Cause | Method of elimination |
The clutch is jerking | |
| Idle speed too low | Adjust the speed |
| Engine and gearbox bearings have failed | Check and replace if necessary |
| The gearbox suspension is weakened | Tighten the mounting screws |
| The pressure plate transmits movement in jerks | Replace the pressure plate |
| The driven disk does not correspond to the original VW for this engine model | Install the slave disk according to the original VW |
| Misalignment of the crankshaft and gearbox shaft rotation axes | Check the alignment of the engine and gearbox |
| The release bearing operates on one side | Check the release bearing |
| Incorrect positioning of the clutch cable guide | Position the cable guide correctly |
The clutch is slipping | |
| The driven disk is worn out | Check the thickness of the driven disk, replace if necessary |
| The slave cylinder is bitten* | Replace the slave cylinder |
| The membrane springs are too weak | Replace the pressure plate |
| The slave cylinder is leaking* | Conduct an external inspection |
| The friction linings are hardened or oily | Replace the clutch slave disc |
| The clutch is overheated | Install parts according to VW original |
The clutch disengages poorly | |
| Wear of friction linings due to abrasion | Replace the clutch slave disc |
| The driven disk is jammed on the drive shaft. The spline connection is dry or clogged with wear products | Clean the splines, remove burrs, remove rust if necessary, apply fresh grease, such as MoS2 powder |
| Lateral play of the driven disk | Check the driven disk at a service station, replace it |
| Master cylinder leaking* | Observe with the clutch pedal depressed whether the brake fluid is bubbling in the reservoir; if necessary, bleed the air from the system or replace the master cylinder |
| The clutch pedal does not press all the way down | Check if the clutch pedal can be pressed all the way down; cut the mat if necessary |
| The release bearing is faulty | Check the bearing for serviceability |
| Air in the hydraulic system* | Bleed the clutch hydraulics |
| The automatic clutch cable adjustment mechanism is faulty | Replace clutch cable** |
| The guide bearing of the gearbox drive shaft on the crankshaft is faulty | Replace the guide bearing on the crankshaft |
| The driven disk is severely bent or the friction linings are broken | Replace the slave disk |
Noises when operating the clutch pedal | |
| The release bearing is faulty | Check the release bearing, replace |
| The driven disc hits the pressure plate | Replace the slave disk |
A noise that increases and decreases when accelerating or decelerating or when driving with the clutch disengaged | |
| Heavy running spring separator (torsion shock absorber) driven clutch disc | Replace the slave disk |
| The clutch rivets have become loose | Replace the clutch |
| Clutch imbalance is too great | Replace the clutch and driven disc |
* Applies to hydraulic clutch only
** For mechanically driven clutch only
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