Rear Calipers

CAUTION: Do not place fingers in front of caliper piston when applying compressed air to remove piston. Serious injury may result.

Remove caliper from vehicle. Remove caliper pins and bushings and inspect for nicks or damage. Replace as necessary. Using a clean shop towel to pad interior of caliper, remove piston using low pressure compressed air at caliper inlet port. Or remove piston using a spanner wrench to remove threaded piston assembly out of caliper.
Using nonmetallic tools to avoid scratching, remove boot from piston. Remove piston seal from caliper. Inspect caliper bore for scoring, corrosion, nicks and wear. Remove bleeder valve. Remove pin boot, bolt boot, bolt and sleeve from caliper body. Remove pin bolt and pin sleeve from caliper support. Remove lever spring, if replacing spring.
Clean all parts with denatured alcohol. Dry with compressed air. Blow out passages in caliper and bleeder valves. Inspect caliper bore and piston for scoring, nicks, cracks, corrosion and wear. Replace as necessary. DO NOT hone caliper bore. Check seal groove for nicks or burrs, replace caliper housing if found. See Figure.
Install pin bolts and pin sleeves to caliper support. Lube outside diameter of boot with silicone grease. Install sleeve boot, with silicone grease, through caliper. Push bolt sleeve through lip end of boot until boot seats in sleeve groove at other end. Install bolt boot onto caliper body. Install pin boot over sleeve (installed on caliper support). Install lever return spring.
Install bleeder valves and tighten to specification. See TORQUE SPECIFICATIONS . Lubricate NEW piston seal and install into caliper bore groove. Lubricate boot and install onto piston. Install piston and boot into caliper bore, thread into bottom of caliper using spanner wrench. Seat boot ring into counter bore of caliper body. Ensure not to pinch boot. Remove any trapped air in boot. Boot must lay flat with caliper housing.