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Home >> Buick >> 2004 >> Century Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 143 (Disc Brake System) >> Repair Instructions >> Brake Caliper Overhaul - Rear >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
    CAUTION: Refer to Brake Dust Caution in Cautions and Notices.
    CAUTION: Refer to Brake Fluid Irritant Caution in Cautions and Notices.
    NOTE: Refer to Brake Fluid Effects on Paint and Electrical Components Notice in Cautions and Notices.
  1. Remove the rear brake caliper from vehicle. Refer to Brake Caliper Replacement - Rear (RPO J65, JL9) .
  2. IMPORTANT: If the brake caliper was leaking brake fluid from the REAR of the caliper past the integral park brake actuator shaft seal, replace the brake caliper assembly. The park brake integral mechanism contains a non-serviceable seal which may be allowing brake fluid to leak past it and into the non-serviceable integral park brake mechanism.
  3. Drain the brake fluid from the caliper assembly.
  4. Using a small wooden or plastic tool, carefully remove the brake caliper piston dust boot seal retaining ring from the groove in the caliper seal counterbore.
  5. Fig 1: Removing Brake Caliper Piston Dust Boot Seal Retaining Ring
    GM517729Courtesy of GENERAL MOTORS CORP.
  6. Place a block of wood against the inside of the caliper body, opposite of the caliper piston.
  7. Direct low pressure compressed air through the caliper inlet hose to remove the caliper piston.
  8. Fig 2: Removing Brake Caliper Piston Using Low Pressure Compressed Air
    GM698626Courtesy of GENERAL MOTORS CORP.
  9. Remove the piston dust boot seal (2) from the seal counterbore in the caliper and discard the dust boot seal.
  10. Fig 3: Exploded View Of Brake Caliper
    GM779716Courtesy of GENERAL MOTORS CORP.
  11. Using a small wooden or plastic tool, remove the piston seal from the caliper bore and discard the piston seal.
  12. Fig 4: View Of Piston Seal
    GM517749Courtesy of GENERAL MOTORS CORP.
  13. Inspect the operation of the integral park brake mechanism. Rotate the park brake lever back and forth while observing the movement of the park brake mechanism actuator assembly in the caliper bore.
  14. IMPORTANT: The park brake lever, lever return spring and actuator shaft seal are not serviceable components of the integral park brake mechanism. Do not disassemble the integral park brake mechanism.
  15. If the integral park brake mechanism was not operating properly (binding or seized), replace the brake caliper assembly.