September 20, 2019 Lada.Online 10 777 0
To identify the noise of the clutch release clutch on LADA Vesta, Granta, Kalina, Priora, XRAY AMT, Lada 4×4 cars, a special technique was compiled at AVTOVAZ. Specialists of LADA dealership centers refer to this instruction. The methodology was sent to the Lada.Online website by one of the site’s readers.
When assessing the malfunction of the clutch release bearing, it is necessary to take into account that at the moment all cars produced by JSC AVTOVAZ use a clutch without clearance, so the clutch release bearing is always preloaded and rotates with the engine running.
What is a release bearing and its role?
Layout of the release bearing in the clutch mechanism
The clutch release bearing comes into play when gears are changed, providing communication between the clutch discs, so when the first signs of a malfunction appear, you should immediately begin repairing it in your garage or by contacting a car repair shop.
The release bearing comes into play when gears are changed, providing communication between the clutch discs/
There are two types of this part: roller (ball) and hydraulic. How do they work? Everything is quite simple: the chain of action of the mechanism begins at the moment when the driver presses the clutch pedal, then the fork acts on the slave cylinder, after which the two clutch discs are disconnected, and for them to come together again, this spare part exists. We figured out why a release bearing is needed. Why do problems sometimes occur in the clutch system? Malfunctions arise due to excessive loads, usually experienced by novice motorists when they hold the clutch pedal . This is a very small round part, but when driving it bears a great responsibility; if a breakdown occurs, it is not possible to drive the car. The price of a new spare part ranges from 400 rubles to 4,500 thousand rubles, depending on the country of origin. Where is the clutch release bearing located? It is located in the part where the gearbox is connected to the clutch, that is, on the input shaft of the box.
Clutch slipping after replacing all its parts
After replacing all elements, adjustment is required, but many car owners ignore this point. The cause is slipping, the car accelerates slowly, the engine speed does not correspond to the speed of the car. The engine just roars, and the car is driving quite slowly, as they say, slipping.
In cars with a mechanical clutch cable, adjustment is made by the cable itself. In hydraulically driven machines, this process is carried out using a clutch rod. In modern cars, you often come across rods that do not have adjustments. But this does not mean at all that it cannot be produced. In such cases, adjustment of the clutch pedal itself is provided, but not everyone knows about this possibility.
The machine often slips due to wear on the flywheel surface in the place where the surface works in tandem with the driven disk. The mistake of many car owners is that they first of all change the disk, while completely forgetting about the flywheel. As a result, you have to disassemble the car twice to fix the problem.
Signs of a faulty release bearing
To be confident in your car, rule out the following signs of trouble:
- when squeezing the clutch, a repeated knock or noise appears (the release bearing is humming), but with uniform movement without changing gears, these sounds do not exist;
- There are difficulties with shifting gears, most often this applies to reverse gear;
- changing gears becomes impossible.
All of the above factors require diagnostics for malfunction. The question arises: how to check the release bearing? It's not difficult at all. You need to listen to the sounds made when squeezing the pedal; extraneous noise in the area of the box will indicate a breakdown. The characteristic “death” squeal in the car is the main sign that the part needs to be changed urgently, otherwise a situation will arise when the release bearing jams at the most inopportune moment. If you feel that the release bearing is noisy or whistling when it is cold, then evaluate all the risks, and when deciding whether it is possible to drive with noise, it is better to answer - no. On average, it operates without breakdowns for about 150 thousand km; this part is highly durable and reliable.
Lada Granta - eliminating noise (crackling/creaking) from the clutch pedal.
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Source
How to remove and replace a release bearing
Removing the release bearing
An important rule for the release bearing: it should not “play” or move unevenly or spasmodically.
If repairs are necessary, you will have to disassemble the entire gearbox, because... the required part is inside it. Next, the spring clamp is released from tension, and the bearing itself is removed. To do this, you will need a tool, because you will have to remove it from the spring “legs” of the holder. Remove from the bushing, removing the retaining springs, and disconnect from the coupling. The removed part is inspected for cracks and other external signs of failure. It is more reliable to install a new spare part, since it is relatively inexpensive. After all actions, lubricate. How to lubricate the release bearing? Some people prefer molybdenum grease, others prefer graphite; parts are usually supplied with it when purchased in a store. An important rule for a bearing: it should not “play” or move unevenly or spasmodically. How to lubricate the release bearing without removing the box? You will have to contrive, it is almost impossible to provide good thorough lubrication without removing the gearbox. In any case, if the bearing hums, it is best to replace this part with a new one! Beginning motorists may have difficulties with how to change the clutch release bearing; this is quite a troublesome undertaking if there are no basic repair skills. That's why some people turn to a car service center for help. How much does it cost to replace a throwout bearing? This procedure will cost approximately from 2000 to 5000 thousand rubles.
Which bearing is better
Many car owners try to replace it with a “original” part from the car manufacturer. But, for example, domestic spare parts from Lada cannot be characterized as the most durable and durable. Popular models are from the German company Sachs or the official supplier for our AvtoVAZ - the Italian bearing Coram. The price leader is Sachs; this is an inexpensive and acceptable quality alternative to replacing a faulty part. You can also choose EXEDY and SASSONE from more inexpensive models.
Adjusting the clutch system and release bearing
If the clutch mechanism is not working properly, the car moves jerkily, jumpily, the lever sinks, and various sounds are emitted from the box.
Good performance properties of a car depend on the quality of operation of three motion systems: gas, brake and clutch mechanisms. To adjust the clutch, sometimes it is enough to adjust the drive; in other cases, repair and replacement will be required. Adjustments must be made on time to avoid breakdowns that require large financial costs. The main signs of a malfunctioning clutch mechanism: the car moves jerkily, jumpily, the lever sinks, various sounds the gearbox Ideally, after depressing the pedal, the car should move slowly and smoothly. Sometimes a lot depends on the little things, and it would seem that such a small part of a large machine, like a release bearing, is a drop in the bucket. But in practice, everything is not so; even the smallest particle that has become unusable requires attention. An experienced driver will be able to repair or replace the release bearing; a beginner will most likely go to the nearest service station or try to solve the problem on his own by reading this article. Good luck on the roads!
Howl and noise of the VAZ Lada gearbox, hum, crunching of the manual transmission, their causes, ways to get rid of them
Why does the gearbox howl and make noise on VAZ and Lada cars? Causes of manual transmission hum. Remedies
Everyone is already accustomed to the fact that on VAZ and Lada cars one can hear hums, howls, noise, and sometimes crunching when switching. Both on Vesta, Grant, Kalina, Priora, Largus, X-ray, and on younger models, such as classic or tenth family, or on Niva, owners have the opportunity to “enjoy the singing” of the gearbox. Few people like it, so almost everyone is trying to eliminate it. In order to do this, we need to establish the causes of unpleasant sounds, and they can be different.
One of the most common manifestations of gearbox noise is wear of the bearings of the primary or secondary shafts, as well as the bearing of the drive gear. If the transmission makes noise at neutral speed, especially when the clutch is depressed, the reason lies in the bearings of the input shaft and/or drive gear. The howl when braking with the gearbox is caused by a worn secondary shaft bearing. There is only one way out - replacing “tired” bearings.
Also, very often the howl and hum of a manual transmission is caused by a banal lack of lubricant. Oil can leave the box through leaky seals, and sometimes it happens that it is not topped up even from the factory. A lack of oil is fraught not only with unpleasant noise from the gearbox, but also with accelerated wear of manual transmission gears and overheating. Therefore, we recommend that you regularly monitor the oil level not only in the engine, but also in the gearbox, as well as the condition of the oil seal group. Rumble, extraneous sounds and uncomfortable gear shifting can be caused not only by a lack of oil in the box, but also by low-quality, counterfeit oil. I would also like to draw your attention to the fact that the oil in a manual transmission also needs to be replaced approximately every 70 - 80 thousand km. mileage, as it also becomes dirty and loses its properties. The words that it is flooded for the entire service life of the box should not be taken seriously, since, in this case, there is a big chance to reduce the resource of the manual transmission (indeed, it turns out that for the entire service life of the manual transmission, however, it is not long enough). Also, worn oil will certainly affect the comfort of gear shifting.
