The best thermostat for VAZ 2110 injector 8 valves

The heating temperature of the engine in the VAZ-2110 directly depends on the thermostat; this unit also affects the speed of warming up and the timely removal of heat from heated parts of the car. Therefore, when the thermostat fails, the engine either heats up too much or does not heat up at all, and the temperature inside the VAZ-2110 can be noticeably low.

Domestic cars are equipped with different thermostats; until 2003, old-style devices were installed; later they were replaced by new ones, which are considered the “warmest” for manual cars. If the thermostat has already been changed at a service station, it is possible that the unit from the Lada Grant was fixed - according to experts, a good option for the VAZ-2110.

An important part for replacing an old one in case of problems can be purchased at a specialized auto parts store or, if you are confident in the seller, in an online store. The latter method of purchasing is more troublesome, but if the seller is decent, it allows you to save money on good equipment.

Beginners are wondering: is it necessary to change the thermostat or can it be partially repaired? In most cases, the device is replaced, but if you understand the internal structure well, why not try to revive the unit yourself.

In any case, be prepared to replace one of the important elements that caused the design to malfunction.

What is a thermostat?

This is not a standard 6 "hole" thermostat

The thermostat itself is an important part in the engine cooling system. It is designed to ensure that the engine is cooled according to its needs.

For example, you started the engine “cold”, then at degrees from 80 to 90 a large circle opens and liquid enters the radiator and begins to cool the engine more intensively than in a small circle.

Thermostat operating principle

The thermostat itself consists of:

1. Frame.
2. Internal compartment.
3. 2 pipes with valves.
4. "Core". Thermoelement (copper powders, a mixture of granulated wax, graphite and aluminum in a special proportion).
5. Valves.

How to identify a breakdown?

But there are also auxiliary signs: there is no heat in the cabin when it gets cold, a decrease in dynamic performance (power, speed), increased fuel consumption (about the passport consumption standards here).

SIGNS AND CONSEQUENCES OF A MALFUNCTION

What consequences should you prepare for if you failed to check the functionality of the thermostat in time?

• Poor performance of the car interior heater. If the valve is stuck open, coolant constantly circulates through a large circuit. Cooling of the radiator by the flow of incoming air and a general increase in the surface area that gives off heat leads to constant underheating of the engine. Because of this, not only does the stove heat poorly, but also the power decreases and fuel consumption increases.
• Motor overheating. A short-term excess of operating temperature can only lead to overheating of the piston rings, due to which their elasticity is lost. This will subsequently lead to loss of compression and increased oil consumption. Long-term operation in overheating mode is fraught with breakdown of the cylinder head gasket, thermal deformation of the cylinder head, loss of elasticity of the valve stem seals, and scuffing of the cylinder-piston group. As you understand, it is much easier to check the thermostat yourself than to pay for a major engine repair. If the cap of the expansion tank is faulty or cannot cope with the increased pressure in the cooling system, the tank may crack and the integrity of the radiator will be compromised in previously damaged areas.

Modification of the VAZ 2110 thermostat

Modifying the thermostat of the VAZ 2110 will improve the heating of the interior in cold weather, if with a standard thermostat it was necessary to warm up the engine, wait until the stove heats up, after the changes made the process will take less time. Let's consider what this procedure consists of. Why on the VAZ 2110 do they install the same part, but a six-hole one, instead of the factory five-hole thermostat, which is intended for a more modernized VAZ model called “Kalina”.

Even when installing a new part, modification of the VAZ 2110 thermostat is required. The differences between five- and six-hole thermostats lie not only in the sixth fitting, but also in the diameter of the bypass channel through which the coolant passes. The smaller the diameter of this channel, the better the stove heats up. Therefore, a six-hole thermostat with a narrow bypass channel is more popular.

If you have no desire to change a spare part, you want to modify the old five-hole VAZ 2110 thermostat, this work will not cause any difficulties.

Simply reduce the diameter of the bypass channel and the car will become noticeably warmer.

For this work, you will need an aluminum plate of the desired shape, which will easily cover the old bypass channel and have a smaller diameter of the drilled hole. This plate is fastened using cold welding or rivets.

The technology for modifying the six-hole thermostat for the tenth or twelfth VAZ model is absolutely similar to that described above, only you need to connect the heater return to the sixth fitting.

We can summarize: modification of the thermostat for the VAZ 2110 car makes it possible to more effectively heat the interior in winter.

You can modify the factory five-hole thermostat or install a six-hole thermostat, also making simple changes. As a result, the stove heats the air in the cabin faster, but the engine takes a little longer to warm up.

There are many more advantages, which is why car enthusiasts very often perform such actions.

It is not difficult to modify the thermostat yourself, but if for some reason you tend to doubt your own abilities, it is better to contact a specialist with extensive practical experience. This will significantly save time spent on upgrading your car.

VAZ 2110 thermostat injector: where it is located, how it works and how it works

So, the thermostat in a car is a small element in the form of a plug that opens automatically when the coolant (coolant) is heated to the optimal temperature (75-90°C) to connect the cooling jacket of the internal combustion engine and radiator to the cooling system.

Thermostat 2110 not only helps to quickly warm up the car engine to the required temperature, increasing its wear resistance, but also limits the emission of harmful substances, protects the engine from overheating, etc.

At its core, the thermostat of the VAZ 2110 and many other cars is a valve controlled by a temperature-sensitive element. On the “ten” there is a thermostat inside a cover located under the hood of the car, just below the air filter housing.

The operating principle of a thermostat, made in the form of a spring-loaded bypass valve, is the ability of the temperature-sensitive element to switch the flow of coolant (antifreeze) depending on its temperature:

• closing the airlock - sending antifreeze in a small circle, bypassing the radiator of the cooling system (coolant circulates around the cylinders and the cylinder head);
• opening the gateway - the coolant circulates in a full circle, capturing the radiator, water pump, and cooling jacket of the internal combustion engine.

Main components of the thermostat:

• frame;
• outlet pipe and inlet pipes of the small and large circles;
• temperature sensitive element;
• bypass and main small circle valve.

How is the VAZ 2110 thermostat replaced?

The procedure flow is as follows:

• the car battery is dismantled;
• the plug is removed from the expansion tank;
• unscrew the drain plug located at the bottom of the radiator;
• The liquid is drained from the tank, after which the plug can be tightened;
• the hose clamps on the thermostat pipes are loosened;
• hoses are dismantled (both rear and front);
• unscrew the bolts (there are three of them) that secure the thermostat cover and remove it.

In order to remove the thermostat from the cover, it is best to install the latter in a bench vice (you will need to mount jaws or soft pads on them to protect the aluminum surface from scratches). After this, press down the thermostat fixing plate (the spring will resist, you will have to apply some force), turn it and remove it from the grooves. Now the device we are interested in can be easily removed. And in its place you can install a new one, proceeding in the reverse order.

Replacing the thermostat VAZ-2110

It is necessary to be able to dismantle the main element of the cooling system not only for its replacement, but also for periodic inspection. So prepare your tools:

• two canisters (clean, plastic, 5 liters);
• thoroughly washed plastic bottle;
• a medium-sized Phillips screwdriver;
• paint cone;
• wrenches (sizes 8 and 12).

Repair work is carried out according to the instructions:

1. Disassembly should begin with the air filter housing. Using a size 8 wrench, unscrew the bolts holding it in place. There are only two of them.
2. Carefully inspect the housing and remove the sensor located on it.
3. After these procedures, the protective shell can be removed from the filter. Remove the filter itself.
4. Immediately after carrying out the procedures described above, you will be able to see the thermostat. Loosen the clamp that was hidden under the body.
5. Cut one plastic canister - remove one of its side walls so that the drain hole is located at the bottom. This way you will get a convenient container into which you can collect antifreeze from the pipes. Using a hole with a lid, you can easily transfer the liquid into a whole canister.
6. Separate the neck from the plastic bottle.
7. Place the cut canister under the pipes at the moments when you disconnect them. Do this in the following sequence:
   separate from the expansion tank;
8. from the radiator;
9. from the stove;
10. from the motor.
11. During this repair, you can immediately replace the pipes. Inspect them for wear and, if necessary, install new ones immediately.
12. After removing the thermostat, a little more coolant will fall into the prepared canister, so do not remove the container ahead of time.
13. Using a filter from a painting paper cone, strain the antifreeze into a clean canister.
14. Install the new part and tighten all clamps. Pour coolant into the expansion tank. Assemble the air filter.

During the repair process, it is best to replace the antifreeze and air filter. Immediately after assembly, start the engine to remove any air pockets from the cooling system. You should not move away immediately; to do this, you will need to warm up the engine at idle speed.

Finally, check the fluid level in the expansion tank. If it falls, check the build quality. If necessary, add antifreeze.

The redistribution of fluid flows in the engine cooling system is controlled by a thermostat. Over time, the thermostat valve may jam on a large or small circulation circle, and the cooling system will not work correctly (engine overheating/underheating). How difficult is it to check and change the thermostat yourself?

Checking the Thermostat

How to check the thermostat. In fact, there are several ways to do this in different situations: Checking the thermostat at home:

To check the thermostat, lower it into a vessel with coolant, heat the vessel and use a thermometer to control the beginning of the opening of the main valve.

For reference :

At a temperature of 87±2°C, the thermostat bypass valve begins to move, opening the main pipe; in this case, part of the liquid circulates in a large circle through the radiator. At a temperature of about 102°C, the pipe opens completely and all the liquid circulates in a large circle. The stroke of the main valve must be at least 8 mm. The thermostat of the VAZ-2112 engine has an increased resistance of the bypass valve (throttle hole), which increases the flow of fluid through the heater radiator.

Checking the thermostat on a car:

When checking the thermostat on a car after starting a cold engine, the radiator outlet (lower) hose should remain cold for a while and then quickly warm up, indicating the start of coolant circulation in a large circle.

Checking the thermostat upon purchase:

Checking the thermostat in the store is very simple, just blow into the thermostat fitting. Thus, we will check how tightly the small circuit is closed when cold.

Removing the thermostat VAZ 2110

I think everyone knows where the thermostat is located; in extreme cases, you can find out from photographs. Before removing the thermostat, you need to drain the coolant (in detail). We show dismantling the thermostat using the example of a VAZ-2111 engine:

1. Loosen the radiator outlet hose clamps.
2. Loosen the clamps of the supply hose of the pump pipe and the hose connecting the thermostat to the outlet pipe.
3. Remove thermostat.

The thermostat is installed in the reverse order. By the way, this photo report shows an old-style thermostat. For more productive operation of the heater, it is recommended to replace it with a new one (six hole), and if desired, the thermostat can be modified.

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You can buy a thermostat for the VAZ 2110 in online stores. Its approximate price is from 300-450 rubles. depending on the model and manufacturer. If you do not change the thermostat assembly, but replace only its thermocouple, then you will be able to save about 200 rubles.

Another important point is to determine the quality of the thermostat in the store. To do this, blow into the thermostat fitting. Thus, we will check how tightly the small circuit is closed when cold. See also other ways to check and replace the thermostat.

Signs of thermostat malfunctions and diagnostics

During operation, the thermostat valve is subject to operational and temperature loads, that is, it can fail for many reasons. Among the main ones:

• low-quality or used coolant (antifreeze);
• mechanical or corrosive wear of the valve drive, etc.

A thermostat malfunction can be determined by the following symptoms:

• The internal combustion engine of the car, without being subjected to special loads, overheats - the thermostat thermocouple has ceased to perform its functions. If everything is normal with the cooling fan, to check, dismantle the thermostat and check the functionality of the valve;

To check the thermostat on a VAZ 2110, you can use several methods, since there are several methods for diagnosing the thermostat for failure:

• Start the car and warm up the engine to the desired temperature, first opening the hood. Find the lower pipe coming from the thermostat and feel it for heat. If the thermostat is in good condition, the pipe will heat up quickly;
• Dismantle the thermostat and remove from it the thermoelement responsible for starting the coolant circulation. Place the thermocouple in water heated to a temperature of 75 degrees and keep it until the water warms up further (up to 90 degrees). In good condition, when the water is heated to 90 degrees, the rod from the thermoelement should extend.

If problems are found with the operation of the thermostat, it needs to be replaced. By the way, when buying a new thermostat, you need to check it by blowing into the fitting (no air should escape). Also, some owners, before installation, immerse the new device in hot water for insurance, as described above. This eliminates the risk of installing a faulty device.

Ways to check functionality

The engine cooling system uses a thermostat to quickly warm up and then maintain operating temperature. After a cold start, the thermostat valve shuts off coolant flow to the main radiator. The engine warms up much faster, since antifreeze circulates only in the “jacket” (small coolant circulation circle). A sensitive element is installed in the thermostat housing, which expands in volume during the heating process, forcing the main valve to move and open coolant access to the main radiator. Antifreeze begins to circulate in a large circle, thereby cooling the engine.

• According to the degree of heating of the outlet pipe going to the radiator. Before the coolant reaches the opening temperature, which on most cars is between 80-90 degrees Celsius (at 95-105ºC the valve opens completely), the pipe must be cold. If it warms up almost immediately after starting the engine, the thermostat is stuck in the open position, and the coolant is constantly circulating in a large circle. When the thermostat is stuck closed, the hose will be relatively cold even when the engine is fully warmed up. The situation is extremely dangerous, as you risk losing a large sum while eliminating the consequences of engine overheating.
• Carry out a test by placing it in a heated liquid. Below we will describe in detail how to fairly accurately check the thermostat at home.

Is it worth checking without removing it from the car?

The advantage of diagnostics based on the degree of heating of the pipe is that you can check the thermostat without removing it from the car. But unlike the test at home, the method does not allow you to accurately estimate the opening temperature and response speed.

By controlling the degree of heating of the liquid, you can simulate changing the cooling and warming up modes of the engine several times in a row. The tricky thing about faults is that they can manifest themselves periodically. Therefore, if there are serious suspicions that the thermostat is not working properly, we recommend checking it only with a test at home.

Thermostat VAZ 2110 - change it yourself

Probably every more or less experienced driver knows that a thermostat is a device that is responsible for the competent redistribution of liquid flows in a car engine.

During active operation of the machine, this device may jam on a small or large circulation circle, which will cause underheating or overheating of the motor.

It is clear that a vehicle with a faulty cooling system cannot be used, which means that the owner of the car will have to replace the device that has failed.

But before that, you should make sure that such a replacement is really necessary. That is, you need to check the thermostat for functionality

This is done without dismantling the engine in this way: we start the engine and direct all our attention to the instrument panel, where the temperature of the cooling fluid is displayed. The main valve of the device we are interested in opens at a temperature from +83 to +87 ° C

If the engine has a lower temperature, the liquid moves in a small circle (that is, the valve is in a closed state).

You can determine whether the thermostat is working or not quite simply - touch the vehicle’s cooling radiator and its lower hose. If the hose feels colder to the touch, it means the device is in the closed position (there is no coolant flowing into the radiator). At 102 degrees, the radiator valve opens fully. In this case, the lower pipe and the upper zone of the radiator should be noticeably hot (but the lower zone is colder). If you do not feel the heating with your hand, it becomes clear that the thermostat needs to be changed.

How to check a car's thermostat

There are two main ways to check a car's thermostat. One of them is carried out without removing the part, but requires a pyrometer, and the second is simpler, but the element will need to be removed from the engine during the test.

As you know, the thermostat housing is connected to the upper radiator hose, which is included in a large circle of coolant circulation. Accordingly, with the thermostat working, after starting the engine, the upper radiator hose should remain cold (slightly warm) for some time until antifreeze is released through it.

To check the thermostat without removing it from the engine, get a pyrometer (temperature measuring device). You may come across the opinion that the check should be done without a device, measuring the temperature with your hands, but this is quite dangerous, given the large number of moving parts when the engine is running.

Point the pyrometer at the upper radiator hose and start the engine (cold start). For two or three minus periods, observe the device’s indicators. Next, draw a conclusion about the serviceability of the thermostat according to the following rules:

• The hose was cold for two or three minutes (or its temperature rose slightly), and then quickly warmed up. This indicates that the thermostat is working properly, and it switched the coolant circulation from a small circle to a large circle after the engine has sufficiently warmed up;
• The hose initially warmed up slowly. In this case, we can say that the thermostat is stuck in the open position and the antifreeze does not circulate in a small circle;
• The hose did not begin to warm up quickly after two or three minutes. That is, the thermostat is faulty and it does not switch the coolant circulation from a small circle to a large one.

Important: While checking the thermostat, monitor the engine temperature on the instrument panel. If the thermostat is stuck and won't keep the coolant flowing, the engine will start to overheat, which can lead to expensive parts failure. A widespread and well-known way to test the thermostat yourself is using a saucepan

As you might guess, before diagnostics you will need to remove the thermostat from the car engine and bring it home. After this, do the following:

A widespread and well-known way to test the thermostat yourself is using a saucepan. As you might guess, before diagnostics you will need to remove the thermostat from the car engine and bring it home. After this, do the following:

Take a pot and fill it with water; Inspect the thermostat housing and read the technical information on it, which indicates at what temperature it should switch; Hang the thermostat in the pan so that it is immersed in water, but does not touch the walls and bottom of the container, that is, it comes into contact only with water; Start heating the water and put a regular thermometer in it to measure the temperature of the liquid; When the water approaches the thermostat switching value from closed to open, make sure this happens. Also compare the thermometer reading, recording the temperature at which the coolant circuit switching valve opens with the ideal values ​​indicated on the device body.

If the valve opens when heating water, track its behavior when cooling the liquid, checking at what temperature it returns to its original position. Based on the data obtained, draw a conclusion about the functionality of the thermostat.

How to replace a thermostat yourself

Replacing a faulty thermostat in a VAZ-2112 with 16 valves is a fairly simple matter, so even minor skills in car repair will help the car enthusiast to perform this operation on his own. The part is replaced in stages:

1. Start work only with a cold engine to avoid getting burns on your hands.
2. All liquid intended for cooling must be completely drained, since replacing the part involves disconnecting the pipe in which it accumulates. To avoid spilling liquid during this process, you should place a container of the appropriate size under the bottom of the car.
3. For ease of operation, it is recommended to remove the hardened air filter housing.
4. Using a screwdriver or wrench, unscrew the connectors that secure the hose to the thermostat. There should be two such hoses - one is for the radiator, the other is for the thermostat.
5. Using a hex wrench, unscrew the bolts, in triplicate, that prevent the element cover from moving when the car is running. After removing the fasteners, you should simply carefully remove the part from its permanent place.

If, upon inspection of the cover, any defects are revealed in the sealing ring, for example, cracks or deformation, this will indicate that the ring has also become unusable and needs to be replaced.

All car parts should be assembled in the reverse order that was used during disassembly.

The information described indicates that replacing a faulty VAZ-2112 16-valve thermostat is an easy operation, and if you approach the event responsibly and carry out the process step by step, then everyone will be able to correctly replace the faulty part on their car.

Replacing the thermostat on an engine with a fuel injection system:

1. For more comfortable conditions for performing the above task, you will need to remove the battery.

2. Remove the plug from the expansion tank and unscrew the drain plug at the bottom of the radiator. Drain the liquid from there and screw the plug back on.

3. Next, loosen the two hose clamps on the thermostat socket cover pipes.

4. You will also need to remove the second rear hose clamp located on the water pump supply pipe.

5. Remove the front hose from the pipe.

6. When removing the rear hose, slide it along the water pump guide pipe.

7. Then unscrew the three bolts securing the cover, and then remove it and the thermostat.

8. The lid should be clamped in a vice; when performing this action, be careful and careful. The vice must have pads or jaws pre-installed in it to avoid damage to the aluminum cover.

9. Press the thermostat fixing plate downwards, overcoming the spring force. Rotate the plate in any convenient direction and remove it from engagement with the grooves. Remove the thermostat from the cover.

How to test a new thermostat?

10. Before you start installing a new thermostat, carry out the following actions on it: lower it into hot water, approximately 78–80 degrees and heat the water to 87–90 degrees, while stirring it constantly.

11. For a normally functioning thermostat at this temperature, the rod of the silicone element should begin to extend. If this does not happen, it means that it is not suitable and you need to buy another one.

12. Correct installation of the thermostat occurs in the reverse order of removal

When performing installation, pay attention to the rubber ring in the groove of the socket. If it turns out to be torn, deformed or has lost its elasticity, replace it

13. The last point in our work will be filling the cooling system with liquid. It should be poured to the upper edge of the expansion tank fastening belt (into the expansion tank). Then tighten the plug and start the engine.

One of the important points is to check that there is no leakage of coolant that may occur through the connections of the device’s pipes. Warm up the vehicle engine at idle speed to normal operating temperature to avoid air pockets in the system.

If you have a carburetor engine installed on your car, we offer you another way to perform this work.

How to choose a thermostat: recommendations

All thermostats installed on the VAZ 2110 before 2003 were of an old design (catalog number 2110-1306010). A little later, after 2003, changes were made to the cooling system of the VAZ 2110.

Accordingly, the thermostat was also replaced (catalog numbers 21082-1306010-14 and 21082-1306010-11). The new thermostats differed from the old ones by increasing the thermoelement response level.

We also recommend reading the article about why the engine does not warm up to operating temperature. From this article you will learn why the engine may not reach operating temperature, the engine takes a long time to warm up, etc.

The choice of non-original assembled thermostats for the VAZ 2110 today is quite large, but, according to many experts, it is necessary to use only those that are directly developed and manufactured by AvtoVAZ for the VAZ 2110.

Let us also add that on the VAZ 2110 you can install a thermostat from the VAZ 2111, since it is smaller in size, structurally compact, and the use of only one hose and two clamps reduces the likelihood of leakage.

The role of the thermostat in the engine cooling system

The engine cooling system is divided into two circuits: large and small. The small circuit encloses the internal elements of the engine and the heater radiator for heating the interior. The large circuit includes the small one, but in addition passes through the cooling radiator located in front of the engine. Thus, when the coolant temperature reaches a set level, the valve opens the flow into a large circuit and the antifreeze is cooled by oncoming air, entering the cooling radiator. If there is not enough oncoming air, the engine temperature sensor transmits a command to the control unit, which in turn turns on the cooling fan located in front of the radiator.

As soon as the air entering the radiator cools the liquid to a certain temperature, the valve closes and the antifreeze again flows through the small circuit. As a result, the engine temperature is maintained in operating condition.

Cost and part numbers of the thermostat for the VAZ-2110

If the thermostat is detachable, only the top cover with the valve can be replaced.

As for purchasing a new thermostat for a VAZ-2110, a feature of this model is the ability to replace only one starting element. It will cost twice as much.

On the left is a 5-hole thermostat, on the right is a 6-hole thermostat.

When buying a thermostat, you need to remember that they come in old and new models. If your car has an old-style part installed, but the store only has new-style parts in stock, don’t be upset. If you have some ingenuity and a hacksaw for metal, the new part can be installed perfectly in place of the old part.

Adjusting the old model to the new one

Installation of a 6-hole thermostat.

To do this, you just need to saw off a piece of the pipe that comes from the pump, and then disconnect the piece from the old part. After these manipulations, the new thermostat will fit perfectly into the car’s cooling system.

Since when purchasing spare parts for domestic cars there is a chance of purchasing a defective part, before purchasing a thermostat you can check it for leaks. To do this, you just need to blow hard into the fitting. If the housing is sealed, then air should remain inside. If air comes out, then such a part is not worth purchasing.

The original thermostat, which was installed at production, has article number 2110–1306010. It is inexpensive, but its quality is not stable. Most VAZ-2110 owners prefer to purchase analogues that last much longer.

All foreign analogues are much more expensive, but by installing them, owners are deprived of the headaches associated with the operation of the thermostat. Fenox, Pekar, Finwhale, Luzar parts are in demand.

Thermostat for VAZ-2110 Finwhale T111.

Prices for VAZ-2110 components

One of the features of VAZ-2110 cars is that it is extremely rare to completely replace thermostats on it. If desired, you can only get by by replacing the starting element, which will be somewhat cheaper. The price of an assembled thermostat ranges around 1,000 rubles, while its trigger mechanism can be purchased for 400.

Please note: this VAZ model produces two types of components (new and old). It’s not scary if your car previously had an old-style thermostat, and you purchased its updated version. In this case, you will need to cut off part of the pipe (leading from the pump) with a hacksaw and disconnect the piece from the old spare part

After this, it will be possible to install the unsuitable spare part into the vehicle's cooling system

In this case, you will need to cut off part of the pipe (leading from the pump) with a hacksaw and disconnect the piece from the old spare part. After this, it will be possible to install the unsuitable spare part into the vehicle's cooling system.

Replacement

VAZ thermostat covers

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When purchasing a new spare part directly from the store, check it for functionality. To do this, you will need to blow forcefully into the fitting. The air should remain inside the housing, which is evidence of the tightness of the small circuit.

Replacing the thermostat on VAZ 2110, VAZ 2111, VAZ 2112

Welcome! Thermostat - thanks to it, the engine can heat up very quickly, and also practically not warm up at all, all this happens for the following reasons, in the thermostat itself there is a so-called valve, this valve is also filled with a special substance thanks to which the thermostat determines when it needs to fully open and when it needs to close completely, we all already know that when the engine is running (maybe you paid attention), the car heats up very quickly up to about 80 degrees, and after 80 degrees the engine heats up a little less, and after 94 degrees it does not practically does not heat up unless you are stuck in a traffic jam for many hours, the whole point is that the thermostat valve releases coolant into a large circle when it reaches 80 c°, and after 94 c° the liquid goes out to the same circle but only circulates the liquid in a small circle the circle stops altogether and as a result the car heats up less. Note! In order to replace the thermostat with a new one, you will need to stock up on: A screwdriver and one hexagon of approximately “5”!

Note! In order to replace the thermostat with a new one, you will need to stock up on: A screwdriver and one hexagon of approximately “5”!

Where is the thermostat located? It is located just below the air filter housing, you can see it very easily; to do this, open the hood of your car, then look for this same air filter housing in the engine compartment and after finding it, look a little lower, so to speak, under it, and that same thermostat will be installed there (Or rather its cover, and this unit itself is located inside the cover), for example, the location of the cover is also shown in the photo below:

When should you change the thermostat? It is replaced only if it has stopped opening the valve that releases coolant to a large circle, and also if it has left the valve in the open position and this valve is jammed.

Note! In the first case, if the thermostat does not release liquid in a large circle, then the car will begin to heat up very much, in no case allow it to overheat and, if possible, replace the thermostat as soon as possible, especially if the engine of your car operates at elevated temperatures, then your cylinder head gasket will gradually burn out, and the friction in your car’s engine will also increase, because as we all know from the law of physics, the higher the temperature, then the metal expands accordingly, and the larger the metal becomes, the larger it becomes its friction, so watch the engine overheating very carefully.

In the second case, if your valve gets stuck in the open position, although this happens rarely, you still decide for yourself whether you need to replace the thermostat or not, because if the valve is in the open position, then the engine will practically not heat up , but if it’s winter outside, it would still be better to replace this unit with a new one!

How to check whether the thermostat is working or not? There are several ways to check, namely with this unit removed, and you can also check it directly without removing it from the car at all, to do this, just start the car and warm it up to operating temperature and after warming up, get out of the car (By the way, open the hood again before leaving) and look into the engine compartment, there you will find the lower pipe that comes from the thermostat, so feel this pipe thoroughly, it should be slightly warm at the very beginning, and then gradually warm up (Depending on the temperature of the engine).

Note! If it turns out that the lower pipe does not heat up at all but constantly remains cold, then this indicates that the thermostat has become unusable and it is time to replace it with a new one, by the way, due to this course of circumstances, the engine will heat up very strongly and quickly, so if all the symptoms are obvious, then the thermostat has really become unusable, and by the way, about such a check, see in more detail in the video clip below:

If you bought a new thermostat or found an old one in your garage and want to find out if it works or not, then watch the interesting video below that explains in detail how to check this unit separately from the engine:

Dismantling and replacement

Replacing the thermostat on a VAZ 2110 car will not be difficult, even without the help of specialists. You have checked its functionality and confirmed that it is faulty.

Removal

Removing the thermostat involves performing work in the following sequence:

1. Take a screwdriver, an 8 key, a 6 hex key and other tools.
2. Make sure the engine is cold. It is strictly prohibited to carry out work on a hot engine.
3. Drain the coolant by unscrewing the plug.
4. Remove the air filter.
5. Locate the clamp on the radiator hose. Loosen it a little, you don't need to remove it completely.
6. Disconnect the hose from the thermostat.
7. Using the same method, disconnect the coolant pump hose.
8. Using a 5mm wrench, unscrew the bolts that secure the thermostat. There are three of them on the VAZ 2110.
9. Remove the thermostat cover.
10. Remove the thermostat and rubber O-rings from the cover.

Installing a new component

Now let's figure out how to change the old thermostat from a VAZ 2110 to a new one.

As we have already noted, many craftsmen recommend using a thermostat from a VAZ 2111. It is more practical, more reliable, and more compact. Therefore, we offer recommendations for replacement with an eye to using just such a thermostat.

The installation process is not complicated, but it will require some care from you in performing each of the stages:

1. First, cut a special tee into the supply hose from the stove. This is necessary because some thermostats have five fittings without access to the expansion tank. And we need six.
2. Dismantle the distributor, which will make it easier to complete the following steps. But this is only relevant for a carburetor engine. In VAZ 2110 injection models, skip this step.
3. Be sure to mark the position of the distributor relative to the body of the additional units to avoid mistakes during reassembly. Otherwise, you will disrupt the ignition and the engine will not start.
4. Remove the tee from the cylinder head.
5. Clean the mating plane head from traces of the old gasket.
6. Get a new thermostat that fits your vehicle. Muffle the thin heating output using the throttle valve. You won't need it in the future.
7. Unscrew the top pin and install a new, longer one in its place.
8. Don't be alarmed, the new thermostat is shorter than the old one, the outlet and the pipe do not match. It's not scary. It is necessary to completely dismantle the pipe and put a new one in its place. An element from a VAZ 2112 is perfect. It is also advisable to find a new corner pipe.
9. Install a new pipe, do not forget about the gasket.
10. Shorten the elbow and screw it into place.
11. Replace the standard heater hose with a new one that fits your thermostat.
12. Connect the expansion tank, which is specially designed for this purpose, to the fitting.
13. Check the quality of each connection so that you don’t have to do all the work again later.
14. Fill with new coolant.
15. Remove all air from the system.
16. Warm up the engine until the fan comes on. To do this, it is necessary to warm up the power unit to approximately 85 degrees.
17. If you don’t notice any traces of drops or leaks, it means you replaced the part correctly.

Video

Whether it is difficult or not - decide for yourself. If such a procedure looks problematic for you, it is not recommended to take risks and change the thermostat yourself. Contact a trusted service station and make sure that the technicians use a high-quality new element of the engine cooling system.

To do this, every car owner is recommended to make good connections at trusted service stations. If you treat the craftsmen well, they will do a really high-quality repair. Don't forget how important human relationships are in solving many problems.

Thermostat failure

Like any other device, the thermostat on a VAZ 2110 car has its own signs of malfunction. In particular, if it fails, the operating temperature of the engine increases significantly

Please note that on VAZ cars, after the temperature-sensitive element breaks down, the valve moves to a position in which the liquid circulates in a smaller circle

In other words, it does not enter the radiator. If this happened in the summer, then you will not see anything pleasant in such a breakdown. The most effective way to slightly cool the engine is to open the heater and turn on the blower fan at maximum speed.

Moreover, the engine will overheat not only while driving through a populated area at low speeds, but also when driving at higher speeds, when it would seem that the entire engine compartment is being blown in an increased mode.

But if you experience such symptoms on a VAZ 2110, you should not immediately blame the thermostat. It is quite possible that you have confused the failure of the fan switch sensor and the thermostat itself. On fuel-injected cars, the temperature in the thermostat housing is measured (the photo shows the location of the temperature sensor).

The electronic control unit, as well as the device in the panel in front of the driver, receives a signal from it. If the car’s fan operation is controlled through an electronic control unit, then the above-described circuit works. But on old VAZ 2110 and similar cars, a second sensor is used, which only works with the fan.

It is located in the cooling radiator housing. As a rule, it is connected to the negative power circuit without any switching devices, for example, an electromagnetic relay. As a result, the contacts inside the sensor burn and premature failure occurs.

Types of thermostats

The VAZ 2106 car was produced for many years. And during this time, engineers made a number of changes to it, including thermostats. Let's look at what thermostats were installed on the VAZ 2106 from the release of the first cars to the present day.

Single valve thermostat

Single-valve thermostats were installed on the very first “sixes” that rolled off the VAZ assembly line. The operating principle of this device has been described in detail above. To date, these devices are considered obsolete, and finding them on sale is not so easy.

The first “sixes” were equipped with the simplest, single-valve thermostats

Electronic thermostat

An electronic thermostat is the latest and most advanced modification that replaced single-valve devices. Its main advantages are high accuracy and reliability. Electronic thermostats have two operating modes: automatic and manual.

Electronic thermostats are used in modern cooling systems and differ from their predecessors in high accuracy and much greater reliability

Liquid thermostat

Thermostats are classified not only by design, but also by the type of fillers. Liquid thermostats were the very first to appear. The main component of a liquid thermostat is a small brass cylinder filled with distilled water and alcohol. The operating principle of this device is the same as that of the wax-filled thermostats discussed above.

Solid thermostat

The filler in such thermostats is ceresin. This is a substance similar in consistency to regular wax, which is mixed with copper powder and placed in a copper container. The cylinder has a rubber membrane connected to a rod, also made of dense rubber that is resistant to high temperatures. Ceresin, expanded from heating, presses on the membrane, which, in turn, acts on the rod and valve, ensuring the circulation of antifreeze.

The main element of a solid-fill thermostat is a container with ceresite and copper powder

Which thermostat is better

Today, thermostats based on solid fillers are considered the best option for the VAZ 2106, since they have the optimal combination of price and quality. In addition, they can be found in any auto store, unlike liquid single-valve ones, which are practically no longer on sale.

How to recognize a malfunction?

The device changes in two cases:

• The main valve does not open and does not allow coolant to circulate in a large circle. In such a situation, the engine quickly overheats, which can cause its failure. If nothing is done, the cylinder head gasket burns out, and due to the rise in temperature and expansion of the metal, the friction of the pistons against the cylinder walls increases.
• The valve jammed and remained open all the time. With such a malfunction, the engine practically stops heating or gains operating temperature slowly. If this happens in winter, then replacing the thermostat is mandatory.

Thus, the signs of a broken thermostat valve are as follows:

• Overheating of the power unit;
• Slow increase in temperature, and when operating in difficult conditions - boiling of the coolant;
• Increased fuel consumption.

As a rule, all these signs appear simultaneously.

READ ON THE TOPIC: Malfunctions of the VAZ 2110 and other cars of the series.

How to identify a malfunction

You can determine whether the VAZ-2110 thermostat needs to be replaced on your own.

To do this, start and warm up the car engine to operating temperature at idle speed. Next, in the engine compartment, find the radiator pipes. Touch them. If the device is working, they should both be hot. This is evidence that the coolant circulates freely in the system.

If one of them turns out to be cold, it means that the valve did not open and the thermostat did not work. But this does not mean that it needs to be changed immediately. For the VAZ-2110, replacement of the thermostat will be required only if its entire structure turns out to be unsuitable for further operation. In other cases, you can get by with repairing it.