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Home >> Chevrolet >> 2002 >> Chevy Express G1500, Van Cargo, 4.3 W >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Disc Brakes & Drum Brakes >> Overhaul >> Brake Caliper >> Disassembly

Brake Caliper: Disassembly

  1. Remove the fluid from the caliper.
    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.
    NOTE: Use just enough air pressure to ease the piston out of the bore. You can damage a blown-out piston even with the padding.
  2. Remove the brake pad. Clean the interior of the caliper with clean shop towels.
  3. Remove the piston.
    • Direct compressed air into the caliper fluid inlet.
    • Use just enough air pressure to ease the piston out of the bore.
  4. Remove the boot using care not to scratch the housing bore. Remove the piston seal with a nonmetal type of tool. See Figure .
  5. Remove the bleeder valve.
  6. Use denatured alcohol in order to clean the following parts:
    • The bleeder valve.
    • The caliper bore.
    • The caliper passages.
    • The piston.
  7. Use dry, filtered, compressed air to dry the parts and to blow out the passages.
  8. Replace any piston with the following conditions:
    • Scoring
    • Nicked
    • Corroded
    • Worn
    • Damaged Chrome Plating
  9. Replace any caliper bore or seal groove with the following conditions:
    • Scoring
    • Nicked
    • Corroded
    • Worn
  10. Attempt to remove any light corrosion on the caliper bore or seal groove using a fine crocus cloth.
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