CTS RWD V8-6.2L SC (2009)
15. Remove the caliper from the vise and clean the entire caliper with denatured alcohol, or equivalent.
16. Dry the caliper piston bores with non-lubricated filtered air. Make sure the external crossover pipe and the internal fluid ports are clean and free of
obstructions.
17. Inspect the caliper cylinder bores and piston seal counter-bores for scratches, cracks, pitting, and/or corrosion.
Note: Do not clean the caliper piston bores by honing or cleaning with abrasives.
18. If the caliper piston bores are scratched, cracked, or pitted, or if corrosion cannot be cleaned with denatured alcohol, replace the caliper assembly.
Assembly Procedure
1. Assemble the brake caliper piston (1) to the dust boot seal (2). Ensure the dust boot seal is properly seated on the piston, in the dust boot seal
groove.
2. Lubricate the new piston seals (3) with GM approved brake fluid from a clean, sealed brake fluid container.
3. Install the lubricated new piston seals into the brake caliper bore seal grooves. Ensure sure the seals are not twisted.
4. Apply a thin coat of GM approved brake fluid from a clean, sealed brake fluid container, onto the caliper piston bores and the outer surface of the
caliper pistons.
5. Install the piston and dust boot assemblies into the correct caliper bores. Press the pistons and dust boot seals all the way in by hand.
6. Place a clean, discarded brake pad or the fabricated 127 mm (5 in) long block of wood over adjoining piston bores and apply light pressure with
non-marring C-clamp. This will ensure the dust boots and pistons are fully seated into the caliper.
7. Repeat step 6 for the opposite pistons.
Caution: Refer to Fastener Caution (See: Service Precautions/Vehicle Damage Warnings/Fastener Caution).
8. Install the brake caliper bleeder valves and tighten to 14 Nm (124 lb in).
9. Install the brake caliper bleeder valve caps.
10. Install the caliper to the vehicle. Refer to Front Brake Caliper Replacement (JE5, J55 (RWD)) (See: Removal and Replacement/Front Brake
Caliper Replacement (JE5, JL55))Front Brake Caliper Replacement (JE5, JL55 (AWD)) (See: Removal and Replacement/Front Brake Caliper
Replacement (JE5, JL55))Front Brake Caliper Replacement (J56) (See: Removal and Replacement/Front Brake Caliper Replacement (J56)).
