrench.
Move the rubber sealing ring from the old thermostat to the new one, lubricate the adjacent surfaces with silicone sealant.
Install the new thermostat and tighten the bolts.
Place the pipes in place, having previously lubricated the seats on the thermostat with silicone sealant.

Replacement

1. Place the car on a pit or overpass. Raise the hood and open the expansion tank cap.

2.Climb under the car and remove the engine protection. On the cylinder block we find a plug for draining the coolant in the form of a 13 bolt, it is located in the same place as on the 8-valve engine, well, due to inaccessibility from above, it is impossible to crawl up from above.

Replacing the thermostat

To replace, you will need to drain the coolant.

Care must be taken to carry out work only on a cold engine to avoid burns.

Replacement Tool:

Head or key set to “13”;
Coolant 5 l;
Clamps 50 mm;
Hexagon on "6"
Screwdriver “+” and “-”

Work process

We remove the air filter box by unscrewing the clamp from the MAF sensor with a screwdriver and removing the chip from it. The box is held on by rubber clamps; in order for the box to be removed, you must forcefully pull it up.

Drain the coolant. To do this, use your head or a key set to “13” to unscrew the plug on the cylinder block and drain the liquid into a container.

You can use old fluid only if it is clean; it is not recommended to refill dirty coolant.

Loosen the front clamp of the large circle pipe on the thermostat cover (lower pipe from the radiator) and remove it.

Loosen the rear clamp of the pipe on the thermostat cover (from the water pump tube) and remove it.

Unscrew the 3 bolts securing the thermostat cover to the body with a hexagon to “6” and remove it.

Install the new thermostat cover in reverse order.

If the pipes are still old, it is recommended to use sealant to avoid coolant leaks.

After assembly, fill in the coolant, start the engine and let the car run for a few minutes, after which we check the coolant level again. Top up if necessary.

The thermostat replacement process is complete, there is nothing complicated about it.

Modification of the VAZ 2110 thermostat

If you decide to replace the thermostat with a new one, then at the same time you can immediately modify it

Modifying the thermostat has its pros and cons. In this article we will focus on how you can remake the VAZ 2110 thermostat yourself, and what you will need for this. Why are cars with a 6-hole thermostat warmer? They are warmer not because a sixth fitting has appeared there, but because the bypass channel has been reduced. And the new fitting serves to get rid of the constantly leaking heater return tee.

Comparison of bypass channels of a 6-hole thermostat - 11mm (left) and 5-hole - 16mm (right)

What does the bypass affect? Through the bypass channel, the coolant circulates in a small circle. And the smaller the diameter of the bypass channel, the more coolant flows through the heater. Since additional resistance is created when coolant flows in a small circle bypassing the stove. That is, by reducing the diameter of the bypass you increase the flow through the stove, that is, the car interior will be warmer.

Reducing the bypass channel for a 5-hole thermostat:

I would like to note right away that when the bypass channel in a 5-hole thermostat (TC) is narrowed, problems may arise: Problems associated with washing the thermoelement. That is, if in a 6-hole thermoelement the bypass coolant and the coolant of the outlet (cold) pipe of the stove are washed, then in a 5-hole thermocouple only the bypass coolant is washed. In order to reduce the bypass to the required value, you can cut a plate out of an aluminum plate. The plate must fit exactly inside , as shown in the figure. Next, the plate needs to be secured; for this you can use cold welding or rivets. Make sure that the rivets do not interfere with the closure of the small circle. Then we drill a new hole in the plate. Another fastening option.

Reducing the bypass channel for a 6-hole thermostat

Unlike the 5-hole TS, in the 6-hole TS I don’t see a single problem with narrowing the bypass! Because In addition to the bypass coolant, coolant from the heater also gets to the thermoelement. The technology for reducing the channel bypass is exactly the same here, except that we connect the heater return to the vehicle. For this fitting: What will be the difference after reducing the bypass? The difference will be that the temperature of the coolant reaching the thermoelement will depend on the percentage of coolant passing through the heater and passing directly through the bypass. And also from the drop in t in the heater radiator. If the drop in t in the heater radiator depends to a greater extent on the load on the radiator - the temperature of the outside air and the fan speed, respectively, then the percentage of the flows in question depends precisely on the diameter of the bypass. Accordingly, the stronger we If we reduce the bypass, the stronger will be the dependence of the engine t on the load on the stove.

Replacing the thermostat on a Priora: instructions for the driver

“Lada-Priora” is one of the cars of the “VAZ” family. And as a typical representative, he is not without some shortcomings that arise at the most inopportune moment. Insufficient engine heating in winter or overheating in summer heat while stuck in a traffic jam - all this can be caused by a malfunction of the cooling system.

Replacing the thermostat on a Priora is an easy task for any motorist.

Purpose of the thermostat

This small detail makes a huge difference. It is the thermostat that allows the engine to operate at the optimal temperature. Being part of the cooling system, it acts as a valve that does not allow coolant to circulate in a large circle (through the radiator) until it reaches operating temperature.

The cooling system has 2 circuits that are connected to each other through a thermostat. A small circle allows you to warm up the engine as quickly as possible in cold weather. Until the coolant temperature rises to 70-75 degrees, the thermostat is completely closed. It begins to open slightly in this thermal gap and is fully open when it reaches 95 degrees.

As the valve opens, hot coolant is mixed into a large circle, where it passes through the radiator and releases some of the heat into the atmosphere. If the operating mode is violated, the Priora thermostat should be replaced.

Reasons for failure

The operation of the thermostat largely depends on how well it is assembled. If a high-quality part is installed on the car, and the owner uses good antifreeze and changes it in a timely manner, then the thermostat can last the entire life of the car.

Unfortunately, the coolant does not always comply with GOST, and parts supplied to the conveyor undergo quality control. All this leads to the fact that replacing the thermostat on a Priora becomes inevitable.

The main reasons for failure are the following:

Depressurization of the brass flask in which the wax is sealed. During operation, brass solder undergoes corrosion, as a result of which its integrity is compromised. This malfunction manifests itself in the fact that the valve opens completely, but is unable to close back. Antifreeze constantly passes in a large circle, and the engine cannot warm up to operating temperature.
Foreign particles entering the thermostat. This happens if the coolant has not been changed for a long time, and has also been diluted with water, and scale has formed. In this case, the valve may become stuck in both the open and closed positions. In the first case, warming up will take longer than usual, and in the second, the internal combustion engine will overheat.

Diagnostic methods

Start the engine and wait until the coolant temperature reading on the instrument panel is around 85 degrees.
Open the hood and find the pipe leading from the thermostat to the radiator. It should have approximately the same temperature as the rest of the cooling system pipes. If it is significantly colder, the valve is either closed or not fully open. This is a serious reason to replace the Lada-Priora thermostat.

Signs of trouble

Even if you do not carry out diagnostics, you can suspect the presence of thermostat malfunctions during the operation of the car. They will manifest themselves as follows:

The engine takes a long time to warm up.
Heating the coolant to a temperature of 130 degrees and above.
The sensor shows the temperature during a stop is significantly higher than when driving at speed.
The lower thermostat pipe begins to warm up immediately after the engine starts. This indicates that the valve is not closing completely.
The lower pipe is cold when the temperature on the instrument panel approaches a hundred.

The last point reports a closed valve, except in the case when the cooling system fan is faulty, which does not require replacing the Priora thermostat.

DIY replacement

To change the thermostat you need:

Drain antifreeze from the radiator. To do this, unscrew the tap at the bottom and also remove the plug from the expansion tank. The container for draining must be prepared at least 5 liters.
Unscrew the clamp of the pipe going to the radiator and pull it off. A little more coolant will leak out, so you need to place a bottle to drain it.
Remove the opposite pipe in the same way.
Remove the 3 thermostat bolts using a hex wrench.
Move the rubber sealing ring from the old thermostat to the new one, lubricate the adjacent surfaces with silicone sealant.
Install the new thermostat and tighten the bolts.
Place the pipes in place, having previously lubricated the seats on the thermostat with silicone sealant.

Additional Tips

Before replacing the Priora thermostat, it makes sense to check the new one for functionality. To do this, the part is placed in a pan of water.

As you gradually heat the water, you need to watch how the valve opens. If it is completely open at a temperature close to boiling, then it can be installed on the machine.

Thermal inspection: how to check the thermostat without removing it from the car or when purchasing it in a store

Cold in summer is good. In winter, on the contrary, you want warmth, and more: both for the engine and for the interior. The problem cannot be solved without a thermostat, so they decided to introduce a thermal switch into the cooling system. The mechanism does not last forever, it serves as needed: some people take care of it for 40,000 km, others share their experience of trouble-free operation for 200,000 km. Failure will be marked by an undoubted violation of thermal equilibrium, and symptoms diagnosed at a time will indicate it.

When to change: signs of thermal switch failure

Abstract symptoms can indicate the nature of the disease that has befallen the thermostat:

Stuck in the open position (coolant constantly circulates through the radiator). In cold weather, the engine does not heat up well, and at extreme city speeds the coolant temperature drops. Let's say it's -15°C outside, the coolant at idle has warmed up to 70°C, we're driving on a multi-lane road, moving at a speed of 60 km/h, and the temperature gauge needle is either standing still or going down. Fuel consumption increases noticeably (+ 1-2 liters per 100 km).
The wedge is in the closed position (antifreeze moves along the jacket and heater radiator, bypassing the main heat exchanger). There will be no cooling and overheating is inevitable in summer. The fact is clearly clarified by the thermometer needle running upward when the cooling fan is on. Additionally, the “brains” indicate a problem in the form of an illuminated Check Engine icon.
Final stop at an intermediate position. Prolonged heating + overheating in hot weather. Slight increase in appetite (within 1 l/100 km).

It is impossible to close a large circle tightly, while the rod moves and the full opening occurs. There is no wedge. This is prevented by deposits accumulated as a result of untimely change of antifreeze, mixing coolant of different classes (for example, on a Hyundai Solaris, antifreeze can only be mixed with G11), and the use of cheap or counterfeit fluids. The fact can be revealed in warm weather only through tubes. In winter, pollution will be indicated by a reluctant rise in temperature from 70°C to 90-95°C when driving on the highway, but in the city there will be no problems with warming up. Seeing such a picture, those who like to cover the radiator grille with cardboard often persuade the owner to insulate the front end. This is definitely useful in cold weather.

Without removing it from the car: how to check the thermostat for serviceability using the engine radiator pipes

The main heat exchanger is connected to the engine cooling system by two hoses: inlet and outlet. The direct function of the thermostat is to connect/disconnect the heat exchange device by opening/closing one of the tubes at a temperature of 82-87°C. Which one is decided by the engine manufacturer.

Which hose should I touch?

Before you check the thermostat without removing it from the engine, you need to find out where it is installed: before the radiator or after it. This affects which pipe will be used to assess the regulator’s performance:

Upper - in systems with a thermal switch located in front of the heat exchanger (for example, Lada Granta).
Lower - in designs with a thermostat after the radiator (for example, VAZ 2110, Hyundai Solaris, Peugeot 308).

Norm and deviations

The diagnosis is made by the temperature of the hose. There are two methods for assessing it: approximate (by touch of the hand) and accurate (with a pyrometer). It is necessary to start diagnostics immediately after a cold start of the engine, examining the degree of heating of the upper or lower tube (depending on the thermostat layout):

The tested hose was cold for some time, and the rest were hot, then became warm. If a pyrometer is used, at this moment the temperature of the pipe rises sharply to the point at which the thermostat opens. The thermostat switched the flow to a large circle. OK.
The blocked tube immediately began to slowly warm up. The thermal switch is constantly open, and antifreeze circulates through the radiator when the engine is cold. Defective - stuck in an open, intermediate position or does not close completely.
The hose being examined is constantly cold; according to the sensor on the dashboard, the temperature of the power unit has reached operating temperature. The thermostat is stuck in the closed position, the coolant constantly moves in a small circle. Defective.

At home: how to check the thermostat directly when purchasing in a store and before installing

There are plenty of defects, especially among Russian thermostats for VAZ. Unfortunately, there is no convenient way to fully test the node directly in the retail network. Holding a thermal device in your hands, the most you can do is blow into the fitting that opens access to the radiator. If no air flows, then the large circle is closed, which is what it should be at room temperature.

If the valve moves to the opposite position in which the flow moves through the heat exchanger, no one can tell when buying it in a store, and the thermostat will have to be checked at home. There is a point in this: if a defect is detected before installing the car, you won’t have to drain the coolant again and tighten the nuts. Diagnostics takes place in a pan pre-filled with cold water:

Immerse the thermostat in water so that it does not come into contact with the walls of the container (hang it on a wire, the opposite end of which is secured to the crossbar).
Place a thermometer calibrated to 100°C into the pan.
Turn on the burner.
Monitor whether the valve begins to open when approaching the thermostat response temperature (remove it from boiling water with pliers or lift it by a stick and see if water flows from the outlet).
Make sure that the thermal switch completely switches to circulation in a large circle (water stops flowing from the other pipe).

How to quickly determine that the thermostat on a Priora is faulty?

1. Warm up the engine slightly (to about 85 degrees).

2. Open the hood. Carefully touch the radiator hose at the bottom. A cold pipe indicates that the thermostat is working properly. The liquid does not flow to the radiator at this temperature, since the Priora’s thermostat is still closed. If the pipe is hot already at 80 degrees, this indicates a malfunction.

3. Now give the engine a good run.

4. Locate the radiator hoses. They are black rubber, about 5 cm in diameter.

5. Touch them carefully (you may get burned). If any of them are cold, it means that the thermostat on your Priora car simply does not work and requires replacement.

Choosing new thermostats for cars

Since the cost of a thermostat is usually not very high, and it is responsible for the performance of an expensive engine, it is better to change it every two years.

Today you can find several types of such devices on the specialized market. The most primitive are mechanical devices. But an electronic thermostat for a car controls the temperature using a special sensor.

There are also electromechanical units that operate using contact pairs.

When choosing a thermostat, it is very important to know its temperature regime, since it differs for different brands of cars. And, of course, it is necessary to select the device only strictly according to this parameter.

Thus, thermostats for cars can be high-temperature, operating in the range of 300–1200 °C. The valve opening for medium-temperature devices occurs in the range of 60–500 °C.

There are also low-temperature devices with an operating temperature of less than 60 °C.

Replacing the thermostat on a Priora - how to spend less than an hour?

To check the functionality of the thermostat, you need to warm up the engine and turn off the ignition. After this, open the hood and find two hoses there that are connected to the radiator.

We touch them with our hand and look at the temperature sensor readings. If the latter shows that the engine is hot, while at least one of the hoses remains cold, then the “temperature guard” needs to be replaced.

To do this, you need to read the information on how to remove the thermostat.

First of all, the cap on the radiator is unscrewed and the liquid is drained from the cooling system. Then, after loosening the clamps, you need to dismantle the water pipes that go to the thermostat. After unscrewing the mounting bolts, you can remove the device itself.

Now we open its cover and, pressing the spring with pliers, pull out the sensitive element and replace it with a new one. In addition, the rubber gasket also needs to be replaced.

Now you don't know how to properly install the thermostat? But there is nothing complicated in this operation, you just need to act strictly in the reverse order.

Examination

Since problems with the device can arise at any time, the driver needs to know how to check it even in situations where it is not possible to get to a car service center.

The easiest way to check the thermostat is to leave it on. To do this, the internal combustion engine must be cooled down. We start the engine and at this time we need to touch the pipe, which is attached to the radiator. During the first few minutes, the radiator is not yet functioning, so the pipe should be cool. After this, wait until the engine warms up to operating temperature. Next you need to check the same pipe, it should be heated.

If the tube remains cold, then it is worth looking at what thermostat is used and replacing it with a similar one.

If the pipe heats up almost immediately, the engine will operate at lower temperatures. This problem is not critical, but because of this, gasoline consumption increases.

There is also a second way to check the device by dismantling it.

Before dismantling, you need to drain the antifreeze into a pre-prepared canister. After this, remove the thermostat, which is installed behind the pipe. We take the device and put it in a pan of water and put it on gas. At the same time, it should not come into contact with the walls. We lower the thermometer into the water and wait for the water to heat up to the operating temperature of the motor. When the temperature readings reach the required value, make sure that the valve changes from the closed position to the open position. If this does not happen, it is recommended to install a new device.

Replacing the thermostat on a Priora is not a complicated process that does not require special skills and can be diagnosed at home using improvised methods.

To replace, we need a Phillips screwdriver and a 10mm wrench to loosen the clamps, a 5mm hexagon, a hose, a watering can, a 5 liter bottle to drain the antifreeze, and a 1 liter bottle when unscrewing the far pipe. The leak will come from two places.

To make it easier to carry out all manipulations, remove the air filter housing (AF), take a slotted screwdriver to remove and return the rubber bands to the attachment points of the air filter housing. Next, simply unscrew the fastening nuts.

Before installing a new thermostat, check it using the methods indicated above; assembly is carried out in the reverse order.

But for more accurate diagnostics, it is recommended to contact specialized service centers that will perform their work efficiently and provide a warranty period for them.

Self-replacement of the thermostat on Lada Priora

How to replace a Lada Priora thermostat

The need to remove or change the thermostat on the Lada Priora is caused by its malfunction or the appearance of antifreeze leaks. One of the signs of a thermostat malfunction is also the engine taking a long time to warm up.

The reason for this is that the thermostat does not close the large circulation circle of the cooling system, which leads to a double increase in fuel growth when warming up a cold engine.

Or, as an option, the thermostat, on the contrary, does not open a large circle, the temperature rises to a critical level, and the engine overheats.

Causes of thermostat malfunctions

The main cause of thermostat breakdowns is corrosion, scale, and dirt that forms in the cooling system during operation. The thermoelement becomes less sensitive to changes in coolant temperature due to rust and scale particles accumulating on it.

In addition, this complicates the movement of the rod that closes and opens the small and large circles of the cooling system. To avoid such defects, you should use good antifreeze and monitor its condition. At the time of replacement, you should check the bottom for the presence of rust particles and plaque.

You can read about how to flush if there are foreign substances in the antifreeze in this article.

Checking the thermostat on Lada Priora

To confirm or refute a thermostat malfunction, it is worth performing the following test.

We start the engine and warm it up to an operating temperature of 85-90 degrees.
In this case, the lower radiator pipe should not heat up.

The explanation for this is that the thermostat valve is closed, so coolant does not move through the pipe. Thanks to this, the engine warms up quickly, since the coolant circulates only in a small circle.

When the antifreeze reaches the desired temperature, the valve opens, freeing access to a large circle for the circulation of coolant. As soon as the valve opens, the liquid will flow in a large circle, so the lower pipe will heat up.

If the pipe becomes hot even at a temperature of 70-80 degrees, then the thermostat needs to be replaced.

Attention!

Sometimes lack of coolant circulation is the cause of a faulty water pump, so checking it is also necessary. You can see how to do this here and here.

How does a thermostat work?

Also check out

To replace the thermostat on a Lada Priora, you will need a simple set of tools and clean coolant.

Algorithm for self-replacement of the thermostat on Lada Priora

Drain the coolant from the cooling system by unscrewing the radiator cap.
Loosen the clamps that secure the water pipes leading to the thermostat and remove them.

Changing the thermostat on Lada Priora

Unscrew the thermostat mounting bolts and remove it.
Remove the housing cover by unscrewing the fastening bolts.

Do-it-yourself replacement of the Priora thermostat

Remove the rubber gasket located on a certain recess of the thermostat cover. Make sure that its condition is good, otherwise replace it.

Replacing the Lada Priora thermostat at home

Get the mod (sensitive element). To do this, you need to squeeze and rotate the spring with pliers and remove the fixing plate from the hook with the grooves.

Thermostat Lada Priora

Check the new mod before installing. This is done as follows: put it in water and heat it. At 85-90 degrees the thermostat rod should move out; if this does not happen, the sensitive element needs to be replaced.

How to check the thermostat at home

Recommendations: You can completely replace the thermostat without disassembling it. It will cost more, but it is easier to do.

After replacing the Lada Priora thermostat, you need to fill in clean antifreeze and reassemble in the reverse order. After this, start the engine and check the operation of the thermostat (the test algorithm was described earlier). Make sure there are no leaks.

Best winter thermostat

There are very few manufacturers of thermostats with an increased element opening temperature. One of the most reliable and best companies producing them is LUZAR. It is this company that meets all quality standards in the manufacture of its parts.

Luzar thermostats are distinguished by their excellent workmanship, and they are also tested for accuracy of operation of the element up to 100%. Therefore, when purchasing a thermoelement from this company, you can be 100% confident in its efficiency and reliability.

They are tested in special cell-baths with temperature control; response speed, reliability and efficiency are checked. All elements that do not pass inspection are rejected and sent for revision, that is, it is almost impossible to run into a defective element.

Applicability

Luzar thermostat article number: 21082-1306010-92.

This element of the system is assembled with a cover and an o-ring, therefore, replacing it will not pose any difficulties.

Its cost is from 600 rubles and above, depending on the region and store.

Such a thermoelement is installed not only on the Lada Priora, but also on other Lada cars with an injection engine. All Lada modifications on which such a thermostat can be installed are shown in the table below.

Table of applicability of the LUZAR winter thermostat

The cooling system of a car is one of the main systems that ensures the possibility of its operation. The thermostat, in turn, is its most important component, and its malfunction can sometimes lead to considerable costs.

How will replacing the thermostat on a Priora save the family budget? Everything is trivial - when this device does not work, the engine may overheat. All this increases wear on the motor and, as a result, will lead to serious damage.

The price of a thermostat for Priora is low. Therefore, it is better to change it every two years. Knowing how to change the thermostat on a Priora, it’s quite possible to do it yourself. However, there are some peculiarities. Therefore, it would not be superfluous to have a little theory in order to decide which thermostat for the Priora is better.

What is the best thermostat to install on Priora - analogues

A regular retail parts store can offer analogues of the thermostat for Priora from the following manufacturers:

Stellox;
luzar;
Gallant;
FENOX.

In the question of which part is better to choose, it is hardly possible to compare analogues - they differ in quality. When asking drivers what thermostat is installed in their car, the most common answer is that only the original one is installed. It’s easier to trust the manufacturing plant - they know what they’re dealing with.

Replacing the Priora thermostat is required if the following symptoms occur:

Unfavorable factors such as dirt in the coolant, scale, corrosion and metal flakes can cause the moving parts of the valve to stop working properly. It may also jam. The following signs may indicate this:

• The coolant temperature rises to operating level too slowly, taking longer than 10 minutes. This makes it clear that the valve is always open. Therefore, the coolant, circulating in a circle through the radiator, does not allow the engine to warm up.

• The engine heats up quickly, but the temperature becomes critical. This happens when the valve is closed, blocking the flow of coolant to the radiator.

Therefore, when choosing which thermostat is best for a Priora, do not forget about the coolant. It must be clean and of good quality.

How to replace a thermostat on a Priora

In order to successfully replace the thermostat in a Lada Priora car, you need to prepare. You should have clean coolant and tools on hand: a Phillips screwdriver, narrow-nose pliers and a five-point hex.

On a Priora car, the thermostat is replaced using the following algorithm:

1. Unscrew the cap on the radiator and drain the coolant.

2. To remove the Lada Priora thermostat, you will first have to loosen the clamps and disconnect the hoses that are attached to the thermostat cover.

3. Having previously unscrewed the bolts, remove the thermostat (Photo of the Priora and its engine compartment - see below).

4. Remove the thermostat cover bolts and pull it out.

5. Inspect the gasket located in the annular groove of the cover. If it is worn out, replace it.

6. Using pliers, pull out the mod. To do this, carefully clamp it, turn it and remove the fixing plate from the grooves.

7. We check the functionality of the new mod: heat it in a container with water. The pin should extend when the temperature reaches 90 degrees. Is this not happening? This means the mod is faulty.

8. We assemble the new thermostat in the reverse order. Do not forget to coat the joints of the pipes and the gasket on the cover with automotive sealant.

9. Pour clean antifreeze into the expansion flank of the engine up to about.

10. Warm up the engine, checking for leaks.

The price of a Priora thermostat fluctuates around 500-1000 rubles. When choosing which thermostat is best for Priora, focus on workmanship, not cost. The new thermostat will allow the Lada Priora to delight you with uninterrupted operation.

Program of events

During the family holiday, about 60 venues will appear in Luzhniki, and this does not include recreation areas and food courts. They will be open from 10:00 to 19:00. Visitors will be able to dance, play sports and enjoy good music. Admission to all events is free.

Photo: Mikhail Frolov

The sports program alone includes over 40 competitions. There are also street activities - streetball, workout, parkour, freestyle, and the usual track and field races, push-ups and wrestling. You will also be able to throw darts at darts, take part in a drone race, show off your yoga skills and become part of a dance festival.

Photo: Kristina Brazhnikova

Among the major competitions that will take place at Luzhniki on City Day are the Russian Beatbox Championship, the final of the Archery World Cup and the large chess festival “Moscow Blitz” with the participation of the world’s leading grandmasters.

The program also includes performances by the Russian national figure skating team, a mini-football tournament among bloggers, a mass tournament “Football 2x2” and a match between the teams “Chertanovo” (Moscow) and “Neftekhimik” (Nizhnekamsk).

One of the most crowded venues will be the Moscow Fitness Fest, which is organized by the popular trainer in Moscow Dmitry Yashankin. The program includes lectures, seminars, open training sessions, and guests include stars, bloggers and champions. For example, Natalya Sevastyakova will give everyone advice on balanced sports nutrition. And at the Bupasteam site there will be demonstration boxing training in an open ring with the participation of Alexey Papin, Artem Oganesyan and coach Andrey Bupas Ivichuk.

There will be a separate creative area for children, which will include a competition for drawings with chalk on asphalt on the theme “We draw sports!” Professional instructors and animators will work with the children

An important component of the holiday will be art and photo installations, numerous swings, climbing frames, game modules, climbing walls, giant construction sets and poufs

Also at VDNKh there will be a special pavilion as part of the project “Helping parents in choosing a sport for their children,” where volunteers will tell about the city’s sports institutions and help them sign up for classes.

Photo: Kristina Brazhnikova

Which thermostat is better to install on Priora

In order not to be tormented by the question of whether it will fit or not, it is much better to buy a standard Priora thermostat, the catalog number of which is 21082-1306010-10. Various analogues should not be used.

As a last resort, you can take a VAZ branded part from other car models. Check with the store that you are choosing a thermostat for a Priora. An experienced sales consultant will tell you which one is better.

In addition, the correct choice will be facilitated by knowing at what temperature the thermostat on the Priora opens. Starting to open at 83 degrees, the rod fully opens at 102 degrees Celsius. Take this into account when deciding which thermostat is best for the Priora if you decide to install something different.

Standard part - article number, price

The thermostat for the Lada Priora car is produced not only by the Volzhsky Automobile Plant - there is

cheap analogues, not at all pleasing with quality and durability. Compared to them, the price of a thermostat on a Priora with a 16-valve engine is not very high - about 500 rubles.

Quite a few remain who adhere to the theory that even an analogue can be better than the original; the main thing is to search well. The article number for this part for Priora must contain the following numbers - 21082-1306010-10.

How to check for functionality

If all the described actions are not enough to determine the condition of the part, you can resort to experiment. As written earlier, to start working the part you need to feel the temperature of about 93-95 degrees. Why not replace the coolant with water?

The experiment can be carried out anywhere there is a kettle. After pouring approximately 300 ml of boiling water into a cup, you will have to wait 2 minutes, and then lower the “test person” into hot water. If it is working, then you can clearly study the principle of its operation. The rod of the part will begin a kind of movement, and the valve will rise to open the fluid communication through the large cycle.

Replacing the thermostat is not the easiest repair operation, but it is necessary so as not to “boil” in a traffic jam. It all depends on the choice of part and priorities. If you are too lazy to change it on time, engine wear will increase and, accordingly, its life will decrease.

Cost of replacement work

The standard thermostat of the VAZ 2170 Priora has catalog number 21082-1306010-10. When replacing, it is best to use a branded VAZ part, bypassing various types of analogues. As an alternative, you can use thermostats for other VAZ models with the following catalog numbers:

21082-1306010-11;
21082-1306010-12;
21082-1306010-14;
21082-1306010-15.

The thermostat is supplied with a 5mm hex key.

To be sure that the purchased thermostat is working, it is recommended to test it in hot water using the method described above before installing it.

The cost of a thermostat for a VAZ 2170 is about 500 rubles. The price for replacing it at service stations varies from 500 to 800 rubles.