Brake System Bleeding Chevrolet Camaro II

DESCRIPTION

Hydraulic system bleeding is necessary any time air has been introduced into system. Bleed brakes at all 4 wheels if master cylinder lines have been disconnected or master cylinder has run dry.

Bleeding may be done either by using pressure bleeding equipment or by manually pumping brake pedal and using bleeder tubes.

METERING VALVE DEACTIVATION

1. On disc brake equipped vehicles, the metering section of the combination valve must be deactivated before bleeding.
2. To hold the metering valve open to pressure bleed the front brakes, the valve stem must be pushed in or pulled out. Loosen front mounting bolt and install tool (J-23709) on the combination valve. Stem should be fully extended or depressed.

Deactivating Metering Valve for Bleeding (Typical). Scheme 1

MANUAL BLEEDING

1. Fill master cylinder. Install bleeder hose to first bleeder valve to be serviced. See Bleeding Sequence. Place other end of hose in clean glass jar partially filled with clean brake fluid so end of hose is submerged in fluid.
2. Depress brake pedal slowly through its full travel. Open bleeder valve 3/4-1 turn. Close bleeder valve. Release pedal. Repeat procedure until flow of fluid shows no signs of air bubbles.

Note. Check fluid level in master cylinder frequently during bleeding to insure air does not enter system.

PRESSURE TANK BLEEDING

1. Clean master cylinder cap and surrounding area, then remove cap. With pressure tank at least 1/3 full, connect to master cylinder using adapters. Attach bleeder hose to first bleeder valve to be serviced. See Bleeding Sequence. Place other end of hose in clean glass jar partially filled with clean brake fluid so end of hose is submerged in fluid.
2. 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.

Pressure Bleeder Installation (Typical). Scheme 2

PRESSURE BLEEDING SPECIFICATIONS

BLEEDING SEQUENCE

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 following sequence

BLEEDING SEQUENCE