Engine operating temperature on a VAZ-2110: 8 and 16 valves

Many experienced and not so experienced car enthusiasts have encountered the fact that when operating a VAZ-2114, the engine may not warm up to the required operating temperature or may overheat. This is due to changes in the operating temperature inside the engine or some malfunctions that periodically occur in any car. The article will tell you what the operating temperature of the engine is, and will also tell you about the causes of malfunctions associated with this indicator.

Common Causes

As you know, the VAZ 2110 is equipped with two types of engines: with 8 and 16 valves. There are several main and most common reasons why such overheating of power units occurs.

1. Low coolant level in the system
2. Faulty thermostat
3. Radiator cooling fan is faulty
4. The temperature sensor of the power supply, etc. is faulty.

Let's look at each of the causes and solutions to these problems separately.

Engine tens

Low coolant level

Coolant plays a huge role in the operation of the cooling system. A special substance, namely antifreeze, is poured into the expansion tank.

Under normal conditions, the coolant level should be at the MAX mark on the tank body. This means the container is about 50-60 percent full.

If there is no such mark on the tank, use the clamp as a guide. The liquid should reach the top edge.

1. If the engine is overheating, try adding the missing amount of coolant to the optimal level.
2. If you haven't changed the coolant in a while, it's best not to add new coolant, but simply replace it completely with new coolant.
3. When choosing between antifreeze and antifreeze, most VAZ 2110 owners prefer the former. And mainly due to the financial availability of antifreeze. But in practice, antifreeze is better. One of its most important advantages is that the substance does not freeze in severe frosts. For certain regions of our country, this is a key factor when choosing a coolant.

Thermostat

Another reason for engine overheating is a blocked thermostat valve. If it remains closed and does not open, the coolant will only move in a small circuit. As a result, this will lead to strong heating of the power plant. Overheating in itself can have very, very serious consequences.

Such a malfunction can appear at the most inopportune moment - on the road. You are unlikely to be able to carry out quality roadside repairs. But you can try one method - knock on the thermostat housing. This often allows the device to return to normal operation temporarily. This will help you get to the garage or the nearest gas station. The thermostat there has already been replaced with a new one. There's no point in fixing it. If he failed once, the situation will surely repeat itself soon.

Engine thermostat

temperature sensor

A temperature sensor is needed to respond to changes in engine temperature. When the set value is reached, the sensor is triggered and turns on the cooling fan.

If this device fails, the power unit will overheat because the fan does not work. As a result, the temperature does not drop below the critical level, but continues to gradually increase.

If you find such a problem on the road (most of the time the engine overheats in traffic jams, since the engine is running and there is no oncoming flow of cooling air), try to quickly get out of the traffic jam and find a free section of the road.

Accelerate in an open area, then begin engine braking. Then the temperature will drop and overheating will not occur. Under no circumstances should the vehicle be used regularly in this manner. But this is a great way to get to a garage or auto repair shop, determine the cause of the sensor failure, and then replace it.

Cooling Fan

The symptoms of a fan malfunction are similar to a non-working temperature sensor. That is, the engine will warm up, the indicator on the instrument panel will be in the red zone.

Again, it is recommended to use the engine braking method while driving. So, let's go to the garage. Let the car cool down. In the meantime, go shopping for a new fan. This device for the VAZ 2110 costs about 600 rubles.

Fan problems

Other reasons

There are other, no less popular reasons for engine overheating. Therefore, we suggest that you familiarize yourself with each one in our table.

Prevention

Based on the above, make it a habit:

• Check the coolant level regularly;
• use only high-quality coolant;
• never use water, since it has a lower boiling point than antifreeze, and water also contributes to rapid corrosion of cooling system parts;
• pay attention to the antifreeze temperature sensor and do not let the arrow “visit” the red sector.

Sources

• vazweb.ru/desyatka/dvigatel/sistema-ohlazhdeniya-dvigatelya.html
• drive2.ru/l/5143636/
• luxvaz.ru/vaz-2110/93-sistema-ohlazhdeniya.html

Engine operating temperature on the VAZ-2110 - is there a difference?

Despite the fact that 8- and 16-valve VAZ engines have a slight difference in the design of the cooling system, the operating temperature for both engines is the same.

Engine operating temperature on the instrument panel.
The factory predicts normal engine operating temperatures to be between 87 and 103 degrees. Maintaining the temperature within these limits can be greatly influenced by several issues related to the performance and quality of the cooling system elements. Let's take a quick look at each of them.

Cooling radiator

Coolant boiling can be caused by a clogged radiator and clogging both inside and outside.

The engine cooling radiator is clogged with honeycombs.
Regular radiator cleaning will ensure proper engine operation and help prevent antifreeze from boiling. When checking the condition of the radiator, we pay special attention to the presence of leaks and the integrity of the honeycombs, the absence of cracks in the tanks and the condition of the pipes.

water pump

The water pump is responsible for the complete circulation of coolant through the cooling and heating system.

Antifreeze leaking from under the pump.
Maintaining normal operating temperature of antifreeze also depends on the efficiency of the pump. Major pump failures include bearing failure, leaks, and pump impeller failure.

This can occur both due to physical damage to the impeller and due to cavitation processes. Cavitation often occurs due to the use of low-quality antifreeze or its premature replacement.

Thermostat

Most complaints are directed at the thermostat, a bypass valve that directs the coolant in a full or small circle, depending on the degree of heating.

Thermostat location under the hood.
For example, the engine may not warm up to the permissible 87-90 degrees due to a stuck valve. However, very often thermostat malfunctions occur due to the quality of the thermoelement. Although every thermostat has a marking on the body indicating the valve's response temperature, the stated temperature is not always the actual temperature.

So, at the specified operating temperature of 85 degrees, the thermostat can pass liquid in a wide circle even when it is heated to 75-80 degrees. As a result, the temperature will not correspond to the norm, the engine will not be able to warm up to the optimal value. The only remedy is to test the thermostat before installation. To do this, the thermostat body is placed in a container of water and heated to a given temperature, periodically checking the condition of the valve. A discrepancy between the thermostat response temperature, even by 3-5 degrees, will not allow you to obtain the optimal operating temperature while driving.

Sensors, ECU firmware and fan

The accuracy of the coolant temperature sensor also greatly affects operating temperature.

The temperature sensor is located next to the thermostat housing.
The sensor sends an electrical impulse to the electronic control unit, which in turn commands the cooling fan to start. The normal temperature at which the fan should start is 105 degrees. If the sensor readings are incorrect, the fan will start earlier (in which case the antifreeze will not heat up normally) or later. Then the engine may overheat and antifreeze, especially low-quality antifreeze, may boil.

DTOZH malfunction

If the fan does not turn on at 90-95 degrees or turns on later than necessary, this may indicate a failure of the DTOZH. The sensor is inexpensive and breaks often, so you should always keep a spare part in the glove compartment. The DTOZH is also located to the right of the cylinder block, identified by a chip with three wires. When replacing the sensor, you need to make sure that the wires are intact: their breakage can also cause overheating.

We recommend: Recommendations for replacing spark plugs on a VAZ 2114

Operating temperature of VAZ 2110: diagnostics and replacement of the coolant temperature sensor

Drivers who regularly drive on country roads often see the following picture: a passenger car is standing on the side of the road with the hood raised, steam coming out of the engine compartment. The most common cause of this situation is the temperature sensor. In one case, the motorist himself was to blame for the breakdown; he did not notice the increase in temperature, and in the other, the electronic element was worn out. The coolant sensor (DTOZh) rarely fails, but if it does, then urgent replacement is required. After studying this material, the reader will learn what the operating temperature of the engine is, why the VAZ 2110 engine warms up, how to check the DTOZH and how to replace / install a new element in the car where the injector is located. This happens if you do not notice a malfunction of the engine temperature sensor in time.

Features of the VAZ injector cooling system

Cooling in cars 21093,2109,21099 is liquid, but you need to understand that the radiator is cooled by the flow of incoming air and a fan, which increases the cooling intensity. Also, part of the heat is removed by the car's interior heater radiator at low temperatures.

The expansion tank is designed to compensate for the volume of liquid when heating, to top up and control the level of antifreeze.

The thermostat system provides temperature control, preheating of the VAZ engine, initial heating of the interior in winter, and only then ensures the inclusion of a large cooling circuit.

The temperature sensor provides control of the cooling system, allows you to monitor the engine temperature and regulate the operation of the fan.

The entire operating cycle of the cooling system is controlled using a power unit control system that takes into account all temperature parameters. It determines the optimal switching conditions and operating time of the structural elements of the system.

Diagnostics using ODB-2 scanner

The general technical condition of the car can always be checked using a personal diagnostic car scanner. Among the options available on the market, we recommend paying attention to the Korean-made Scan Tool Pro Black Edition scanner. This model is perfectly compatible with most domestic and foreign cars.

A special feature of the device is full automatic diagnostics. Unlike analogues, this auto scanner is capable of diagnosing not only the engine, but also ABS, gearbox, transmission, airbag, air conditioning system, etc. All gauges, oil pressure, temperature and much more are available.

Airlock

In addition, air blockages in the cooling system can severely interfere with coolant circulation.

A plug can occur after the liquid boils, as well as due to improper replacement of antifreeze or depressurization of the system. As a rule, air is removed from the cooling system through the throttle body pipe, as the highest point of a closed cooling system. After removing the plug, the motor will heat up to the nominal temperature and will not overheat.

Air is removed through the throttle tube after the engine warms up to operating temperature.

What can be dangerous about a cold engine?

If you notice that the engine has not warmed up to operating temperature and it cannot rise, then you should start immediately troubleshooting, as the consequences can lead to serious expenses for repairs.

The electronic control unit installed on modern cars recognizes an unheated engine as a cold one. If it cannot warm up and the engine temperature does not rise, then an over-enriched mixture is supplied.

When the system has to operate in this mode, the spark plugs fail due to the appearance of carbon deposits on them and on the internal elements. Thus, you can significantly reduce the service life and face major repairs, which cost a lot of money.

If the engine does not warm up to operating temperature, you should immediately contact a car service to diagnose the problem so that similar malfunctions do not occur in the future.

Sensor check

You will need a multimeter for the test. The coolant temperature sensor is checked as follows:

1. The product is removed from the vehicle (the process is described in the removal and installation instructions in the next section). Next, you need to prepare a container completely filled with coolant;

   
   Diagnostics of the coolant temperature sensor disassembled using a multimeter

2. Now you need to heat the container and place the coolant sensor inside, which was previously connected to the multimeter. The important point is that you need to know the temperature in the container to determine whether the item is healthy or not. The table will help with this. For example, if the tank temperature is 40°C, the resistance should be around 1459 ohms;

   
   Table for determining liquid temperature using multimeter readings

3. If the operating temperature does not match the resistance (or vice versa), the element is faulty and requires replacement as it cannot be repaired. If the deviation is small, simply clean the sensor surface - this may solve the problem.

What does an increase or decrease in this indicator lead to?

If the temperature drops below this norm, the engine will lose power and dynamics. As a result, the car will have a harder time picking up speed and consume more fuel. Especially often, a decrease in normal values ​​occurs in winter, if the power plant is not warmed up enough or if the stove malfunctions. It is important to maintain the engine regularly to avoid this situation.

In summer, leaving the operating temperature range is more dangerous, especially if the engine overheats, which happens extremely often this season.

An increase in temperature leads to boiling of liquids in the engine, which causes irreparable damage to it.

The main problem with the engine reaching operating temperatures is related to changes in the properties of the oil:

• as it decreases, it becomes more viscous;
• when increasing liquid.

Engine temperature drops while driving

Experts strongly recommend that you inspect the car before your trip. Such visual diagnostics help to identify various deviations in its operation, allowing them to be quickly eliminated.

Particular attention should be paid to the indicators of the main systems, one of which is the operating temperature of the machine’s engine. It appears on the dashboard as a small arrow. Mostly, motorists are faced with overheating of the power unit. Reverse deviations often occur when the driver notices that the engine temperature drops while driving.

Dismantling and installation of a new element

Before changing the fan switch sensor, it is necessary to remove all working fluid from the car radiator. After this, you can proceed to replacing and installing a new VAZ 2110 injector element to turn on the fan:

1. It is necessary to disconnect the negative terminal from the battery - this will protect against a short circuit that may occur during dismantling of the electronic element;
2. Next, you should disconnect the wire block, as shown in the photo:

Important point! There is a sealing gasket on the DTOZH body. When removing the DTOZh, you need to make sure that it does not fall into the hood. A gasket may be needed when installing a new sensor, since the gasket may not be included in the DTOZH kit.

The engine temperature arrow does not rise, the engine temperature fluctuates, the engine cools down while driving

The time required to warm up the engine to operating temperature may vary for each unit being serviced. This is due to the fact that heating and its intensity depend on a number of conditions. The heating rate can be affected by the brand of the engine, its type (gasoline / diesel), the general condition of the cooling system, the quality of the filled air, the outside temperature, the degree of load while driving, the intensity of the heater in the cabin, etc.

We add that many experts agree that different types of motor oils and their viscosity can also affect overall engine heating, albeit slightly. The operating temperature of the oil in a conventional engine is about 100-150 degrees, not exceeding the maximum threshold of about 200 degrees (all indicators are averaged). At the same time, the maximum oil temperature in the engine is determined by the flash point of the oil, its coke, etc.

It may seem that the temperature range for different oils is the same, but this is not the case. Packages of special additives that reduce friction losses, the base itself () affects the degree of heating of the oil. In other words, oils with low viscosity cool friction pairs better, but the lubricant itself heats up more. It turns out that with different engine oils, the temperature in the crankcase of the same engine can differ by 5-7 degrees. If we take these characteristics into account, we can assume that with “liquid” synthetics the engine will not only be easier to start in winter, but will also warm up faster.

So, let's return to the cooling system. A cold engine and a non-working heater in most cases are the consequences of malfunctions. If you notice that the power unit heats up for a very long time, the engine does not warm up to operating temperature, then you should start checking with this device.

The thermostat allows heated coolant to enter the radiator. This circulation through the radiator is called the great circle. The thermostat opens strictly at a certain temperature on different internal combustion engines (on average about 90 degrees Celsius), that is, up to the specified value, the liquid circulates only in a small circle. Problems begin when the thermostat stops opening or closing in a timely manner. If it does not open, the engine will overheat. If the thermostat is always open, the antifreeze will constantly circulate only in a large circle, and the engine will not heat up to operating temperature.

How to flush the cooling system of a VAZ 2109

You can rinse the cooling system with ordinary boiled (!) water. Boiled, because this way we minimize the amount of salts and minerals in the water that will remain after flushing in the system. Flushing the system is easy. The old fluid is drained, boiled water is poured in, the engine is allowed to idle for 15-20 minutes, after which the water is drained.

This method is ineffective, but very cheap, because water is practically free. If the owner does not spare 300-500 rubles for a special means for flushing the system, then the effect of the procedure will be a hundred times higher. The fact is that these flushes contain substances that carefully and carefully remove scale and coolant decomposition products. And this is a truly effective flush. For example, liquid for flushing the BBF system costs about 300 rubles per flush. After washing, even plaque is removed; the main thing is to strictly follow the instructions.

Let's sum it up

In this article, we looked at one of the most common reasons why the engine does not heat up, may cool down while driving, the engine temperature does not exceed 70 degrees, etc. Thermostat previously set to cold. In parallel with this, other malfunctions of the cooling system may occur, as a result of which the internal combustion engine does not heat up.

It should also be noted that repairing the device is impractical due to its relatively low cost. For this reason, instead of descaling the thermostat and trying to clear the jam, it is better to immediately install a new element on the machine.

Cooling system VAZ 2109 injector

The cooling system of the internal combustion engine appeared almost simultaneously with it and has not undergone any significant changes since then. This primarily applies to long-lived domestic cars that will outlive you and me. Therefore, we need to know their design by heart if we do not plan to change to something more modern. The VAZ 2109, like the eight, is also considered one of the domestic eternal cars, for which there is no alternative. Today we will dive into the uncontested, ancient, like the trachea of ​​the first amphibians, cooling system of the first front-wheel drive vehicles. Nines, and identical engines with an injector.