Clutch system, bleeding

WARNING: This page is about a different car, the 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Special tools, testers and auxiliary items required

Fig 1: Identifying Brake Filler And Bleeder Unit VAS 5234

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Brake filling and bleeding unit VAS 5234

Brake fluid specification

Refer to 47 - BRAKES - HYDRAULIC COMPONENTS

NOTE:

Open bleed valve before switching on bleeding appliance.
When performing the following steps, make sure that no brake fluid escapes onto the transmission.
Performing work on the hydraulic clutch mechanism the clutch system must be bled.
Pull out clutch pedal and fill brake fluid reservoir with brake fluid up to "max." mark before bleeding.

Connect brake filling and bleeding unit VAS 5234, but do not turn on at this time.
If installed, remove noise insulation beneath transmission.

Fig 2: Connecting Bleeder Hose To Clutch Slave Cylinder

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect bleeder hose -A- to slave cylinder (arrow) and open bleeder valve.
Connect bleed hose to pressure hose of collector bottle.
Switch on bleeding appliance and allow about 100 cm3 of brake fluid to flow out.

Working pressure 2.5 bar

NOTE: Make sure bleed hose is correctly installed during bleeding operation.

Tighten bleed valve to 4.5 Nm.
Depress clutch pedal several times after bleeding process.
Bleed again if necessary.