Master Cylinder Replacement

Removal Procedure





1. Remove the brake master cylinder reservoir cover (1).





2. Remove the brake fluid from the brake master cylinder reservoir.
Discard the brake fluid in accordance with local regulations.





3. Remove the reservoir from the master cylinder body.
4. Remove power steering reservoir bracket bolt.
5. Remove the power steering reservoir bracket. Move power steering reservoir towards engine slightly.





6. Remove the brake pipes (1) from the master cylinder.
Plug the open brake pipes to prevent brake fluid from leaking onto painted surfaces and/or becoming contaminated.
7. Remove the master cylinder attaching nuts (2).
8. Remove the brake master cylinder.

Important: The seal should be replaced.





9. Remove the brake master cylinder seal (1) from the brake master cylinder.

Installation Procedure

Notice: When filling the master cylinder, use only Delco Supreme 11 (GM P/N 12377967) or equivalent DOT 3 brake fluid. Do not use a container which has been used for petroleum based fluids, or a container which is wet with water. Petroleum based fluids will cause swelling and distortion of rubber parts in the hydraulic brake system, and water will mix with brake fluid, lowering the boiling point. Keep all fluid containers capped to prevent contamination.





1. Install the brake master cylinder seal (1) to the brake master cylinder.





2. Install the brake master cylinder.

Notice: Refer to Fastener Notice in Service Precautions.

3. Install the brake master cylinder mounting nuts.
^ Tighten the nut to 22 Nm (16 ft. lbs.).
4. Install the brake pipes (1) to the brake master cylinder.
^ Tighten the brake pipe fittings to 16 Nm (12 ft. lbs.).
5. Install the power steering reservoir bracket.
6. Install the power steering reservoir bracket bolt.
^ Tighten the power steering reservoir bracket bolt to 7 Nm (62 inch lbs.).





7. Lubricate the reservoir grommets (1) and the reservoir flanges with brake fluid.
8. Install the reservoir to the master cylinder body.
9. Fill the reservoir with brake fluid. Refer to Fluid and Lubricant Recommendations.





10. Install the brake master cylinder reservoir cover (1).
11. Bleed hydraulic brake system. Refer to Hydraulic Brake System Bleeding.