Bonneville V8-4.6L VIN Y (2004)
26. If cracks, scoring, pitting, and excessive corrosion are present in the caliper bores, replace the caliper assembly.
27. Inspect the caliper pistons for cracks, scoring, and/or damage. Replace the caliper pistons if any of these conditions exist.
Assembly Procedure
Notice: Refer to Fastener Notice in Service Precautions.
1. Install the valve stem seal (2) over the threaded end of the bleeder valve (1).
2. Install the brake caliper bleeder valve (1).
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Tighten the brake caliper, bleeder valve to 14 Nm (124 inch lbs.).
3. Install the brake caliper bleeder valve cap.
4. Lubricate the new piston seals (1) with Delco Supreme 11 (R), GM P/N 12377967 (Canadian P/N 99266-7) or equivalent DOT-3 brake fluid from
a clean, sealed brake fluid container.
5. Install lubricated piston seals (1) into the brake caliper bore seal grooves.
6. Make sure the seals are not twisted.
