Front

Brake Caliper Overhaul - Front

Disassembly Procedure
1. Remove the caliper (1) from the vehicle. Refer to Brake Caliper Replacement - Front. Brake Caliper Replacement- Front
2. Remove the caliper set ring (3).
3. Remove the piston boot (2).

Caution: Do not place your fingers in front of the piston in order to catch or protect the piston while applying compressed air. This could result in serious injury.

Caution: Wear safety glasses in order to avoid eye damage.

Notice: Use just enough air pressure to ease the piston out of the bore. You can damage a blown-out piston even with the padding.

4. Insert a shop cloth (2) into the caliper in order to catch the piston.
5. Apply compressed air to the caliper brake hose connector hole in order to remove the piston from the caliper.
6. Remove the piston seal.
7. Remove the bleeder valve cap (13).
8. Remove the bleeder valve (12).

Important: DO NOT use abrasives in order to clean the caliper components.

9. Clean the following components in denatured alcohol or an equivalent brake parts cleaner:
^ The caliper set ring
^ The piston
^ The caliper bracket
^ The caliper housing
10. Dry the components using Unlubricated, compressed air.
11. Blow out all passages in the caliper housing and the bleeder valve.

Inspection Procedure
1. Inspect the guide surfaces of the caliper bracket (14) for corrosion and wear. Replace the bracket if the bracket is damaged. Refer to Brake Caliper Bracket Replacement - Front.
2. Inspect the following components for damage, wear or corrosion:
^ The caliper housing (10)
^ The caliper bracket
^ The piston (8)
^ The piston seal (9)
^ The piston boot (7)
^ The caliper set ring (6)
3. Replace the components if damage, wear or corrosion is evident.
4. Inspect the caliper bore for cracks, scoring, pitting, or corrosion. Replace the caliper if the bore is damaged.

Assembly Procedure

Notice: Refer to Fastener Notice in Cautions and Notices.

1. Install the bleeder valve (12) to the caliper.
Tighten
Tighten the bleeder valve to 8.3 N.m (73.46 lb in).
2. Install the bleeder valve cap (13).
3. Lubricate the following components with Delco Supreme 11 brake fluid, GM P/N 12377967 (Canadian P/N 992667), or an equivalent DOT 3 brake fluid:
^ The caliper bore
^ A NEW piston seal (9)
^ The piston (8)
^ A NEW piston boot (7)
^ A NEW set ring (6)
4. Install the piston seal into the caliper bore. Verify the seal is not twisted.
5. Install the piston into the caliper bore.
6. Install the piston boot over the piston.
7. Install the set ring.
8. Install the caliper to the vehicle. Refer to Brake Caliper Replacement - Front.