Pressure Bleeding
WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 1991 Pontiac Grand Prix, 1991 Oldsmobile Cutlass Supreme, 1991 Chevrolet Lumina, 1991 Buick Regal, and 1990 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Before bleeding system, exhaust all vacuum from power unit by depressing brake pedal several times. Bleed master cylinder if equipped with bleed screws, then bleed wheel cylinders or calipers in sequence.
- Depressurize ABS system (if equipped). Clean master cylinder cap and surrounding area, then remove cap. With pressure tank at least 1/3 full, connect to master cylinder using adapters. See Fig 1 . Attach bleeder hose to first bleeder valve to be serviced. Bleeding sequence is RR, LF, LR, RF. Place other end of hose in clean glass jar partially filled with clean brake fluid so end of hose is submerged in fluid.
- Open release valve on pressure bleeder. Unscrew valve 3/4-1 turn noting fluid flow. When fluid flowing from cylinder to cup is free of bubbles, close bleeder valve securely. Bleed remaining cylinders in correct sequence and in same manner. Remove tool from combination valve.