Vaz 2111 causes engine to heat up. Checking the cooling system. Vehicle cooling system

At the first signs of overheating, if the arrow of the temperature gauge has gone into the red zone, but steam does not escape from under the hood, turn on the maximum heating mode of the passenger compartment (see "Automatic heater control system"). This is necessary in order to reduce the temperature of the coolant in the engine cooling system.

Turn on the hazard warning lights, depress the clutch pedal and, using the vehicle's inertia, try to move carefully to the edge of the carriageway and stop as far to the right as possible at the curb, and if possible outside the carriageway. Run the engine at normal idle speed for a couple of minutes with the heater on at full power.

WARNING
Do not stop the engine immediately! The only condition is to maintain the tightness of the cooling system. If the hose bursts or comes off, or if any other leak occurs besides fluid escaping from the expansion tank plug, the engine must be stopped immediately!

After stopping the overheated engine, local overheating of the coolant begins in the places of its contact with the most heat-stressed engine parts and the formation of steam locks. This phenomenon is called heatstroke.

1. Stop the engine.

2. Open the hood and inspect the engine compartment. Determine where the steam is coming from. When inspecting the engine, pay attention to the presence of coolant in the expansion tank, to the intact rubber hoses, radiator, thermostat.

WARNING
Never open the expansion tank cap directly. The liquid in the cooling system is under pressure, when the plug is opened, the pressure will drop sharply, the liquid will boil and its splashes can scald you. If you want to open the expansion tank cap on a hot engine, first put a thick thick cloth on top and only then carefully unscrew the cap.

USEFUL TIPS
The expansion tank plug valve plays an important role in ensuring optimal temperature conditions. It maintains an overpressure in the system of at least 0.1 MPa (1.1 kgf / cm2). In this case, the boiling point of water rises to 120 ° С, and antifreeze - up to 130 ° С. Unfortunately, when the valve is jammed in the closed position during overheating, a significant excess of excess pressure occurs - more than 0.2 MPa (2 kgf / cm2), which can lead to rupture of the expansion tank or breakdown of one of the hoses.

3. Look under the dashboard from the front passenger side and find out if there are any leaks or traces of coolant leaking from the heater radiator underneath.

If coolant leaks are found, the burst hose can be temporarily repaired with adhesive tape.

HELPFUL ADVICE
Reinforced (usually silver-colored) adhesive tape, which can be obtained from auto dealerships, is especially suitable for this purpose.

The leakage of a radiator, thermostat or heater is quite difficult to eliminate on the spot, therefore, in such a situation, it is necessary to add water to the cooling system and carefully monitor the temperature indicator while driving, periodically restoring the level in the cooling system.

WARNINGS
Long-term use of water instead of antifreeze leads to the formation of scale in the engine cooling system, deterioration of its cooling and, as a result, a reduction in the resource.
Never add cold water to an overheated engine. The engine must cool down with the hood open for at least 30 minutes.

4. The engine may overheat if the thermostat fails, which regulates the flow of fluid in the cooling system through or past the radiator (to accelerate the warm-up of a cold engine). To check the thermostat, you need to check the temperature of the hose connecting the thermostat housing to the radiator on a warm engine by touch. If the hose is cold, the thermostat is faulty, there is no circulation through the radiator.

5. Very often the cause of overheating of the engine, the cooling system of which is equipped with an electric fan, is a fan failure. Start the engine, monitor the temperature and pay attention to whether the cooling fan turns on when the engine overheats.

6. If the fan does not turn on, the fuse may be blown, the ON relay is faulty, the motor is blown, or the wiring is faulty.

7. Check the integrity of the wiring, the reliability of the connection of the electrical connectors.

8. If the wiring is okay, check the fuse and replace if defective.

9. If the fuse is good, try replacing the fan relay.

11. If the electric motor starts to work, the wiring is faulty; if not, the wiring or the motor itself is also faulty. The relay and the electric motor are not repairable, replace them as an assembly (see section 9 "Electrical equipment").

NOTE
It is allowed to drive to the place of repair with an electric motor connected directly to the battery. On arrival, do not forget to disconnect the electric motor from the battery, otherwise it will lead to battery discharge.

Engine overheating is not uncommon for a car such as the VAZ 2110. This problem is mainly encountered in cars with high mileage. Although it is not worthwhile to exclude motor overheating in relatively new specimens.

The mileage is often the culprit. As the vehicle is used, the parts wear out, the systems gradually become unusable.

Common Causes

As you know, the VAZ 2110 is equipped with two types of engines - with 8 and 16 valves. There are several main, most common reasons due to which this very overheating of power units occurs.

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

Low coolant level

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

Related material:

In a normal situation, the level of the cooling solution should be at the level of the MAX mark on the tank body. This indicates that the container is approximately 50-60 percent full.

If there is no such mark on the tank, be guided by the clamp. The liquid should reach its top edge.

1. If the engine overheats, just try to top up the missing amount of coolant so that it is at the optimal fill level.
2. If you have not changed the coolant for a long time, it is better not to add fresh coolant, but simply replace it completely with a new coolant.
3. Choosing between antifreeze and antifreeze, most VAZ 2110 owners prefer the first. Moreover, mainly due to the financial availability of antifreeze. But in practice, antifreeze is better... Its one of the most important advantages is that the substance does not freeze in severe frosts. For individual regions of our country, this is a key factor in the choice of coolant.

Thermostat

Another cause of motor overheating is a stuck thermostat valve. If it remains in the closed position and does not open, the coolant will only move along a small circuit. As a result, this will lead to strong heating of the power plant. Overheating itself threatens very, very serious consequences.

Such a malfunction can manifest itself at the most inopportune moment - on the way. You are unlikely to be able to carry out high-quality repairs on the side of the road... But you can try one method - knock on the thermostat housing. Often this allows the device to return to its working capacity for a while. This will help you get to your own garage or the nearest service station. There, the thermostat is already being replaced with a new one. It makes no sense to repair it. If he failed once, the situation will certainly repeat itself soon.

Related material:

temperature sensor

A temperature sensor is required in order to react to changes in motor heating... When the set point is reached, the sensor is triggered and turns on the cooling fan.

In the event of a malfunction of this device, the power unit overheats, since the fan is not activated. Consequently, the temperature does not drop below critical levels, but continues to rise gradually.

Related material:

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

Accelerate on a free stretch and then start braking with the engine. So the temperature will drop, overheating will not occur. Under no circumstances should the car be regularly operated in this way. But this is a great way to get to a garage or car service, determine the cause of a sensor malfunction, and then replace it.

Cooling Fan

The symptomatology of fan malfunctions is similar to a non-working temperature sensor. That is, the engine will warm up, the pointer on the dashboard will be in the red zone.

Coolant overheat alarm

Most cars are equipped with a temperature sensor that measures the operating temperature of the engine. If the overheating alarm comes on while driving (or the temperature indicator arrow goes into the red danger zone), this means that the coolant temperature is between 120 ° C and 126 ° C. This temperature is still below the boiling point of the coolant (assuming that the cooling system and radiator pressure cap are in good working order). If the coolant overheat signal comes on, do the following:

Step 1. Turn off the interior air conditioner and turn on the interior heater. This will help remove excess heat from the engine faster. Set the fan to maximum speed.

Step 2. If possible, turn off the engine and let it cool down (this may take over an hour).

Step 3. Under no circumstances try to remove the radiator pressure cap until the engine has cooled down.

Step 4. If the overheating alarm is on, you must not continue driving or the engine could be seriously damaged.

Step 5. If the engine does not burn with heat and is clearly not overheated, then it is possible that the problem is related to a malfunction of the temperature sensor or temperature indicator. Then you can continue driving, but for reassurance, you need to stop from time to time to check if there are signs of engine overheating and if there are traces of coolant leakage.

COMMON CAUSES OF ENGINE OVERHEATING

Low coolant level.

Clogged, dirty, or blocked radiator.

Faulty fan clutch or faulty electric fan.

Incorrectly set ignition timing.

Low oil level in the engine lubrication system.

Broken fan drive belt.

Defective radiator seal.

Freezing of the coolant (in frosty weather).

Defective cooling water pump

(slippage of the impeller on the inner shaft of the pump).

The owner complained that the engine of his car was overheating, but this only happens when he is driving on the freeway at high speed. The car was equipped with an engine that worked flawlessly when driving in an urban cycle.

The mechanic flushed the cooling system and replaced the radiator sealed plug and water pump, believing that the cause of overheating was a decrease in coolant flow in the cooling system. In the course of further verification, it was revealed that when the engine was cranked with the starter with the spark plugs unscrewed, coolant was sprayed out of one of the cylinders. The problem was resolved after the cylinder head gasket was replaced. Obviously, the leakage caused by a defective gasket was not large enough to cause a malfunction of the engine - as long as the speed and load on the engine did not increase so much that the increase in coolant leakage and heat generation caused by them did not lead to a rapid increase temperature.

The mechanic also replaced the oxygen (0 2) sensor, because the composition of the coolant contains organosilicon compounds and silicates, which, once on this sensor, usually poison it. Sensor degradation may have contributed to this problem.

Figure: 7.42. In the mid-1980s, many manufacturers began to use multi-ribbed belts (V-ribbed belts instead of transverse teeth). Older water pumps will fit the engine, but they may turn out to rotate in the opposite direction of what they should. This can cause the motor to overheat after replacing the pump. If you install a fan of the wrong type, then the angle of attack of its blades will not correspond to that required to create the necessary air flow through the radiator

For proper operation of the cooling system, the condition and correct installation of the drive belt is essential. The tension of the drive belt has a decisive influence not only on the operation of the water pump, but also on the alternator, air conditioning compressor and other belt-driven units. When replacing the belt or adjusting its tension, it is imperative to measure the belt tension using a belt tension meter in order to check that it exactly matches the required one.

Materials: http://vaz-rukovodstvo.ru/2110/peregrev-dvigatelya.html

Engine overheating is not uncommon for a car such as the VAZ 2110. This problem is mainly encountered in cars with high mileage. Although it is not worthwhile to exclude motor overheating in relatively new specimens.

The mileage is often the culprit. As the vehicle is used, the parts wear out, the systems gradually become unusable.

As you know, the VAZ 2110 is equipped with two types of engines - with 8 and 16 valves. There are several main, most common reasons due to which this very overheating of power units occurs.

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

Tens engine

Low coolant level

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

In a normal situation, the level of the cooling solution should be at the level of the MAX mark on the tank body. This indicates that the container is approximately 50-60 percent full.

If there is no such mark on the tank, be guided by the clamp. The liquid should reach its top edge.

1. If the engine overheats, just try to top up the missing amount of coolant so that it is at the optimal fill level.
2. If you have not changed the coolant for a long time, it is better not to add fresh coolant, but simply replace it completely with a new coolant.
3. Choosing between antifreeze and antifreeze, most VAZ 2110 owners prefer the first. Moreover, mainly due to the financial availability of antifreeze. But in practice, antifreeze is better... Its one of the most important advantages is that the substance does not freeze in severe frosts. For individual regions of our country, this is a key factor in the choice of coolant.

Thermostat

Another cause of motor overheating is a stuck thermostat valve. If it remains in the closed position and does not open, the coolant will only move along a small circuit. As a result, this will lead to strong heating of the power plant. Overheating itself threatens very, very serious consequences.

Such a malfunction can manifest itself at the most inopportune moment - on the way. You are unlikely to be able to carry out high-quality repairs on the side of the road... But you can try one method - knock on the thermostat housing. This often allows the device to return to its working capacity for a while. This will help you get to your own garage or the nearest service station. There, the thermostat is already being replaced with a new one. It makes no sense to repair it. If he failed once, the situation will certainly repeat itself soon.

Thermostat in the engine

temperature sensor

A temperature sensor is required in order to react to changes in motor heating... When the set point is reached, the sensor is triggered and turns on the cooling fan.

In the event of a malfunction of this device, the power unit overheats, since the fan is not activated. Consequently, the temperature does not drop below critical levels, but continues to rise gradually.

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

Accelerate on a free stretch and then start braking with the engine. So the temperature will drop, overheating will not occur. Under no circumstances should the car be regularly operated in this way. But this is a great way to get to a garage or car service, determine the cause of a sensor malfunction, and then replace it.

Cooling Fan

The symptomatology of fan malfunctions is similar to a non-working temperature sensor. That is, the engine will warm up, the pointer on the dashboard will be in the red zone.

Again, on the way, we recommend using the engine braking method. Next, head to the garage. Let the machine cool down. In the meantime, go to the store for a new fan. This device for the VAZ 2110 costs about 600 rubles.

Fan problems

Other reasons

There are other equally popular reasons for engine overheating. Therefore, we suggest that you familiarize yourself with all of them according to our table.

Coolant level too low

Top up coolant to the desired level, focusing on the risks or the clamp on the expansion tank

Clogged or blocked radiator

Flush the radiator. If this does not help, the unit must be replaced

The cooling system pump is out of order (the impeller slips on its inner shaft)

It is best to replace the pump

Oil level in the lubrication system is critical

Add oil to the required level. If old, change oil

Incorrectly set ignition timing

Perform torque adjustment

Thermostat is out of order

Replace the device with a similar new one

The cooling fan motor is out of order

It is subject to repair, but it is better to install a new motor

Faced with such a phenomenon as engine overheating, do not rush to send your VAZ 2110 to a car service for repair. You can find many reasons for overheating with your own hands, and also cope with them yourself. Service station services are not cheap these days, unfortunately.

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All about 2109

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It's no secret that the engine is the main unit of the entire car. Your ability to drive a car, consume the optimal amount of fuel and more depends on its performance. But overheating is a very common situation in which many make serious mistakes.

Repair of the exhaust manifold on a VAZ 2109 (carburetor)

The exhaust manifold is a component of the exhaust system that carries out the process of diverting exhaust gases from the cylinders of the power unit to the exhaust pipe.

Materials: http://luxvaz.ru/vaz-2110/153-greetsya-dvigatel.html

Post has been edited. ich: 10/04/2006 - 22:10

Everything is clear here, either there is or not, if not, or in few shares.

On a hot engine, touch the radiator temperature with your hand, if the thermostat is cold, change it. If it's hot, touch the inlet and outlet hoses and shake them like a pear.

There is a thin hose in the expansion tank, when you press the gas, antifreeze should pour out of it (quite abundantly) into the tank, if this does not happen with a pump for replacement.

ZY First of all, change the temperature sensors (there are 2 of them), you will change them, buy in Cars on Ostrovsky in the "imported spare parts on our brand" department. I had such a buggy one of the sensors.

So in my opinion it works for you correctly !!!

You can also see what color you have antifreeze, if there is a lot of rust in it, then you need to rinse it, otherwise there will be problems, it may already be !!!

There are special means for flushing the cooling system.

If necessary, I will explain. Write in a personal!

The car is 5 years old, everything was OK and suddenly it began to overheat. It comes to the point that the food is 90-100 and the temperature is about 110 degrees and the fan is working.

after the thermostat all pipes are hot.

Change the thermostat anyway?

Post has been edited miracle: 17.05.2007 - 11:15

Yes, change. He jammed in a half-open state. There is simply not enough circulation through the radiator.

Everything will pour out from the head.

The pump pumps (antifreeze comes from the steam pipes)

And maybe someone else has a picture of the thermostat assembly 21082-1306010

Change the coolant at the same time

If there is an injector, then the hardware can be used to lower the temperature on the vent.

added in 1179475829

Attached Images

Post has been edited miracle: 18.05.2007 - 16:07

Up to 95 degrees, the branch pipe G is hot. X-cold. All other pipes are hot. After 95 degrees, X becomes hot too.

How did you determine at what temperature the thermostat valve opens? The murzilka says that the valve should open when the coolant temperature is between 87-92 degrees. Therefore, in this case, it depends on the accuracy of your measurements whether it is necessary to dig the thermostat further, or whether it is in order.

Materials: http://teron.ru/index.php?showtopic\u003d92066

Despite the fact that such a car is characterized by high reliability, after 10 years of service life, individual components begin to malfunction. When the VAZ 2110 injector of 8 valves is heated, the reason lies in the cooling system. The temperature sensor indicates an excess of the engine heating rate.

The main causes of overheating

The classic cooling scheme consists of a large and a small circuit through which the antifreeze circulates. The thermostat performs a regulating function, directing the liquid in the desired circle. It is cooled in a radiator made of aluminum. A fan built into the system turns on when the car is running at low speeds, helping to maintain the required degrees.

When the engine of a VAZ 2110 heats up, the reason lies in the following faults:

• the thermostat is broken;
• the fan is out of order;
• an air lock has formed in the cooling system;
• insufficient coolant level;
• boiling antifreeze;
• dirty engine.

Each of these reasons can become the main reason why the VAZ 2110 engine begins to overheat. As a result, the machine loses power.

Faulty thermostat

If the VAZ 2110 injector of 8 valves is heated, the reason may lie in a faulty thermostat. The node is jammed. As a result, the circulation of the liquid stops at any temperature. Often such a breakdown is caused by the fact that the VAZ 2110 car heats up for a long time at idle speed. The time of such heating should not exceed 10 minutes. It is allowed to move the car immediately after switching on, provided that the first few kilometers it will be given a gentle mode.

Thermostat: 1-way valve; 2-outlet branch pipe (to the pump); 3-spring of the main valve; 4-main valve; 5-piston holder; 6-piston; 7-entrance part-cupboards (from the radiator); 8-rubber insert; 9-solid heat-sensitive filler; 10-spring of the bypass valve; 11-inlet (from engine).

The thermostat can be checked directly on the engine. The order of work is as follows:

1. The engine starts.
2. The instrument arrow starts moving up.
3. The radiator pipes located under the hood, top and bottom, are checked. If the lower one becomes warm before the start of the movement of the arrow of the device, it means that the thermostat is stuck in the open position. When it is permanently closed, the bottom nozzle remains cold at any temperature.

You can also check the thermostat with its dismantling and understand why the VAZ 2110 engine is heating up 8 valves . For this, the device is removed from the engine and placed in a container with water. This can be any saucepan that is put on fire. After the liquid boils, the valve should open. If this does not happen, then the node is jammed. It cannot be repaired. Its replacement is required.

If the VAZ 2110 injector of 8 valves is heated, the reason may lie in the idle fan. This is a car unit, whose function is to cool the liquid in the radiator. A signal is sent to turn on the electric motor by a sensor. This happens when the temperature exceeds the permissible threshold.

If the fan is out of order, then the VAZ 2110 car with the injector starts to warm up for the following reasons:

1. The thermostat valve is stuck. The coolant will constantly circulate only in a small circle, without entering a large one. The antifreeze will stop flowing into the radiator and will not reach the temperature sensor. As a result, the antifreeze will begin to boil.
2. When the VAZ 2110 engine starts to warm up quickly, the reason may lie in the faulty drive of the fan itself. For testing purposes, it is connected directly to the battery. If it does not turn on, then the drive needs to be repaired.
3. Before checking the actuator, the fuse must be inspected. Its brand is F-7. The operation of the element is checked with a multimeter. The burned-out part is replaced with a new one.
4. Fan relay failure. To get to it, you need to remove the center console cover in the mounting compartment. The cooling relay is located on the left edge. It can be checked only by installing a new element. Then the VAZ engine warms up and the new part is monitored.
5. A break in the wiring will turn off the fan. The break point is found using a tester. A new wire is being laid in this section.

Air lock in the cooling system

When the antifreeze boils in the expansion tank of the VAZ 2110, the reason may be an airlock.

Cooling system of the VAZ-2110 engine (with carburetor): 1 - heater radiator; 2 - heater radiator steam outlet hose; 3 - outlet hose; 4 - supply hose; 5 - coolant temperature sensor (in the block head); 6 - hose of the pump inlet pipe; 7 - thermostat; 8 - filling hose; 9 - plug of the expansion tank; 10 - coolant level indicator sensor; 11 - expansion tank; 12 - outlet pipe; 13 - liquid chamber of the carburetor starting device; 14 - radiator outlet hose; 15 - radiator supply hose; 16 - radiator steam outlet hose; 17- left radiator tank; 18 - sensor for turning on the electric fan; 19 - fan motor; 20 - electric fan impeller; 21 - the right radiator tank; 22 - drain plug; 23 - casing of the electric fan; 24 - toothed belt of the timing mechanism drive; 25 - impeller of the coolant pump; 26 - supply pipe of the coolant pump; 27 - supply hose to the liquid chamber of the carburetor starting device; 28 - outlet hose.

It appears for the following reasons:

• replacement of the coolant was carried out in violation of technology;
• in case of engine overheating;
• when the system is depressurized.

To eliminate the reason due to which the VAZ 2110 engine heats up, you need to remove the plug from the system.

This is done in several ways:

1. The cover of the expansion tank opens. We are looking for two hoses that lead to the radiator. They are placed at different heights. Sharply pressed on them, in order to remove air. The cover is replaced and the car starts.
2. The car is installed on a hill. The front of the machine looks up. The steeper the slope, the better. The engine starts and 2-3 minutes. idling. If this does not work, then the procedure is repeated. In this case, several re-gasings should be made. After that, antifreeze is poured to the required level.
3. The most effective method of removing the plug is to disconnect the fluid return hose. For this, the clamp is loosened and the hose is removed from the fitting. If the liquid does not flow, then the plug is present. After that, antifreeze begins to pour into the tank. This is done until it appears in the hole in the hose. If this does not happen, the engine starts and fluid is expected to appear. As soon as she runs, this indicates the elimination of the airlock.

Insufficient coolant level

The reason why the VAZ 2110 injector of 8 valves is heated is often an insufficient level of antifreeze in the barrel. This happens due to fluid leakage. The reasons lie in the wear of the rubber pipes in the system. Despite the stability of the material, it loses its properties over time. Antifreeze begins to flow through the cracks. A drop in the liquid level causes a rise in temperature. As a result, the antifreeze at the VAZ 2110 boils and splashes out of the expander plug.

Sometimes the problem lies in the tank itself. It is not always manufactured in accordance with the technology. If the walls are thin, then there is a possibility of cracking on the surface. Sometimes the reason lies in a poor-quality traffic jam. Chips on the threaded part create a leaky connection.

Boiling antifreeze

If the antifreeze boils in the expansion tank of a VAZ 2110, the reasons may be as follows:

1. Fluid enters through the head gasket. Traces of antifreeze are clearly visible on the dipstick. There is also a gas smell coming from the expansion tank. An urgent need to change the gasket.
2. Poor quality antifreeze. Dilution of the concentrate with water should only be done by the manufacturer. Self-addition may lead to incorrect concentration.
3. Loss of antifreeze properties. This happens after 2 years of operation of antifreeze. It becomes oily, changes color. The fluid must be replaced.

If the VAZ 2110 8-valve injector boils, then the cause is a dirty engine. After a long run, a film of oils forms on the metal. When the car is moving, dust gets under the hood, which together with the oil film forms a dense layer. As a result, blowing air over the engine is ineffective.

To solve this problem: keep the engine clean. All connections are constantly checked and, if necessary, sealed. The radiator is often clogged with dirt, which stops letting air through. At times it needs cleaning.

If the engine in a VAZ car starts to warm up, you should know that there are main causes of the malfunction. With a sharp heating, the thermostat valve may be stuck. When such a problem exists for a long time, the fault must be looked for in the system itself. This may be clogging, the presence of an air lock, or a problem in poor-quality antifreeze.

Engine Flush Tests

Each car owner was faced with the fact that the 16-valve VAZ-2112 engine began to warm up. If you look at the indicator of the dashboard, then the arrow tends to the red zone, and liquid boils in the expansion tank - this means that there is a malfunction in the cooling system.

The temperature indicator arrow has entered the red zone, which means the engine is in a state of overheating

Many motorists remember the reasons for the effect on the old Zhiguli. On 16-valve engines, the reasons for this effect are almost the same. Consider what reasons can serve as the main power unit begins to heat up above normal:

• Clogged system.
• Thermostat jammed.
• Damage to the pump. Replace pump. ...
• Radiator.
• Cooling sensor malfunction.
• Cooling fan not working (see ")".

All these problems can cause engine overheating.

Elimination methods

To eliminate the causes of engine heating, it is necessary to establish the epicenter of the effect. To do this, it is worth checking each node sequentially. After identifying the problem, it is worth finding the exact cause and fixing it. So, consider the sequence of actions.

Engine cooling system diagram

Radiator and pipes

One of the reasons for engine overheating can be the clogging of the radiator and pipes, which affects the circulation of fluid in the system, and can also lead to cracks in the pipes and breakdown of the radiator, which will lead to the leakage of coolant.

With an insufficient amount of coolant in the system, the power unit will heat up faster and cool down for a long time, and the cooling fan will run almost continuously.

Radiator and cooling system pipes

The method for solving the problem is quite simple - dismantling the radiator from the system and cleaning it both outside and inside.

The second step will be to inspect the pipes for leaks and replace worn out products. As practice shows, many motorists install Kit-kits (tuning versions) of the radiator and pipes to extend the service life of the cooling system.

Pump (water pump)

One of the main causes of overheating is the fact that water pump play ... It is quite easy to determine this malfunction, because a corresponding howl appears in the pump area. Also, a sign of a malfunction may be that liquid will flow from the pump shaft. The malfunction is eliminated quite easily - by replacing the water pump.

Water pump mounted on the engine

Thermostat

The thermostat is the first place to look for a malfunction.

So, for jamming of the thermostat on a small circle, the engine heats up more often usually, even when traveling on a highway, where there is enough oncoming air flow for the system to have time to cool itself.

Thermostat removed from the motor

There is one caveat when the thermostat should not be changed - if it fails in winter. Then, additional cooling is provided by sub-zero temperatures. Of course, if the thermostat fails in the summer, then to prevent overheating of the motor, it must be replaced as soon as possible.

Cooling sensor

The cooling temperature sensor is a harmless breakdown, which can lead to the fact that the indicator on the dashboard will show incorrect data, so the driver will not even know that the engine has overheated until it boils on the way.

Usually, this malfunction is accompanied by many associated factors, so it is quite difficult to miss it. There is only one solution to the problem - replacing the cooling system sensor and resetting errors that arose in the ECU.

Cooling sensor

Fan

The last reason for overheating, especially in the summer, is the cooling fan.

The fan under the hood is indicated by an arrow

So, a breakdown of this unit can lead to the engine overheating, as well.

In this case, the consequences can be very diverse, well, what needs to be checked for serviceability of the fan, as well as the sensor for turning it on - that's for sure. This part fails quite rarely, and therefore an elementary fuse or wiring malfunction, which can be easily eliminated, can become the cause of failure.

Consequences of untimely elimination of defects

Not all drivers are aware of the consequences of overheating the engine and continue to drive with a constantly running fan or frequent overheating.

So, the consequences of strong engine heating are divided into 3 stages, which should be considered separately.

Weak overheating

If the engine overheats for up to 10 minutes, the consequences may be minor. So, cracks will appear in the pipes of the cooling system, the valve and camshaft oil seals will melt. Also, the valves will burn out, and oil will enter the combustion chambers, which will be marked by the release of black smoke from the exhaust system.

Consequences of weak overheating, namely burnout of valves

Significant overheating

With significant overheating, deformation occurs, or rather deflection of the cylinder head. To eliminate these consequences, you will have to dismantle the cylinder head and give it to the surface groove. Thus, it turns out that the block head is subject to overhaul.

Severe overheating

With severe overheating, the walls of the cylinder block are deformed and burned out, while the piston group melts, the connecting rods are deformed or even the crankshaft breaks. Thus, the engine cannot be repaired, since the walls of the power unit usually collapse, and their restoration is impossible.

conclusions

The reasons for the heating and overheating of a 16-valve engine are established and methods of elimination are considered. So, untimely repair of this unit can lead to the fact that the engine will finally fail and will need to be replaced. Therefore, if the first signs appear that the cooling system has failed, it is necessary to find and eliminate the cause, since the replacement will come out, much more expensive.