Replacing the thermostat on a VAZ-2112 16 valves with your own hands (+ video)

How to Install a New Thermostat

If the best device for the VAZ-2110 has already been purchased, it’s time to start installation, especially since you can carry out the procedure yourself. You will need:

• gasket former - cost about 300 rubles;
• Cooling system cleaner – 150 rubles;
• pipes going to the stove radiator - 230 rubles;
• thermostat (in our case it’s Pramo) – 12,000 rubles;
• green antifreeze with a volume of 10 liters - up to 900 rubles;
• hairpin M8 at 70 m.

First you need to drain the used antifreeze. Place a 7-liter container under the drain hole and wait until the liquid is completely drained into the container. After this, you should clean the cooling system; for this it is best to use a special cleaning agent. Acids, soda and vinegar do not give such a good result, and lactic acid can ruin the internal parts of the car.

After pouring in the cleaning agent, add water inside and turn on the VAZ-2110 for 20 minutes. This promotes rapid detachment of contaminants and scale from the pipeline walls. The expansion tank should also be thoroughly rinsed. Now loosen the clamps of the hose coming from the radiator, then do the same with the clamps of the supply hose of the pump pipe and the hose that serves as the connecting element between the outlet pipe and the thermostat.

Remove the thermostat, install a new sample and repeat everything in reverse order. Don't forget to add coolant.

Symptoms and diagnostics

1. The first sign of thermostat failure is engine overheating. This situation occurs if the heat-sensitive plate does not open when it reaches 87 degrees, then the coolant turns into heating fluid. The motor does not cool properly and overheats.
2. When the bimetallic plate hangs in an intermediate position, the cooling system does not work properly: when the engine warms up, the temperature rises slowly, and when the vehicle is operated in difficult conditions, the engine boils.
3. If the valve is constantly open and the coolant constantly circulates in a large circle, then the engine runs cold. This translates into increased fuel consumption.

We change the thermostat on a VAZ-2114 with our own hands: principle of operation and replacement on video.
Primary diagnostics of the thermostat on a VAZ 2110 is carried out without removing it. The check is done with the engine just started. Lift the hood and touch the upper pipe leading to the radiator. It should be cold and stay that way until the 60-70 degree mark on the instrument panel. After the needle has exceeded 70 degrees, the pipe begins to warm up. If everything happens as described, then the thermostat is normal. In other cases, replacement is necessary.

More accurate and complete testing of the temperature-sensitive element is done using special equipment at a service station. If you have doubts about the correctness of self-diagnosis of the work, use the services of a service station.

It is not difficult to replace the temperature-sensitive element on the 2110 with your own hands, following the step-by-step instructions. To perform repairs, you need to prepare the following tools and materials:

• new thermostat. Check which one is installed on the car (collapsible or solid body);
• silicone sealant;
• new pipes if the old ones are worn out or microcracks appear on them;
• new metal clamps;
• paronite gasket for a new type body;
• container for draining antifreeze;
• open-end wrench 13;
• Phillips and straight screwdrivers;
• antifreeze;
• rags.

Toolkit in the photo

Rags Wrench for 13 Screwdrivers Sealant Clamps Cooling system pipes

Important! Replace the temperature-sensitive element on a completely cooled engine. Antifreeze heats up to 120 degrees and can cause burns

Step-by-step instruction

1. Place a container under the drain hole on the radiator. Open the tap and drain the antifreeze. There is no need for a complete drain; it is enough to reduce the level to the height of the temperature-sensitive element.
2. Move the coolant container under the engine in the area where the thermostat is located.
3. Remove the thermostat housing. If the car has an old-style heat-sensitive element, then to remove it, just loosen the clamps and disconnect the pipes. On the VAZ 2110 since 2003, the thermostat is attached to the engine with two nuts. To dismantle use a 13 key.

The housing is secured using pipes and metal clamps

Replace the temperature sensing element if a six-hole housing is used. Change the gasket between the housing and the motor. Wipe with a rag and degrease the body terminals and pipes from the inside. Apply silicone sealant to the inside of the pipes and to the thermostat terminals. Place the pipes and tighten the metal clamps.

Before installation, lubricate the terminals and the inside of the cooling system pipes with silicone sealant.

Add antifreeze to the cooling system through the neck of the expansion tank.

Installation video tutorial

To assess your strengths and understand the process of replacing the thermostat on the “ten”, watch the video:

Remember that replacing a faulty temperature-sensitive element on a VAZ 2110 cannot be postponed. If repairs are not carried out in a timely manner, a problem with the thermostat will lead to serious problems with the power unit and expensive repairs.

Instruction No. 1

It often happens that the engine temperature does not rise to the optimal temperature during operation. For example, on the body of a thermostat device, 90 degrees is marked, and the temperature is not higher than 85. This problem can be solved with the help of a simple modification - modifying the rod. The fact is that in the process of opening the thermostat, the rod rests against the cover. If you expand the special recess in the lid, the thermostat will operate later. Therefore, it is easier to replace the rod with a bolt of the appropriate size.

1. Pull the rod itself out of the cover.
2. Drill a through hole at 4.5.
3. Cut the internal thread to 5.
4. Select the bolt length with a margin.
5. Place a lock nut at 5 and a washer with an elastic band to seal.
6. Reinstall the thermocouple.
7. Fill with antifreeze.
8. Check in practice, adjust the beginning of the opening of the large circle to 89 degrees.

Now the temperature will remain 90-92 degrees, as stated on the thermostat housing.

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

Steering rack VAZ 2112 with steering wheel DIY repair video

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:

With my own hands. Checking and replacing the VAZ 2110 thermostat.

A burst radiator, of course, can be a pity. However, it’s even worse when the engine seizes due to such a seemingly trifle as a non-working thermostat. This is the brain center of the entire cooling and heating system; the thermostat determines how the engine copes with loads and how much fuel it consumes. How to properly check the thermostat on VAZ 2110-2112 engines, how to find a replacement, how to change it correctly and quickly with your own hands - we’ll figure it out right now.

How to replace the thermostat on a VAZ 2110-VAZ 2112?

Replacing the clutch cable of a VAZ 2109/2110/2112 with your own hands

Note! We will give you one piece of advice, it is recommended to replace this part only when the engine is cold, because if you decide to replace it on a hot engine, you will most likely get burned because when the engine heats up too much, the liquid also heats up, and if it gets on your skin, then this It may even cause burns, so be careful!

Removal: 1) At the very beginning of the operation, drain all the coolant from your car’s engine, otherwise you won’t be able to replace the thermostat normally, since you will have to disconnect the pipes from it that contain the liquid. (For information on how to drain the liquid, see the article entitled: “Replacing coolant in a VAZ”)

2) Then remove the air filter housing itself so that it does not interfere with further work. (For information on how to remove the housing, see the article: “Replacing the air filter housing”)

3) Then, when the liquid is drained and the body is removed from the car, pick up a screwdriver or a wrench (Depending on what type of hose clamps are attached that are connected to the thermostat) and use them to loosen the clamps of all hoses (Hoses should there are only two, namely the radiator hose and the coolant pump hose) which are connected to the thermostat and then disconnect them, by the way, you can also see both of these hoses in the photo below, they are shown with arrows.

4) Next, take the hexagon in your hands and use it to unscrew the three bolts that secure the thermostat cover itself, and after unscrewing, carefully remove it.

Note! The thermostat itself will be installed inside this cover; in the photo below it is indicated by a red arrow, so you remove it from the cover and thereby replace it with a new one!

By the way, there will also be a sealing ring installed on the thermostat cover (Indicated by a blue arrow), if it is heavily compressed or cracked, or simply damaged or broken, for example, then in this case replace this ring with a new one!

Installation: Installation of the new thermostat and all previously removed parts is carried out in the reverse order.

Additional video: If you need some advice on how to remove the thermostat and a little about the expansion tank, then watch the video below, which explains all the nuances that you will encounter when replacing this unit:

The other day I checked whether the thermostat was working or not, using this method which is described here, in the end I came to the conclusion that it works because all the hoses become hot when the engine warms up and when I press them again, I feel that there is liquid inside, but from Why is my car overheating, if not because of the thermostat, please tell me?

Hello Vladislav! And you add coolant at normal intervals, it doesn’t go away very quickly, because it’s possible that a hole has formed somewhere in the hose and through it air slowly enters the system and at the same time the liquid also pours out, and that’s why it’s possible your car is running so quickly and overheats. Also check the coolant level, if necessary, bring it to your normal level. It is also possible that you have an air lock in the system, which appears after the system is depressurized, that is, after replacing any part that is part of the cooling system and after replacing the coolant itself! (For information on how to remove an air lock, see the article entitled: “Removing an air lock in the cooling system”)

Note! Also, the engine may still be overheating because you have low-quality or too old coolant that needs to be changed from time to time! (For information on how to replace the fluid, see the article: “Replacing the coolant”!

Which thermostat is better to install on a VAZ 2110 injector

Until 2003, thermostats of the old design were installed on all VAZ 2110 engines. Its catalog number is 2110-1306010. After 2003, the thermostat was replaced and minor changes were made to the cooling system. In this regard, in dozens of later years of production, thermostats with article numbers 21082-1306010-11 and 21082-1306010-14 . The latter have a higher thermoelement response rate, so preference should be given to them. In addition, there are a huge number of non-original valves and thermostat assemblies on sale. Judging by the reviews of the owners, the valves and thermostats of these companies are considered to be of the highest quality:

• 92C 21082-1306010 , manufactured by LUZAR , the quality is unstable, but if you’re lucky, it will work well;
• assembled housing of the same company with five outlets with catalog number 92C 2190-1306010, LT 01081, without expansion tank fitting or LT 01084 with fitting;
• TN-LA21082 from AURORA;
• Pekar , article 21082-1306030 , good quality and average prices;
• Vernet , article number TH6595.85, one of the most inexpensive on the market;
• STARNER , article number S40 2112 ;
• Finwhale , T111 ;
• BAUTLER, 21082-1306010-11;
• MAHLE / KNECHT , catalog number TH 37 80 ;
• STARLINE , TS T035.92T, one of the best replacements for the original;
• Gates , proven quality, stable temperature, TH21992G1 .

Checking the thermostat in operating mode is carried out only with the valve removed from the vehicle. In principle, if the thermostat is visually coked, shows signs of wear or physical damage, it is better to replace it immediately. And to check it is necessary to remove the thermostat housing from the engine. To do this we do the following:

1. With the engine cooled down, drain several liters of antifreeze through the drain hole in the bottom can of the radiator. It is not necessary to drain all the liquid; it is enough to lower its level to the level of the thermostat connector.
2. Now we move the container with the drained antifreeze under the thermostat and unscrew it with a 13 key from the cylinder head (on engines manufactured after 2003) or loosen the clamps on older engines.

3. We take out the insert with the thermostat valve and place it in a vessel with water.

4. The water temperature should be monitored with a thermometer. If the valve opens at a temperature of 90 degrees, it is working. In any other case, the thermostat retires and is replaced with a new insert or assembled with the housing.

5. Before installing a new thermostat, we clean the mating surfaces of the thermostat housing and the block head, remove the remnants of the old gasket, degrease the surface and apply a very thin layer of sealant to both surfaces.

6. Install the gasket and install the thermostat housing. Depending on the instructions for using the sealant, tighten the bolts immediately or after the specified time. The same applies to adding antifreeze. The instructions for using the sealant may indicate that operation is possible only after a certain time has passed.
7. We check the tightness of the bolts/clamps and fill the system with antifreeze.

Signs of pump malfunction

Signs indicating possible pump failure:

• The occurrence of extraneous sounds, bearing noise or pump tapping.
• There is a significant increase in coolant.
• Pump leaks appear.

The reasons for the occurrence of these malfunctions:

• Critical wear of the pump shaft or bearing, affecting the circulation of the refrigerant and the appearance of leaks.
• Gasket failure due to deformation or wear.
• Shaft failure, as evidenced by its slipping, unstable fluid circulation and significant overheating.
• Pulley wear, as evidenced by belt wear.

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.

The process of replacing a thermostat on a 16 valve valve

First, you need the thermostat itself for your car model, a screwdriver and a “5” hexagon.

Of course, the first thing you need to do is remove the no longer working thermostat:

We drain the coolant, since otherwise it will not be possible to disconnect the thermostat (there will be liquid in the system).

If you don't drain the coolant, you can "crash the engine compartment"

Removing the air filter cover

Loosen these clamps on the thermostat.

Unscrew the bolts on the thermostat

New thermostat rubber

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.

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.

see also

Is it possible to replace only the thermostat valve itself?

0 5 2k

Thermostat

0 0 76k

VAZ 2112 engine temperature

0 2 3k

VAZ 21102 engine temperature does not rise

0 1 5k

Replacing the VAZ 2112 thermostat is necessary if it has stopped opening the valve that releases antifreeze in a large circle to cool the engine, as well as if the valve remains in the open position or is jammed. Replacing the thermostat of a VAZ 2112 16-valve engine is no different from replacing it with an 8-valve one. The only difference is that the thermostat of the 16 valve VAZ-2112 engine has an increased resistance of the bypass valve (throttle hole), due to which the fluid flow through the heater radiator increases.

Purpose of the VAZ-2110 thermostat, design and principle of operation

Thermostat is a unit installed in the car’s cooling system that regulates the direction of coolant in a large and small circle (depending on the engine temperature).

The node performs two tasks:

1. Helps the engine warm up faster in cold weather;
2. Eliminates the risk of overheating.

Both functions are realized thanks to temperature control and the ability of the main valve to change its position (open or close under the action of the trigger element).

Structurally, the VAZ 2110 thermostat is a unit with a cylindrical cross-section and three, five or six outputs, depending on the design.

Main exits:

• To the pump;
• From the radiator;
• From the engine.

The functionality of the device is ensured by the following elements:

1. Bypass valve;
2. Main valve and its spring;
3. Piston and its holder;
4. Heat sensitive composition;
5. Bypass valve spring.

Operating principle:

• Inside the device there is a valve with a special substance inside, which expands (contracts) as the temperature increases (decreases).
• When a certain temperature level is reached (80.6-81.5 degrees Celsius), the mentioned substance presses on the valve, gradually opens it and directs the flow of coolant through the outlet pipe to the radiator (large circle). When 94 degrees Celsius is reached, the main valve opens to its maximum (about six millimeters), and the bypass valve closes.
• At low temperatures, the thermostat bypass valve is in the open position (the main one is closed), and the coolant flows in a small circle (without the participation of the radiator). This ensures quick warm-up of the engine.

Read more about the operating principle of the thermostat here https://autotopik.ru/obuchenie/944-princip-raboty-termostata.html.

A stuck or other valve malfunction can cause the following problems:

• Overheating of the motor with the ensuing consequences;
• Inability of the power unit to reach the required temperature (relevant in winter).

The thermostat is not working. Signs and symptoms

Only the most irresponsible motorist can fail to pay attention to the incorrect operation of the VAZ 2110 engine cooling system. Constant overheating or, conversely, operation at a low coolant temperature threatens not only a high level of wear of rings, pistons and liners. In critical cases, overheating can cause the piston to stick or seize, rotate the main or connecting rod bearings, bend the valves, destroy the camshaft and many other unexpected troubles.

Old and new thermostat valves. Wear is obvious

How does the VAZ 2110 thermostat work?

Theoretically, a tens thermostat is a regular valve that is controlled by a temperature-sensitive element.

Depending on the temperature of the coolant, it either closes the gate and sends antifreeze in a small circle, bypassing the main radiator, or opens it and forces the liquid to circulate in a full circle, including the cooling radiator, heater, engine water jacket, and throttle heating system.

As shown in the diagram, the thermostat is designed as a spring-loaded bypass valve. Under the influence of a spring, it is in the open position and passes liquid in a full circle through the radiator of the cooling system. In this case, the liquid cools faster, but, naturally, warms up very slowly, especially in winter.

Since we know that the engine can normally operate only at a temperature in the range of 97-105 degrees, then in the case of constant circulation of fluid in a large circle in the cold season, warming up the engine occurs very slowly. This causes increased fuel consumption and severe wear of rubbing engine parts.

Factors affecting cost

If you want to purchase a working radiator, spending a minimum amount of financial resources, then it is recommended to visit different places that sell auto parts and compare the cost and quality of the part you are interested in. The cost range for the VAZ 2112 auto radiator is wide. This is due to the influence on the price of such factors:

1. Type of auto parts.
2. Originality.
3. Brand.
4. State.
5. Quality.
6. Place of purchase.
7. Seller's fame.

All auto radiators can be divided into four types:

1. Equipped with oval tubes. They have excellent heat transfer. The prices are reasonable. The disadvantages are the general hardness and the small number of manufacturers.
2. With round tubes. Their heat transfer is lower. Special gaskets are required for this to work.
3. Monolithic aluminum. Characterized by excellent quality. This part is susceptible to corrosion. Its cost is high.
4. Sintered. They are distinguished by quality, reliability, durability, optimal heat transfer. Suitable for powerful engines.

Also, all radiator devices are classified into:

• Liquid (coolant circulates due to the operation of the pump).
• Oil-based (characterized by complex manufacturing work, durability and higher cost).

For gasoline engines, the latter option is usually chosen for auto radiators.

Depending on the material of manufacture, there are radiators from:

Today, aluminum options are more often used due to their low cost and optimal characteristics. Copper parts are considered the most expensive and high quality.

Depending on the condition, car radiators for the VAZ 2112 are classified into:

There are also original and non-original devices. The latter can be of the following brands:

What are the features of the classic and alternative connection options?

In the first case:

• The main thermostat valve is flushed with coolant from the main radiator and engine;
• The thermostat opens for additional cooling - in this case, there is control not only over the entire coolant temperature in the system, but also over the temperature of the coolant leaving directly from the engine, and this, as is known, is the hottest place in the cooling system.

The standard connection diagram for a six-hole thermostat will look like this.

Connection example.

In the second case:

• The thermostat is additionally washed with coolant from the heater and bypass.
• The device controls the temperature, which is lower than the motor temperature (from the thermostat output or from the bypass). It turns out that in winter such a thermostat will work later than according to the classic connection scheme. The functioning of the stove also improves, which works more actively the lower the temperature outside.

The alternative connection diagram has two options.

As for the speed of warming up the engine, it remains unchanged, because the path of coolant flow until it reaches 82 degrees Celsius has not changed, as has the heat capacity of the system.

New cooling system

The sequence of your actions in this case is as follows:

1. First of all, for safety reasons, disconnect the negative terminal of the battery. We drain the cooled antifreeze or antifreeze, first opening the expander cap. To drain the liquid you will need a container with a volume of 4-5 liters.
2. Now, after unscrewing the two nuts, remove the wipers from the car.
3. Then we dismantle the released protective plastic cover under the windshield, which is secured with 2 nuts and 4 self-tapping screws.
4. To access the stove, remove the frill of the car by unscrewing 5 self-tapping screws, 1 screw and 2 nuts located at the bottom, in the middle of the frill, in the area of ​​the steering rack.
5. In order to remove the stove, remove the yellow cross brace, if any, as well as the curved bellows of the air filter.
6. We pull the chokes off the radiator pipes.
7. Then disconnect all electrical wires from the stove terminals.
8. At the steering rack, unscrew 2 nuts that secure the heater, 1 nut securing the heater to the body.
9. We unscrew the 3 screws connecting the two halves of the stove.
10. We take it out by swinging the right side of the stove, first moving it to the right.
11. The radiator in the removed half of the stove is secured with 3 screws. We take it out and replace it with a new one, not forgetting to put on the foam seal. We check the operation of the fan and, if necessary, repair it or replace it with a new one.
12. Before installing the assembly, it is advisable to rinse the coolant supply hoses with running water.
13. Assembly is carried out in reverse order.

Characteristics of DTOZH

First, let's look at the main characteristics of the regulator, which is often called a fan switch sensor. Let's start with the operating principle.

Principle of operation

The design of the part is based on a thermistor-resistor, which changes the resistance level depending on the temperature conditions. The thermistor itself is installed in a steel case with a thread applied to it. Directly connected to the body is the rear plastic part of the device, which contains the contacts necessary for connecting the power wires. One of these contacts is positive and it comes from the ECU, the second is negative, which is connected to the body.

In order for the engine temperature sensor to operate, it is powered by a voltage of 5 volts. The voltage is supplied from the ECU through a constant resistance resistor. Since the DTOZh thermistor itself has a negative temperature coefficient, as the temperature increases, the resistance parameter on it will begin to fall. In addition, the voltage supplied to it will also decrease. As a result of the decrease, the ECU calculates the temperature of the power unit, and the corresponding readings are transmitted to the instrument panel. The regulator should turn on when the ignition is turned on.

Where is?

If you are the owner of a VAZ 21124, you will probably be interested in knowing where the coolant temperature regulator is located on a VAZ. On Ladas of the 12th family, the location of this device is quite simple - as can be seen from the photo, it is installed in the metal exhaust line of the cooling system on the cylinder head. The VAZ fan switch located here allows you to accurately determine the temperature of the consumable, since antifreeze passes through this line.

Why install a Granta thermostat on a VAZ-2114?

Thermostat Lada Granta

Any adjustments that are made to the design and interior heating circuit of front-wheel drive VAZ cars are designed to either improve ventilation or improve heating and raise the temperature in the cabin in winter. Almost since the appearance of the first 2108, no changes were made to the cooling system and its architecture, which means that heating the interior remained ineffective.

With the advent of the modernized cooling system of the Lada Granta, the situation has changed for the better and here's why.

Cooling system VAZ-2114

If you look closely at the coolant circulation diagram in a Samara family car, it becomes clear why the heater radiator warms up last. The diagram shows that the cold (small) circle of the heating system does not include a heater radiator; more precisely, the heater radiator is connected in parallel, which certainly does not contribute to the rapid heating of the heater.

At the same time, we also take into account the ability of thermostats to react incorrectly to temperature and leaks in the air ducts, so until the engine warms up and the large full circuit of the cooling system turns on, you can’t even dream of heat in the cabin.

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.

Cooling system diagram

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?

The engine begins to overheat or does not reach operating temperature - these are the main two criteria for a faulty thermostat.

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).

Types of thermostat breakdowns

• The valve on the thermostat is stuck.
• “Stuck” or does not open at all.
• Incorrect start time.

Malfunctions

VAZ 21124 engines have the same set of characteristic disadvantages characteristic of all VAZ engines. The most common:

The Lada of the tenth family in the hatchback body is the VAZ-2112 model. All cars of this family were produced until 2009. The range of engines included four options. Among them, by the way, were two 8-valve engines. Below we present the characteristics of 16-valve engines, but engines with 8 valves do not deserve attention. The torque graph proves these words true. So, let's look at the characteristics of VAZ-2112 engines with four valves per cylinder.

124 engine under the hood of the “two-wheeler”

The pistons of the 124 series engines have grooves for the valves. Simply put, the internal combustion engine of the VAZ-21120 is plug-in (as a result, and then depending on your luck), and 21124 is not plug-in (). Let's estimate the torque.

Moment of force, N*m

The most interesting thing here is the VAZ-21120 engine. In terms of “low-end traction” it is not much inferior to 8-valve engines.

Formal characteristics

Here are the characteristics of two different motors:

• ICE model: 21120/21124;
• Working volume: 1,488/1,596 l;
• Compression ratio: 10.5/10.3;
• Power: 93/90 hp;
• Rated power speed: 5600/5000 rpm;
• Maximum torque: 140/131 N*m;
• Recommended fuel: AI-95/AI-95;
• Ecology: Euro-3/Euro-4 or Euro-3.