Bleeding air using a pressure bleeding kit (VW Golf 4)

To remove air from the hydraulic system, it is necessary to use special equipment that operates under external pressure (inflated spare tire tube). After connecting the sealed chamber with brake fluid to the brake system expansion tank, air removal consists of draining the fluid through the bleed nipple on the clutch slave cylinder until the flowing fluid comes out without air bubbles.

Warning: Volkswagen recommends using compressed air supplied at a pressure of no more than 2.5 bar.

Using this method with a large fluid reservoir provides additional protection for the hydraulic clutch system from possible air ingress during bleeding.

Execution order

1. Connect the pressure bleeding device to the brake system reservoir according to the instructions.

(The text is copied from this portal: «www.vwmanual.ru»)



2. Put on the transparent hose (for example VAG 1238 B/3) on the bleed nipple of the clutch slave cylinder (B), the other end of which is lowered into a glass container partially filled with brake fluid.

3. Unscrew the bleed screw half a turn and allow the liquid to drain into the glass container until it comes out without air bubbles.



4. After bleeding the hydraulic clutch system, screw in the bleeder nipple, remove the hose from it and remove the device from the replenishment tank.

5. Clean the bleed nipple from brake fluid and install the dust cap on it.

6. Check the brake fluid level in the reservoir and add brake fluid if necessary.