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

This article will propose a consideration of replacing the thermostat on a VAZ-2112 car. All issues of interest will be discussed in detail in this work. What is a thermostat? What is it for? How to replace it? Small circle and large circle, differences? All these and other questions will be directly addressed and described in detail in this article.

Video about replacing the thermostat on a VAZ-2112 with your own hands:

The video shows the process of replacing a thermostat, choosing a thermostat and tips for carrying out work to remove it.

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.

Tips before starting the procedure

1. Before you begin removing the thermostat on a VAZ 2112, be sure to ensure that it has completely cooled down after operation.
2. The thermostat is removed when it is replaced due to unstable engine temperature conditions (overheating, insufficient heating). To carry out this procedure, completely draining the coolant is not necessary.
3. To check the condition of the thermostat, start the car engine and touch the lower radiator hose, at first it should remain cold, and only after the coolant temperature reaches about 90 degrees, the hose will begin to gradually heat up. If there is no such reaction to the manipulations performed, remove the thermostat from the car and check its functionality; if defects are detected, it must be replaced with a new one.

This is interesting: Why does error P0134 appear and how to eliminate it on VAZ cars?

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

This article will propose a consideration of replacing the thermostat on a VAZ-2112 car. All issues of interest will be discussed in detail in this work.
What is a thermostat? What is it for? How to replace it? Small circle and large circle, differences? All these and other questions will be directly addressed and described in detail in this article. Video about replacing the thermostat on a VAZ-2112 with your own hands:

The video shows the process of replacing a thermostat, choosing a thermostat and tips for carrying out work to remove it.

How to replace a VAZ-2112 thermostat with 16 valves yourself

The main purpose of the thermostat is to control the heating of the 16-valve engine, which is installed in the VAZ-2112 car.
The design of the thermostat includes a valve containing a special substance. As soon as the VAZ-2112 begins to heat up, the valve opens and liquid enters a large circle to cool the 16-valve engine. If the coolant does not flow into a large circle, the car will overheat, which can lead to serious consequences. To avoid this, you should constantly monitor the technical condition of the machine; replacing a broken thermostat should be done in a timely manner.

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:

Functionality check

First of all, let’s not rush to remove the thermostat, because this requires a lot of fiddling. It may turn out that we are sinning against him in vain, but the issue is something else:

1. Heat. We take hold of the lower radiator pipe and let someone start the engine. If there is no assistant, then start it yourself, you will have time to hold on to the hose. Please note that the car must be cold before this. At first the pipe is naturally cold, but when the engine is running it heats up very quickly. If this happens, it means that the thermostat is working properly, installing a new one is not required yet;
2. Thermocouple. If doubts remain, you will have to disassemble. From the thermostat that has already been removed, it is necessary to remove the thermoelement - it is this element that is responsible for starting the cooler in a large circle, and it is this element that needs to be checked. This happens by lowering the thermoelement into fairly hot water (about 75'C) and then heating it. Naturally, you need to lower a thermometer into the water and monitor changes in temperature and the device itself. As it approaches 90°C, the thermoelement rod must extend. That did not happen? This means that this part needs to be changed. Most often, on a VAZ 2110, replacing the entire thermostat is not necessary - it is more expensive, and moreover, it is most often necessary only if some changes are detected in the “appearance” - such as a crack, chip, etc. ;
3. Replacement. If we find problems or need to change the thermostat, we go to the car market or to the store where we buy a new one. Here, too, “pitfalls” may await us - the replacement will not bring the desired result if the new thermostat is, as they say, “flawed.” You need to blow hard into the fitting. If air does not pass anywhere, then the small circuit does not allow it to pass through, and its installation on a VAZ 2110 is possible.

Before replacing a broken thermostat, you need to remove it:

1. Unscrew the cap from the expansion tank; this is necessary so that antifreeze flows normally out of the system;
2. Remove the plug from the drain hole at the bottom of the radiator tank, first replace it with a clean container and drain the antifreeze;
3. Remove the entire thermostat assembly. Or, if you prefer, just its thermocouple.

In the latter case:

• Remove the hoses located on the thermostat cover pipes;
• Remove the cover with the thermocouple. Now you can check it, as already described.

Symptoms of a problem

There are several main signs of a malfunction:

1. The engine takes a long time to reach operating temperature.
2. While driving, the engine overheats even on short trips.
3. The engine temperature drops while driving and rises if you stop and let the engine idle.
4. A few minutes after starting the engine (in warm seasons), the lower pipe is warm. This indicates that the thermostat is opening very early.
5. If the engine (coolant) temperature is close to boiling and the lower hose is cold, it is most likely a stuck thermostat valve.

How to replace a VAZ-2112 thermostat with 16 valves yourself

The main purpose of the thermostat is to control the heating of the 16-valve engine, which is installed in the VAZ-2112 car.
The design of the thermostat includes a valve containing a special substance. As soon as the VAZ-2112 begins to heat up, the valve opens and liquid enters a large circle to cool the 16-valve engine. If the coolant does not flow into a large circle, the car will overheat, which can lead to serious consequences. To avoid this, you should constantly monitor the technical condition of the machine; replacing a broken thermostat should be done in a timely manner.

Front side of the engine

The front side of the engine is located near the right mudguard. It has a two-piece plastic cover.

Below it are the drives of the gas distribution mechanism and the electric generator. The timing belt includes: camshaft gears, a coolant pump and 2 rollers, one of which regulates the tension of the timing belt. At the end of the crankshaft there is a timing gear, a generator pulley and an oil pump. These components are driven by its rotation.

Model selection

For the VAZ 2110 you can choose either aluminum or copper radiators. To a large extent, the choice depends on what result you need: saving money or durability and reliability.

Their disadvantages and advantages:

• Aluminum. Lightweight, relatively cheap, the price depends on the manufacturer: - Luzar (2110-8101060) - about 1000 rubles; - Pramo (2110-1301012) - retail approximately 1600 rubles. But its thermal conductivity interferes, and it cools the engine worse. In addition, it is subject to fairly rapid corrosion; it takes less time for it to flow; Aluminum radiator cooling
• Copper. It is heavier, significantly more efficient in its cooling characteristics, and lasts longer, since the copper body is less susceptible to corrosion. For it to flow, mechanical action (impact, etc.) is most often required. The disadvantage is that its price is higher, about 5,000 rubles, for a two-row one, with an increased efficiency of 40%. Copper cooling radiator with 40% increased efficiency

Diagnostics with dismantling

A very simple way. To check, you need to remove the part from its seat. Further:

1. Fill the container with water.
2. Heat the container.
3. Immerse the part being tested completely in the liquid.
4. Monitor the temperature of the liquid using a technical thermometer.

After heating the water to t = 85–95 degrees, the rod should begin to extend and the thermostat valve should open. If this does not happen, the part is considered faulty.