Clutch hydraulic system, bleeding

WARNING: This page is about a different car, the 2008 Audi A4, 2007 Audi A4, 2006 Audi A4, and 2005 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 filler bleeder unit VAS 5234

Brake fluid specification → 47 - BRAKES - HYDRAULIC COMPONENTS .

Procedure

NOTE:

Open the bleeder valve before switching on the bleeding appliance.
When performing the following steps, make sure that no brake fluid escapes onto the transmission.
The clutch system must be bled after performing work on the hydraulic clutch mechanism.
Before bleeding the clutch system, pull out clutch pedal and top off brake fluid to "Max" marking on brake fluid reservoir.
The clutch hydraulic system should be bled at the same intervals as the brake system.

Connect brake filler bleeder unit VAS 5234, but do not switch on.
If installed, remove sound insulation beneath transmission.

Fig 2: Axle Shaft Shielding Plate

Courtesy of VOLKSWAGEN UNITED STATES, INC.

If installed, remove heat shield - arrows - for drive axle (left-side).

Fig 3: 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 bleeder hose to pressure hose of fluid collector bottle.
Switch on bleeder appliance and allow about 100cm³ of brake fluid to drain out.

Operating pressure 2.5 bar

NOTE:

Make sure bleeder hose is correctly installed during bleeding operation.

Close bleeder valve and tighten to4.5Nm.
Depress clutch pedal several times after bleeding process is completed.
Repeat bleeding procedure if necessary.
If installed, screw heat shield for drive axle (left-side) onto transmission.

Tightening torques

Component		Nm
Heat shield for drive axle to transmission		23