Clutch System, Bleeding
Clutch System, Bleeding
Special tools, testers and auxiliary items required
• Brake Filler/Bleeder Unit (VAS 5234)
• Specification of brake fluid, refer to => Brakes and Traction Control Brakes and Traction Control
Procedure
• After working on the hydraulic clutch mechanism, the system must be bled.
• Before bleeding, you must bring clutch pedal back to rest position and fill brake fluid reservoir to "max" mark with brake fluid.
• First open bleeder valve, before switching on brake filler/bleeder unit.
• For the following work step, make sure no brake fluid leaks onto transmission.
• Perform clutch system bleeding in intervals with brake system bleeding.
- Connect Brake Filler/Bleeder Unit (VAS 5234) but do not switch on yet.
- Remove rear noise insulation - 2 to 3 - if equipped.
Vehicles with 6 and 8-cylinder engine.
- If equipped, remove noise insulation cover - arrows - in left wheel housing.
- Remove left drive axle heat shield - arrows -.
Continued for all vehicles
- Connect bleeder hose - A - to clutch slave cylinder - arrow - and open bleeder valve.
- Connect bleeder hose with collector bottle vacuum hose.
- Now switch on brake filler/bleeder unit and bleed approximately 100 cm3 of brake fluid.
• Working pressure 2.5 bar
• Ensure correct bleeder hose seating during bleeding process.
- Close bleeder valve with 4.5 Nm.
- Depress clutch pedal several times after completion of bleeding process.
- Bleed system again if necessary.
- Attach drive axle heat shield to the transmission, if equipped.
Tightening Specifications