Hit the hydraulic compensators on the cold: we establish the reasons

Experienced car owners who closely monitor the condition of their car, constantly listen to the various noises that sometimes arise during the operation of the car. Hearing the noise, they immediately try to find the cause and eliminate it. Many are knocking the hydraulic compensators on the cold. Let's try to understand this and find out how to eliminate such a knock.

How is the hydraulic compensator

The design is a body and a movable plunger pair, which consists of a sleeve, a spring, and a valve with a ball. There are several versions of these nodes. The hydraulic compensators are also knocking on the cold, regardless of the type. At the moment when the cams of the camshaft become their non-working side to the pusher, a gap is formed between the plunger and the shaft. To allow the grease to enter the plunger, it is equipped with a special valve. Thanks to the spring, it can rise, thereby compensating for the gap. At the same time, oil enters the body of the compensator. When the camshaft rotates and presses against the pusher, the valve with the ball closes. The oil is squeezed into the gap of the plunger and bushing. This additionally changes the volume. So the compensator performs its functions.

Hit the hydraulic compensators: we establish the reasons

So. Car enthusiasts with great experience argue that a completely serviceable car will not knock anything. And if extraneous noises have appeared, then something is wrong. Why these knots can knock?

Among the main causes can be identified mechanical wear or production, which is formed on the surface of the plunger pair. Also, foreign sounds can occur due to the unstable operation of the valve responsible for supplying oil. Perhaps the banal contamination of the compensator. Often motorists are faced with the fact that the car is filled with unsuitable oil or poor quality. In addition to all this, it is noted that the hydraulic compensators knock on the cold due to the air that appeared in the lubrication system. Thus, air bubbles affect the compressibility of the oil. It is also worth checking the oil filter, it may be clogged. It is possible that the channels for lubrication are clogged.

The compensators do not knock all at once. Sounds can appear due to wear or failure of even one part.

All the fault of the oil ...

If the hydraulic knobs knock on the cold, it makes sense to sin on the oil. And more precisely, it's on the viscosity. If the lubricant in the engine has not changed for a long time, now is the time to replace it. If you decide to diagnose your car, be sure to consider the most optimal oil temperature. Maybe it's just the temperature.

Valve Valve

It happens that this valve does not hold oil. Then, when the motor is cold, it can leak out due to loose connections. So the air enters the system. When warmed, it disappears 10 minutes after starting.

To diagnose this, you need to start the motor. Let the engine run for at least three minutes. Turn the revolutions to 2500. Then reduce to idle, and then - again add revolutions. This is enough to completely exit the air, and the compensator stops knocking. But at each start, the hydraulic compensators knock on the cold again and again.

Inlet

It happens that this hole can be clogged, and in fact it is intended for grease intake. How does the compensator work further as the engine warms up? The lubricating fluid heats up, then the gap widens. The debris that covered the holes disappears, and the oil begins to flow in an amount close to normal. However, different viscous particles will again block the hole during cooling, which will lead to poor access to the lubricant. That's why the hydraulic compensators knock on the cold one.

To solve the problem, you can try to replace the oil. The required lubricating fluid must have a lower viscosity. It is recommended to wash the engine before replacing. Also, car owners will be saved by installing a new node.

Oil Filter

If it is hammered, this is one of the reasons why the hydraulic compensators knock on the cold one. Extraneous sounds stop as the engine warms up. Then some part of the lubricant passes through the filter. However, in most cases, a miracle does not happen. The driver will hear a knock even when the engine is warm.

To get rid of this problem, you just need to replace the filter. Also, you can replace the lubrication itself, if enough time has passed since the last replacement.

More experienced motorists constantly keep a "logbook", where they write kilometer when replacing oil, as well as the time of the operation. It is very helpful to fulfill it on time.

Why are the hydraulic compensators knocking on the cold: "Priora"

This is a common problem in these models, as well as many others from Avtovaz. Let's try to figure out where the knock comes from and how to deal with the problem.

Here are some typical reasons for the occurrence of knocking. So, if it knocks while snacking, and then the noise disappears, then this can not be considered a problem. If extraneous sounds appear on both the cold and the sufficiently warmed-up unit at the time of increased rpm, then most likely you will have to replace the node. Perhaps pollution - here you can do a banal cleaning.

Hydrocompensators and Accent

The reasons for the knock are standard here. The owners write that the problem can be solved by replacing the oil. More experienced owners believe that if the hydraulic compensators knock on the cold ("Accent" is not an exception) - this is nothing more than a feature of the engines.

But in general, most drivers change the oil viscosity to 5W30, and this allows you to completely get rid of the knocking of these mechanisms in the engine.

You should check the oil pump. Perhaps it does not give the right pressure. Also, many recommend lubricating products from the manufacturer "Valvoline".

How to check the hydraulic compensators with your own hands

You can check the status of the spring.

You can also measure the size of the gaps between the guide sleeve and the valve rod. If the gap is large, it must be eliminated.

Then turn the crankshaft in such a way that the knocking valve starts to open. After this, you can turn the spring. The valve will crash together with it. After starting the engine, the knock must completely disappear. If the hydraulic compensators are still knocking on the cold, Priora needs to repeat the above operations. And it's best to replace the damaged node with a new one.

How to find out which of the hydraulic compensators has failed

Usually enough acoustic diagnosis. If this method does not help, then click on the node with a screwdriver. A normally functioning design will be squashed if sufficient force is applied. If it easily burns, then it is defective and should be replaced as soon as possible.

In the second way, it is necessary to install the cams of the camshaft mechanism by its projections upwards. Here you need to make sure that there is a certain gap between the cam and the pusher. While heating the compensator down, try to compare it with known good parts. If there is a gap or the lowering speed is high, then you need to clean or replace the element.

How to eliminate a knock

Naturally, optimal is a replacement. You can also try to repair it. However, there are other ways. So, you can try to rinse these knots. It is worth saying that this process requires certain skills and a time resource. But this event does not guarantee that the sounds will be eliminated. For many, the knock of the hydrikas on the cold was eliminated only after replacing them with new ones. Even the new oil did not help.

Consequences of knocking

If you hear these sounds on a regular basis, do not wait for something. Urgently address in service. On some cars, knocking is considered the norm. This applies to domestic production machines when warming up (the details of the parts are no longer fading). But in most cases this significantly reduces the service life of the gas distribution mechanism. You need to drive carefully.

Knocks after replacement

Usually new parts do not knock.

If you still hear the sounds, then this is a production fault or a problem with the valves. In order to perform an accurate diagnosis and make sure that the valves have nothing to do, you need to check their fasteners. There is an option that the parts did not give the desired shrinkage. We simply twist them and thereby remove the knock of the hydraulic compensator.

Eventually…

From all this it is clear that it is possible to knock on the cold for a variety of reasons. If the compensators are noisy and this does not stop, then you need a replacement. But you can use modern additives, which, according to manufacturers, reduce noise. You can also expect that the oil change will help. Now you know why the hydraulic hammers are knocking - you can easily find and eliminate the cause yourself.