Drivers start their iron horses every day. If the owners treat the car carefully and reverently, then they will definitely listen to whether the engine is running smoothly and whether new sounds appear at startup. I refueled, for example, at another gas station, and the engine is already starting to work in a completely different way. Or the thermometer dropped sharply during the night. On you! Even the human body reacts to temperature drops, what can we say about the motors of our wheelbarrows? The engine should always run the same way. But sometimes still. So, you can find, for example, that hydraulic lifters are knocking in a car. What threatens this knock?
What are hydraulic lifters?
"Hydraulics", hydropushers or hydraulic pushers. These are all different names for hydraulic lifters. With a question about the reasons for the knocking of this part of the mechanism, motorists often turn to specialists. Sometimes they try to find the answer on the Internet. Usually they are interested in the causes of knocking and what does its appearance lead to? Hydraulic compensators are part of the engine design. They are designed to automatically adjust the thermal clearances of the motor valves. The principle of operation of hydraulic compensators is to automatically increase the stroke by a distance equal to the gap in the timing (gas distribution mechanism). This is achieved by the work of the spring and the supply of oil. The hydraulic compensator consists of a plunger pair, a plunger spring, a housing and a check valve.
The knock of the hydraulic compensator
Hydraulic lifter knock is a common complaint. They say, sat down, started, and here is such an unpleasant surprise! Let's try to figure out why this happens. If a motorist hears the sound of hydraulic lifters on a cold engine, this can scare him in earnest, especially if the motor is already many years old. He thinks that my dinosaur will fall apart not today or tomorrow. But ahead of time to bury a wheelbarrow is not worth it. The reason for this may be the following:
How to fix?
What to do if the hydraulic lifters suddenly rattle? First of all, the motorist needs to recognize the cause. In case the oil is to blame, it is better to replace it. It is worth choosing semi-synthetics. Initially, you can try flushing the engine with a special fluid. Their diversity is great. Flushing liquids are based on mineral oil. Alkaline additives are added to it, which are designed to clean the engine walls from unnecessary dirt. Now there are two on the market: the so-called fifteen minutes and long-term liquids. Flushing is usually carried out before changing the oil. If this procedure does not eliminate the knock, you need to think. In the event of a malfunction of the inlet, an oil change to an oil with a lower viscosity is required, the engine is flushed and the hydraulic lifters are replaced. It is better, if done, to change everything at once, and not just one. Even if only he was out of order. If the oil filter is clogged, it can also be replaced. Thus, the knock can be removed.
Sometimes the reason is in the hydraulic lifters themselves Why knocks on hot?
We have already analyzed the reasons for the knocking of hydraulic lifters on cold engines, but why is it knocking on a hot one? If the car has already reached operating temperature, but the sound does not disappear, this may indicate serious problems. The reason may be:
- wear and increase in the seat for the hydraulic compensator. When heated, the space increases even more, which is accompanied by a knock;
- hydraulics and mechanics of the hydraulic compensator. The cause of the knock may be a malfunction of the “hydric” itself;
- engine overheating. Overheating of the engine is generally a dangerous thing, so if you have a domestic car, you should carefully monitor the temperature. If you are in a traffic jam, the fan does not work, and the temperature rises, it is better to turn on the stove at full power. Even if it happens in hot weather. The included stove will help to avoid boiling. Some craftsmen bring the fan on button into the cabin, which allows you to turn on the cooling in advance. In foreign cars, special systems are responsible for overheating, which signal an excess of operating temperature or prevent overheating.
Hydraulic lifters are also subject to wear. Where to begin?
The surest solution when knocking with a hydraulic compensator is car diagnostics. If the knock is repeated repeatedly, it is better to drive to the service station. If the owner is not strong in the device of the car, you need to entrust the swallow to professionals. They will not only help to understand the problem, but will tell you how to fix it. The primary task is, during the execution of which it is necessary to determine which hydraulic compensator is knocking. For this, acoustic diagnostics is usually used. You also need to disassemble and flush the hydraulic compensator. Maybe this procedure will help get rid of an unpleasant knock. It is not easy to remove the hydraulic compensator on your own, and you should not try if the car owner is not confident in his abilities. It is better to entrust this difficult task to a specialist. If the flushing of the hydraulic lifters did not bear any fruit, you should contact a good engine repairman. Maybe a specialist with many years of experience will help to find out what the problem is and can fix it. The cost of repairs will depend on the volume and complexity of the work.
The main thing is not to let everything take its course What can happen?
The consequences of knocking hydraulic lifters can be varied. So what causes such an unpleasant symptom? If the knock of the hydraulic lifters indicates a malfunction, rapid wear of the parts of the gas distribution mechanism may occur. Therefore, the performance of the motor may also deteriorate. Worn parts can begin to crumble and clog the insides with oil. All this can lead to clamping of the valves. The consequence of this may be a decrease in power and an increase in the load on the camshaft and other parts of the mechanism.
Summarize
So, if hydraulic lifters began to knock in your car, and this happens repeatedly, you should not waste time. It is best to contact a specialist with this problem. He will help "" and orient on the cost of repairs, if necessary.
Many motorists are faced with such a problem - hydraulic lifters knock on a hot engine. In our article we will talk about this unpleasant phenomenon. Let's start with the fact that the knock of hydraulic lifters can manifest itself not only on a hot engine, but also when it starts (on a cold one). The appearance of the knock of hydraulic lifters in hot and cold engines may depend on both the same and different reasons. There is an opinion that compensators knocking hot more systemically. While on a cold engine, this shock sound can only appear at some points.
First of all, any motorist must make sure that the shock sound that appears is emitted precisely hydraulic lifters, and not some other node or mechanism of the internal combustion engine. It only needs to be checked on a hot engine. However, this is not difficult to do, since the knock of compensators has a characteristic sound. However, if you doubt the diagnosis, it is better to contact the specialists in the repair shop.
Now consider the causes of knocking in hydraulic lifters. There are several such reasons, however, it is worth noting that not all of them are the problem of compensators.
The first (most common) reason. Compensators knocking because low-quality oil was poured into the engine or it has not been changed for a long time. To avoid the appearance of impact sounds, we advise you to buy only high-quality engine oil from reliable suppliers.
The next reason is clogged channels through which engine oil should flow into hydraulic lifters. And there will definitely be a knock. on a hot engine, but on a cold one it may not be. The thing is that while the engine is cold, the engine oil in it has one viscosity, but as soon as the engine starts to warm up, the oil changes its viscosity and problems begin to appear. To remove this sound, you need to change the engine oil and flush the entire system with high quality. In addition, a more viscous engine oil may need to be used in the future.
The third reason is compensators knocking due to clogged oil filter. Engine oil simply does not fit the hydraulic lifters at the required pressure, resulting in an air lock.
The fourth reason is an increased or decreased level of engine oil. In this case, the oil is enriched with air masses. While the engine is cold, the percentage of air in the oil is not yet high enough to make it compressible. Having worked a little, the engine heats up, the amount of air in the oil increases, making it critical. Resulting in hydraulic lifters start knocking.
The fifth reason is caused by problems with the oil pump. This happens with worn pumps that do not produce the pressure required for the full functioning of the vehicle's lubrication system.
The sixth reason is the wear of the seat under the hydraulic compensator. As a result of heating the engine, all its parts expand, respectively, the seat of the hydraulic compensator also expands and weakens even more, which causes knocks.
The seventh reason is in the hydraulic compensator itself. The knock appears due to problems with the hydraulics and mechanics of the compensator.
As you can see, there are a lot of reasons for the appearance of such knocks. It is very difficult to understand them, and even more so to accurately determine which of them is the main one. Although, you can not think about it and just change the entire chain, from the oil pump to the compensators themselves. This, of course, will lead to a positive result, but how much will it all cost?
In our opinion, the most correct solution for a novice motorist is to contact a normal specialist who certainly knows by what method to find the cause of the knock and how to optimally neutralize it.
Almost all automotive engines undergo a valve adjustment procedure. The procedure for adjusting valves is to set the gaps between the valve and the pusher. On engines where the valve clearance is manually adjusted, this must be done at regular intervals. This requires a certain skill, so the engineers came up with automatic gap adjustment. But this technology also has problems - this is the knock of hydraulic lifters, which will be discussed today.
Hydraulic compensator - is a device that allows you to automatically set the gap between the valve and the engine pusher. It is a metal cylinder in which there is a spring and a check valve.
The principle of operation is to change the length of the hydraulic compensator cylinder for the entire length of the gap in the timing. This device works from a reverse spring and oil pressure.
The hydraulic compensator is a non-tricky cylindrical device that consists of plungers, a reverse-acting valve and a spring.
The huge advantage of hydraulic lifters is that they automatically adjust valve clearances and save the car owner from this procedure. But besides the advantages, there are also disadvantages of this technology. The main one is a knock on a cold or hot in case of a malfunction.
How do hydraulic lifters sound?
The sound of hydraulic lifters resembles a clatter, very similar to the clatter of an loose chain. It comes from the cylinder head. From her top. The knock of the expansion joints can manifest itself in cold or hot, or it can always be present, depending on the wear of the expansion joints.
As we know, the operation of hydraulic lifters is directly related to oil. When the engine is cold, the oil simply has not yet entered the hydraulic lifters, so the engine may clatter characteristically for some time. But after a short time, if there are no other prerequisites, the knock will disappear.
This symptom is very clearly observed on domestic classic motors that are installed in the Niva of the last years of production. At one time, happy owners of these engines wrote a collective letter to the VAZ company and demanded a revocable company.
Causes of knocking hydraulic lifters
The main reasons for the knocking of hydraulics include two malfunctions:
- mechanical parts of the hydraulic compensator
- engine feed oil to hydraulic compensator
Mechanical failures include:
- Development and wear of the plunger spring. Most often it is natural wear, occurs due to the fact that the camshaft cams leave a working on the surface.
- Clogged hydraulic lifter. Namely, the clogging of the valve that is responsible for the oil supply. As a result of this malfunction, the hydraulic compensator begins to stick.
- Airing. Occurs when there is insufficient oil supply to the mechanism.
- Soot and contamination of the main elements of the hydraulic compensator. Occurs when using low-quality oil or additives.
Malfunctions in the oil supply to the hydraulic compensator can be caused by:
- Oil filter failure.
- Low oil pressure
- Incorrect oil viscosity or wrong oil
- Overheating of the motor, as a result of which the oil loses its properties.
As mentioned earlier, the knock of hydraulic lifters is possible both on hot and cold.
When the engine is well warmed up, and there is a distinct knock of hydraulics, which means that there are problems with the oil. Perhaps the oil has already lost its properties and needs to be replaced. Or oil is filled in that does not fit according to the regulations for your motor. Also, the possibility of a clogged oil filter is not ruled out.
Changing the oil and oil filter can help in this case. If the knock on the hot remains, it is worth diagnosing other elements of the engine. Perhaps the problem is with them.
As for knocking on a cold one, then there is no need to worry, almost always this knock is not critical.
What to do if hydraulic lifters knock?
First of all, you need to determine which hydraulic compensator is knocking. For motorists, it is usually not difficult to determine which hydraulic compensator is out of order. Yes, you can do it yourself. It's simple.
To do this, remove the valve cover. You will also need a device called a phonendoscope.
A phonendoscope is a device with a long wire at the end and headphones.
If this device is not at hand, you can try using a stethoscope. I think you already understood the essence, you need to listen to where it knocks the most, so you can determine which hydraulic compensator is junk.
If a faulty hydraulic compensator is found, you can try to eliminate the knock by cleaning. To do this, it must be disassembled and washed in diesel fuel or kerosene. In some cases, this helps eliminate knocking. If not, then you will have to change. Their cost is not so great and it is better to do it as soon as possible, because otherwise the consequences can be sad.
How to check hydraulic lifters
Checking the hydraulic lifters yourself is quite simple. The device is not complex in its structure.
In order to find out the serviceability, you need to try to press on the inside of the hydraulic compensator (which is adjacent to the valve). If it easily misses, then the hydraulic compensator is faulty, if not, then everything is in order with it.
Is it possible to drive with knocking compensators?
As mentioned earlier, this malfunction cannot be started. Killed hydraulic lifters have a very negative effect on the entire drive of the gas distribution mechanism. Repair is worth it, not very cheap. Also, the knock of hydraulics leads to faster wear of all elements of the cylinder head.
Cons of hydraulic lifters
In addition to all the positive qualities of this wonderful technology, it has several significant disadvantages.
- Almost always there is a knock of hydraulic lifters on a cold engine.
- Hydraulic lifters do not work well at high speeds.
Changed hydraulic lifters and they still knock
The knock of new hydraulic compensators after replacement may not always be associated with their malfunction or marriage. As mentioned above, the operation of these devices depends on oil. If the new expansion joints are not filled with oil, they will tap for a while until they are full.
Outcome
Undoubtedly, the technology of using hydraulic lifters is very convenient. It is used by many different manufacturers in engines for both the budget and premium segments. But some still use manual valve adjustment technology, such as Honda. This is due to the fact that their motors are highly revving, and as we said earlier hydraulic lifters, there is also little space in the gas distribution mechanism, since in most cases proprietary Vtec technology is used there and there is very little space for hydraulic lifters.
Good car owners always listen to the operation of their car, and if there is extraneous noise, they immediately try to eliminate it. Sometimes hydraulic lifters can be the cause of such noise.
A hydraulic compensator is a part that allows you to adjust the thermal gaps in the engine, and automatically.
Reasons for knocking
When the machine is in full working order, the hydraulic lifters will not knock. If there is extraneous noise, then something is wrong. Consider the main factors that may cause noise in the valve cover:
As a rule, all hydraulic lifters do not knock at the same time. A breakdown occurs only on one part, but it is impossible to find out which one without diagnostics.
Important! If you hear an uncharacteristic knock, it is better to contact the service station.
Usually they check whether the hydraulic lifters knock when the engine is cold and warm, while the reasons for knocking can be completely different. So, if there is a knock with a cold engine, perhaps the whole thing is in the oil, more precisely in its viscosity. If you have changed the oil for a long time, then you need to change it. Also, the cause of the knock may be in the hydraulic compensator valve - it does not hold well, so the oil flows out when the engine is turned off.
When checking the knock, you must also take into account the most acceptable temperature for the oil. Perhaps the whole point is in it - the wrong temperature for the oil, low-quality oil, or simply the wrong composition for the engine.
When checking the engine for "hot", the reasons are almost the same as when checking for "cold". The case may be in low-quality oil, filter contamination, or clogged oil supply channels. But there are a number of reasons that are visible only when checking for "hot":
- oil pump malfunction;
- malfunction of the hydraulics of the hydraulic compensator itself;
- increase in the landing site of the hydraulic compensator.
In any case, it is not always possible to determine this on your own, therefore it is advised to contact the service station.
We bring to your attention a video of how the valves work:
How to Calculate a Knocking Valve Cap
To find out which hydraulic compensator is knocking, it is necessary to carry out special acoustic diagnostics, but you can thoroughly find out the cause only by carrying out a complete diagnosis of the hydraulic compensator system. It is almost impossible to calculate a knocking hydraulic compensator on your own. In the attached video you can see how to check your BG:
How to eliminate the knock of the hydraulic lifter
Of course, the surest way to eliminate knocking is to repair, but you can try other methods, such as flushing. Let's say right away that this process is very energy-intensive and requires special skills. However, flushing does not guarantee the elimination of the causes of knocking, because sometimes the cause is not in the part itself, but in low-quality oil or other systems.
There are situations when there is a knock when the engine is cold, but not when it is hot. In this case, the whole point is not heated oil. In fact, this is very common among motorists, and many do not attach much importance to such a disappearing knock. If, even after warming up the engine, the noise does not disappear, then you need to contact an experienced craftsman to fix your car.
If one hydraulic lifter is knocking, then you can try to eliminate the knocking as follows:
- turn the crankshaft until the valve that suits the knocking hydraulic compensator opens;
- turn the valve and spring at an angle to move parts that have become incorrect;
- start the engine. If the same sound remains, then a serious diagnosis is needed.
This method is applicable for VAZ 2112 and for Lada Priora.
If the engine knocks on "cold", this is nothing to worry about, perhaps the oil is too thick, and this will pass when the engine warms up. When tapping on a "cold" ride, you can. If you hear a knock on the "hot", then you should not operate the car.
Important! Contact us as soon as you hear a knock. Then the repair will not take too much time, and the costs will be minimal.
How to replace hydraulic lifters
Replacing a hydraulic compensator is not a difficult task, it is quite possible to do it yourself, the model in this case does not matter, since the engine design and the principle of its operation are the same for all brands. The only difference may be as follows: when replacing the hydraulic compensator on some brands, you will also have to change the cover gasket. But in general, the principle of replacement is similar, so we will consider replacing the hydraulic compensator as a whole. So, you need to act in stages:
The removed valves can still be brought back to life by washing them, but it often happens that after replacing the hydraulic lifters, the old ones remain unwashed.
This action plan is completely similar to replacing valves on a Chevrolet Niva. Other models have slight differences. Therefore, we suggest that you watch a video on how to properly change hydraulic lifters in different cars:
- Gazelle with engine ZMZ 406:;
- Hyundai Accent: ;
- VAZ 2112:;
- On a number of models, the replacement of hydraulic pushers is very similar, for example, Volkswagen, Skoda, Audi, Seat, so let's combine them into one video:.
Important! If you do not know or are afraid to change hydraulic pushers yourself, then it is better to contact specialists.
If you own a car with n52 hydraulic compensators, then to eliminate extraneous noise, it is enough to change the oil to a thicker one, for example, 5W40. This will correct the situation, provided that the oil is to blame. Also, if you drive too slowly, it also has a detrimental effect on the engine. Follow the formula: "smooth acceleration with gentle braking" - this will help not only save the engine, but also reduce fuel consumption.
Consequences of GC noise
If you hear an uncharacteristic noise during the operation of the hydraulic compensator, you should not hesitate - go to the minder. If a system malfunction is not diagnosed in time, then the service life of the timing drive is significantly reduced, there is a large load on the cylinder head, which can subsequently cost expensive repairs.
If there is noise after replacing the HA
Another reason for the knocking of the HA may be their malfunction. Maybe it's just time to change them. In most cases, this is the main reason. If you had to change the hydraulic compensator, then it is better to change the entire kit. There is no guarantee that all HAs are in good working order and do not emit extraneous noise. If, after the replacement, the noise does not stop, then it is necessary to look for the cause in external factors.
Usually new hydraulic lifters should not knock. If this still happens, then this is probably a defect in the details or it was not at all about the valves. To make sure that the valves are not the problem, check their fastening, it is possible that the parts did not shrink properly and make such a sound. It will be enough to twist them and the noise should disappear. If the tapping has not disappeared, then you need to contact the technical service.
What oil to choose?
As we found out, hydraulic pushers can also make noise due to low-quality oil. How to choose the one that suits your car's engine. Therefore, when choosing an oil, carefully read its characteristics. It may be that it has the same viscosity, but the lubricating properties are different. It directly depends on the amount of additives in the oil. Be sure to check if the oil you choose is certified for the type of engine in your car.
Important! Choose the right oil, otherwise you will have to change more than just hydraulic expansion joints. Before changing the oil, it is better to consult with the engine specialist.
Video clearly showing how hydraulic expansion joints knock, in this case on Lada Priore:
To ensure that your car is always in excellent condition, keep an eye on it and diagnose all problems in time, and then it will last for many years.
Experienced car owners in the process of driving always listen to the operation of the car. The appearance of extraneous noise often indicates the occurrence of certain problems with the car, malfunctions on its various components and parts. Today we will talk about the causes of the noise of hydraulic lifters - devices that regulate automatic thermal gaps in the motor.
1 Why can knocks appear in hydraulic lifters?
If the hydraulic lifters fail completely, then they will not knock. But the appearance of extraneous noise always indicates some problems in the operation of the machine. Hydraulic lifters usually knock due to several common reasons:
- poor operation of the oil supply valve;
- use of low-quality oil;
- mechanical development on the surface of the plunger pair;
- the presence of air in the GC;
- dirty oil filter;
- contamination of oil channels;
- too fast heating of the motor;
- contamination of the hydraulic compensator;
- the appearance of air bubbles in the oil.
When any of the described problems appears, all hydraulic lifters begin to knock, although a breakdown can only be on a separate part. To determine the cause of the knock of hydraulic lifters, it is necessary to carry out a full diagnostics of the vehicle.
Car diagnostics usually begin with checking for a knock when the engine is cold and warm. The reasons for knocking on cold and hot can be different. So, if the hydraulic lifters knock on a cold engine, the problem is most likely related to the oil. If the oil has not been changed for a long time, then it needs to be changed. The cause of the knock may also be the hydraulic compensator valve, if it does not hold well, then when the engine is turned off, the oil can simply leak out.
A hot test can indicate the same problems, such as low-quality oil, dirty oil passages, or severe filter wear. But some malfunctions can only appear during such a check:
- breakdown of the oil pump;
- breakdown of the hydraulic compensator;
- increased seating of the hydraulic compensator.
It is far from always possible to find the cause of knocks on your own, therefore, if it is not possible to quickly identify a malfunction, it is better to contact a professional car service.
2 Is it possible to calculate the knocking valve cover yourself and fix the problem?
It is impossible to independently determine the only knocking hydraulic compensator. To do this, it is necessary to conduct special acoustic diagnostics, as well as a full test of all vehicle components for malfunctions. This can only be done in the service station, as you will need specialized equipment.
The easiest way to remove extraneous knocks in the details of the car is through a full repair after the diagnosis. Of course, you can try to eliminate knocks by flushing the device. But washing does not give a 100% guarantee of getting rid of noise, and it also requires some special skills. If the cause of the noise is a malfunction of other components and systems of the car or low-quality oil, then flushing will not give any results.
If the hydraulic compensator knocks only when the engine is cold, and when the engine warms up, the noise disappears, then the problem may be insufficiently heated oil. This is a common situation that does not harm the car, so drivers usually just turn a blind eye to it. If, however, with an increase in engine temperature, knocks do not disappear, you need to contact professionals to troubleshoot.
There is also a fairly simple way to eliminate knocks in the hydraulic compensator, which is suitable for Lada Priora and VAZ 2112. It involves eliminating knocks as follows:
- Turn the crankshaft until the valve corresponding to the knocking hydraulic compensator opens.
- Turn the valve and spring at an angle so that these parts move and return to their original positions.
- Start the engine. If the knocking does not go away, the problem is not solved and you still need diagnostics.
3 Rules for replacing hydraulic lifters with your own hands
If it is necessary to replace the hydraulic compensator, all the necessary work can be done independently, and the complexity of such repairs practically does not depend on the model of the vehicle. The principle of replacement is similar, but on some cars, at the same time as replacing the hydraulic compensator, it is also necessary to change the cover gasket.
We begin work by removing the valve cover, then remove the sprocket from the camshaft with a wire. Just hook the part with a wire and slowly lift it up. Now you need to visually inspect the tensioner and damper, if they are worn out, it is better to replace them with new ones too.
Next, remove the fasteners from the crankshaft and remove the bed, dismantle the rockers and fold them so that during the installation of the new device, you can maintain the order of their installation. The easiest way is to lay out the details by numbers. Now we proceed to dismantle the hydraulic lifters. Sometimes the removal of these parts requires the application of various efforts. There is nothing wrong. If you dismantle parts for their further cleaning, diagnostics and reinstallation, you also need to lay them out in order.
Now thoroughly clean and flush the oil line, as well as all places and components located near the installation site of new or old HAs. It remains only to install hydraulic lifters. You don't have to put in too much effort for this. With a strong impact during the twisting of the HA, it can be significantly damaged.
When the HAs are installed, you will only have to mount all previously removed parts in the same order. Be sure to carefully secure the valves in their places with a wide screwdriver.
You may not need to change the HA to new ones if your car has n52 hydraulic expansion joints. In them, extraneous noises very often appear due to insufficiently thick oil, and knocks can be eliminated by simply changing the lubricant. Of course, without diagnostics it is impossible to say for sure that it is the oil that is the cause of the problems, but sometimes it’s worth a try. If the noise does not go away after changing the oil, it remains only to go for diagnostics.
Sometimes the cause of noises and knocks is too slow driving. Very low speeds have a harmful effect on the engine and other vehicle components. It is recommended to always drive with gentle acceleration and gentle braking. Following this formula will not only save the engine from too much wear, but also reduce fuel consumption to a minimum.
4 What can the noise of hydraulic compensators lead to?
If your hydraulic expansion joints are rattling, the best solution would be a trip to a car service. If a complete diagnosis of the engine and other vehicle systems is not carried out in a timely manner, significant breakdowns, severe wear of the gas distribution mechanism, increased loads on the cylinder head and other components are possible. All this, if not repaired in time, can cause very significant financial costs.
Most often, if you immediately replace the entire set of HAs, knocks disappear without a trace, but not always. If, after installing new parts, noises and knocks persist, the problem may be hidden in external factors and other components of the vehicle. If new, newly installed hydraulic compensators rattle, there may be several reasons. Firstly, you could simply come across defective parts. Secondly, the reason may lie not in the HAs themselves, but in the valves. To check the valves, you need to make sure that they are fastened well, in some cases the parts do not shrink and create characteristic sounds. To make the noise due to the valves disappear, it is enough to tighten the bolts and fix them more securely in the car. If after that the noise does not disappear, it remains to go to the technical service.
Very often, extraneous sounds on the GC occur due to low-quality oil. It is very important to use the right oil for your vehicle. To choose the right oil, you should carefully read the vehicle manual and the information on the oil container before buying it. Different types of oil may have the same viscosity, but have different binding abilities. These parameters depend on the amount of additives in the composition. It is very important to check the certificates for the oil for the engine of your car by type.
The use of low-quality oil has an extremely negative effect on the condition of vehicle components. Saving on lubrication can lead not only to the appearance of extraneous noise on the hydraulic expansion joints, but also to the deterioration of the condition of many other parts of the machine. Try to keep an eye on your car, choose good oil and fuel for it, consult with professionals on all unclear issues, and then the car will serve you as long as possible, with a minimum number of breakdowns.