Bleeding the brakes (VW Golf 3)

Air must be removed from the hydraulic system if the tightness of the brake line network is compromised at any point or if air begins to enter the system in another way.

Before removing air from the unit, remove dirt and foreign bodies from the areas intended for air removal, and remove the tank filler plugs.

If only one wheel brake cylinder or brake seat was isolated, it would be sufficient to bleed only that particular brake circuit. i.e. front left and rear right or front right and rear left. Otherwise, bleed starts either at the rear wheels or at the front, but the manufacturer's recommended sequence is: rear right, rear left, front right and front left.

After removing the dust cap, place a clear plastic hose on the appropriate air valve. Hang the other end of the hose in a glass container filled with some brake fluid.

Have your assistant press the brake pedal to the floor. If the pedal touches the floor, open the screw plug covering the air outlet hole by half a turn. Observe the flow of fluid coming out of the hose.

Once the air bubbles stop coming out, all the air has been released from the unit. Keep the brake pedal pressed to the floor during the last stroke, close the air valve. Slowly release the pedal.

Perform the same operations in the indicated sequence with the other threaded plugs that close the air outlet holes.

Once again, pay attention to the fact that the brake fluid level must be monitored continuously to prevent air from being sucked into the system. Never pour fluid that has been pumped out of the system back into the reservoir. Also, do not use fluid that has been stored open for a long time.