In order to service and repair the front brake caliper, start by removing the brake caliper from the vehicle. Apply low pressure compressed air in order to extract brake caliper
Pistons from the bore of the caliper through the fluid inlet hole of the brake, after which remove the Piston boots and Piston seals. Remove the brake caliper bleed screw cap and the brake caliper bleed screw . Crack the potector clamp just enough to inspect the brake caliper bores and Piston seal grooves for any scoring or corrosion; if seriously damaged, change the brake caliper housing. Check the heat affect zone (HAZ) of the brake disc surface for the presence of cracks. If there are cracks, the disc should be replaced. Clean the guiding surfaces of the brake pad on both brake caliper housing and mounting bracket, but no with the help of abrasives and all other parts that are not included in the repair kit to be cleaned with denatured alcohol before drying them filtered unlubricated compressed air. Clean out all passages in the brake caliper housing and the bleeder valve; run a visual check for any cracks, scoring, pitting, rust, or corrosion within the caliper bores. If there is visible rust or corrosion, try to eliminate it using fine emery paper; in any case, caliper assembly should be replaced if unsuccessful. Assemble the brake caliper bleed screw and tighten it until its torque to 12nm (106 inch lbs.), then put back the bleed screw cap. Apply delco supreme 11 (R), (GM p / n 12377967) or equivalent dot-3 brake fluid to the new Piston seals, and install them to brake caliper bore seal grooves making sure that they are not twisted. Apply brake fluid to lubricate the brake caliper bores and Piston, then clip the boot, and seat the Piston and and boot into both the Piston groove and brake caliper bore groove. Do this for the other Piston and finally install the brake caliper back onto the vehicle.