The clutch release bearing, also known as the clutch throwout bearing, is a key component in the automobile clutch system. It is located between the clutch pressure plate and the release fork, and is responsible for pushing the pressure plate when the clutch pedal is pressed to separate the clutch plate from the flywheel, thus cutting off the power transmission between the engine and the drivetrain and allowing the driver to shift gears smoothly.
When the clutch release bearing is worn or damaged, the following noticeable symptoms may occur:
- Noise when clutch is depressed: When the clutch pedal is depressed, a “rustling”, “clattering” or sharp metallic friction sound may be heard. This sound is usually especially noticeable when the clutch pedal is fully released or lightly depressed, indicating that the release bearing may be rubbing due to lack of lubrication or wear.
- Persistent noise: If a persistent noise is heard during driving, especially in semi-coupling, this may be a sign of damage to the release bearing.
- Difficulty in starting the engine: When the vehicle is starting, if the clutch release bearing is damaged, it may cause the engine to be difficult to start, especially when it is put into gear, because the clutch cannot be completely separated, resulting in poor power transmission.
- Gear impact sound when shifting gears: the problem of release bearing will lead to gear impact sound when shifting gears, and it becomes difficult to hang gears, which is because the separation is not complete and the gears can not be smoothly engaged.
- Stalling by depressing the clutch while idling: Depressing the clutch pedal while the engine is idling may cause the engine to stall immediately, indicating that abnormal friction in the release bearing is affecting power transmission.
- Pedal operation feels abnormally heavy: Damaged bearings may cause the pedal to feel abnormally heavy during operation, as bearing damage may affect the normal operation of the clutch system.
- Clutch does not engage smoothly: When starting, if the clutch does not engage smoothly, the vehicle may shudder, which is also a sign of a release bearing problem.
- Clutch slipping: Due to clutch slipping, even if the engine speed increases, the vehicle speed increase will be limited, and it feels like the vehicle accelerates weakly.
- Prolonged abnormal work: Prolonged abnormal work may lead to overheating of the bearing, further aggravating the wear.
The cost of replacing the clutch release bearing may vary depending on the model, brand, quality of parts and repair location. The following is a rough cost estimate:
- Basic model release bearing: the price is usually between RMB100 and RMB500, depending on the model and brand.
- Clutch 3-piece set (including release bearing, pressure plate and friction plate): If you choose to replace the whole clutch 3-piece set, the material cost will be around RMB 300 to RMB 500. For high-end models or imported cars, the cost may be higher.
- Ordinary garages: the labor cost usually ranges from RMB 300 to RMB 1,000, depending on the skill level of the repair point and the labor cost of the area where it is located.
- 4S store: The labor hourly fee for 4S store is usually higher and may be between RMB 500 and RMB 1,500 or even higher, especially in big cities or 4S stores of luxury brands.
- Replacing the release bearing alone: If only the release bearing is replaced, the overall cost usually ranges from 500 RMB to 2,000 RMB, depending on the model and repair location.
- Replacement of clutch three-piece set: If the clutch pressure plate and friction plate are replaced at the same time, the total cost may increase to RMB 1,000 to RMB 3,000, depending on the pricing of the repair shop.
- Domestic cars: the cost of replacing the clutch release bearing within China will probably fall in the range of RMB 1,200 to 1,600. If you choose to go to a specialized garage you may be able to enjoy a more favorable price, which is usually between 900 and 1,200 RMB.
- Imported cars: due to the specificity and scarcity of its parts, the repair cost will rise accordingly, and is expected to be between 1,600 and 2,200 yuan.
In order to extend the service life of the clutch release bearing and the whole clutch system, the following maintenance measures are recommended:
- Avoid pressing the clutch frequently and sharply, and maintain smooth driving habits. Gentle operation can reduce the impact on the release bearing and prolong its service life.
- Avoid depressing the clutch for a long time or leaving the car in neutral during driving, which will help reduce the burden on the clutch system and prevent premature wear.
- Regularly check the working condition of the clutch, including the feeling of the clutch pedal and the smoothness of the gearshift. If problems are found, deal with them in time to avoid small problems from turning into big failures.
- Ensure that the inside of the clutch system is clean to avoid the entry of dust and impurities and reduce wear and tear. For non-hydraulic release bearings, apply appropriate amount of grease regularly to ensure smooth rotation of the bearing.
- Clutch system is easy to wear out when it is used in high temperature, try to avoid long time in high load condition (such as frequent city traffic, climbing slope, etc.) to reduce the wear of release bearing.
- If the friction plate is found to be stained with oil or rust, be sure to remove and clean it to ensure that it is clean and dry. If the friction discs are severely worn (e.g. rivet heads, cracks, breaks or burns), always consider replacing them with brand new friction discs to ensure that the performance of the clutch is restored.
The clutch release bearing is an important part of the automobile clutch system, playing the role of separating the clutch pressure plate and flywheel. The release bearing may need to be replaced when it develops a strange noise, operates poorly or the clutch fails to fully disengage. The cost of replacing a clutch release bearing includes the cost of parts (100-500 RMB) and labor (300-1000 RMB), with the overall cost usually ranging from 500 to 2000 RMB. If the clutch pressure plate and friction plate are replaced at the same time, the total cost may be higher.
After replacement, vehicle owners should pay attention to smooth driving, avoid excessive idling, and regularly check the working condition of the clutch system to ensure the long-term normal operation of the release bearing and the whole clutch system. Proper usage habits and regular maintenance can effectively extend the service life of the clutch system and reduce the need for future repairs.