Flushing of hydraulic compensators: the order of actions. Knocking the hydraulic compensators on the cold

Car repair in own hands in most cases allows not only to save considerably, but also in time to prevent serious malfunctions. In cars equipped with 16-valve cylinder head, hydraulic compensators can knock. You can correct the situation. It will help wash the hydraulic compensators. Let's see how this is done.

Hydrocompensators: what is it and where are they located

These elements are an important part of the gas distribution mechanism. Find these hydraulic lifters directly above the valve. To be more precise, it is under the camshaft cam.

This part looks like a cylinder. Inside it there is a special check valve, a plunger pair, and also a spring. Special channels are made in the walls of the hydraulic compensator. They serve to circulate the oil.

Function of hydraulic compensators in the engine

During operation of the engine of the car, each of its parts is heated to high temperatures. The valves are also heated. If you recall the course of physics, then at the time of heating the body expands. So, the gaps between the valves and rocker arms in the valve mechanism will inevitably decrease.

On old models of cars with engines of simple design, the valve clearances were manually adjusted . This is a simple job, but it requires certain skills, knowledge and a set of tools. If the gaps are adjusted incorrectly or not in time, there will be certain problems. One of them is a knock, which is familiar to every owner of such a car. This noise indicates that the gaps are too large.

Small gaps, too, led to certain problems. Because of this, the valve was closed loosely. The mechanisms had to be adjusted quite often, since the tuning was constantly lost during the operation of the motor.

Due to the introduction of hydraulic compensators, the car owner no longer needs to adjust the valve clearances. Now this is done automatically. In other words, the presence of hydraulic compensators in the motor design significantly simplifies the engine maintenance process, increases the life of the valve mechanism, provides the motor with a more elastic and stable operation.

Symptoms of hydraulic compensator failure

One of the characteristic symptoms is a metallic knock during engine operation. Especially clearly, these noises can be heard at the time of the set of revolutions. You will hear the clown. Most often among the reasons are the pollution of the hydraulic compensator from the inside. Therefore, it can not select the thermal gaps in time.

Sound on a cold engine

You can also hear the knock of the hydraulic compensator on the cold one. After warming up the engine, the sound disappears. But it can be saved. If these sounds occur only on a cold motor, then it's not so scary. There are several reasons that are completely removable by one's own hands.

Wrong oil selection

Noises on the cold engine can happen for trivial reasons - the engine is flooded with a higher viscosity oil. Sometimes it does not meet the requirements of the manufacturer or has developed its own resource.

Buying a car "with hands", it is recommended to change the oil immediately to a new one. Also before the replacement, you must flush the engine from the inside. This is done simply by own hands in garage conditions. Specialists recommend filling semisynthetic liquids. If the oil changed, but the knock of the hydraulic compensator on the cold one is still audible, it is worthwhile to consider other reasons.

Valves

Sometimes the hydraulic compensator valves may fail. In this case, the oil, when the engine is not running, will leak due to loose connections. The system gets air, which then disappears when oxygen is displaced by the oil.

Inlet

It happens that the inlet on the hydraulic compensator gets clogged. The hole is responsible for supplying oil to the part. When the engine heats up, the temperature and oils increase. The gaps expand and the oil starts to flow as expected. However, various viscous elements then again clog the inlet. You can replace the oil with a viscosity that is lower. Cleaning the engine will also help. Along with these measures, washing of the hydraulic compensator is also effective.

Oil Filter

If this element has not changed for a long time, then this is also one of the reasons why the hydraulic compensator will knock on the cold engine. Together with the heating of the engine and oil, it will normally flow through the filter. But more often than not this does not happen. Elements knock even on a warm engine. Solve the problem by changing the oil together with the filter.

How to check the efficiency of hydraulic compensators

And how to check the VAZ hydraulic compensators? By dismantling the valve cover, you can access these elements. Further on each of them press a finger. If the part fails, it will be heated without effort.

In this situation, you can not restore the item. Only replacement will help. How much does the replacement of the hydraulic compensators depend on the model of the car and the engine. So, for most models of VAZ this operation will cost five thousand rubles. If imported parts are chosen, then the price will be 7-10 thousand. Naturally, this is not an exact cost - specific figures depend on the region and brand of the car. If the mechanism is only heated from a serious effort, then it is possible to restore the efficiency and remove the knocking by washing the hydraulic compensators.

Preparation for washing

So, if there is a knock, but the CCs are completely in order, then they should be washed. To do this, remove the air filter and the cover of the cylinder block. Also, the axles of the rocker arms are dismantled, where the hydraulic compensators are located. They are carefully removed from the seats. Before washing, three tanks are prepared, which together have a volume of about five liters.

Before flushing, you should let the car stand in the garage for 24 hours. During this time, the oil will drain from the GK into the pallet. Flushing the hydraulic compensators will be successful and effective if carried out in an enclosed area where there is no dust and wind. As a washing liquid, kerosene or gasoline A-92 can be used. But you can use specialized products.

Instruction, procedure of actions

After dismantling the expansion joints, they are cleaned from the outside with brushes with unnatural bristles. Then the parts are washed in the first tank, where the liquid for washing the hydraulic compensators is pre-filled. Each element is lowered into a container and several times the wire is pressed against the ball check valve. Then press down on the plunger.

If the plunger stroke became easy, then the compensator is rinsed in the second container. However, before this, all the liquid is drained from the compensator. To do this, just squeeze the ball. The oil circulation channels are washed using a syringe.

An important point in performing this operation is checking mechanisms. So, by lowering the compensator in the third container with the cleanser, the liquid is poured into the part.

Then lower the part and pull out so that the plunger looks up. If you press it with your finger, it will not move. When all is exactly so, the parts are returned to their place and the engine is assembled.

With the help of such a simple procedure, you can return the hydraulic compensators working capacity. Even an expensive additive-washing Liqui Moly hydraulic compensators will not be more expensive than replacing these elements with new ones.

How to rinse hydraulic compensators without removing them

For those who are too lazy to shoot GC, you can perform the washing without dismantling. So, to do this, remove the intake manifold. Then take any liquid to extract and pour it into each of the cylinders. Then the motor is turned by a starter. Then, the lid is removed and the compensators are poured over with a carburetor cleaning agent. It is better to choose a good liquid and expensive. Then leave the car intact for a couple of hours.

Then everything is assembled in the reverse order. At the time of starting the engine, it is recommended to press the gas into the floor. From the exhaust pipe smoke will go and different garbage will fly out. Gain high speed and hold until the moment when the smoke from the exhaust pipe will not stop coming out. It is recommended to drive at high speed for a while. Such washing of hydraulic compensators without dismantling is very widely used by car owners. However, it is not as effective as removing it.

Additives and liquids for washing GC

According to most experienced motorists, as the best means for washing it is necessary to use only gasoline A92. Also suitable kerosene. Along with these folk remedies, eminent car chemistry manufacturers offer branded liquids and additives. I must say that most of these products are ineffective. But many pour them, because they know well how much is the replacement of hydraulic compensators. A lot of information is available about the product from Liqui Moly to reduce the knocking of the hydraulic compensators.

The manufacturer promises that with this additive it is possible to clean not only the expansion joints on any car, but also the valve openings. Also, the additive increases the lubricating qualities of motor oils. If necessary, the liquid can also be used as a cleaning agent for the entire lubrication system.

If, for example, the hydraulic compensator "Niva-Chevrolet" knocks because of contamination, then this product handles this problem well. Reviews of motorists note that you do not even need to drain oil. It is enough to pour in a jellied mouth one bottle of this product. In other cases, additives will not help - this is not a cure for all diseases. But the manufacturer still recommends to fill in the additive with each oil change.

After washing, the same hydraulic compensator "Niva-Chevrolet" stops knocking after 50 kilometers of the car's run. If you take into account how much a new element costs, the price of washing 400 rubles is a significant saving. But in the reviews it is noted that this is not always effective. In the running cases it is necessary to change the hydraulic compensators entirely.