GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 2001 🢒 Aurora 🢒 Brakes 🢒 Disc Brakes 🢒 Rear Brake Caliper Overhaul

    Object Number: 105774 Size: SH
  1. Remove the rear caliper from vehicle. Refer to Rear Brake Caliper Replacement .
  2. Remove piston and piston boot by turning the piston (2) counterclockwise with a spanner type wrench.

    3. Important: Do not use a metal tool for removal of the boot ring or piston seal.


    Object Number: 517729 Size: SH
  3. Remove the boot ring from the groove in the caliper bore with a small wooden or plastic tool.

    4. Object Number: 517749 Size: SH
  4. Remove the piston seal with a small wooden or plastic tool.

    5. Object Number: 517735 Size: SH
  5. Remove the piston boot from the piston.

    6. Object Number: 517733 Size: SH
  6. Remove the bleeder valve from the caliper body.

    7. Important: The park brake lever, lever return spring and seal are the only components in the park brake mechanism that can be removed or replaced. Do not disassemble the park brake mechanism. Replace the caliper if the park brake is damaged or inoperative.

  7. Replace the lever return spring if damaged.

    8. Important: Replace the caliper piston if any of the internal parts are damaged.

  8. The brake caliper piston is replaced as an assembly.

    9. Object Number: 517748 Size: SH
  9. Clean all of the parts with denatured alcohol.
  10. Dry all of the parts with dry filtered compressed air.
  11. Blow out all of the passages in the caliper body and the bleeder valve.

    12. Important: The piston sliding surface is plated. Do not polish with emery paper.

  12. Inspect the piston for scoring, rust , wear, damage, or presence of foreign objects. Replace the piston if any of these conditions have occurred.

    13. Important: Use new brake fluid to clean the caliper cylinder, do not use mineral oil.

    Minor damage from light rust or foreign objects may be eliminated by polishing the cylinder surface with a fine emery paper.

  13. Inspect the inside surface of the cylinder for scoring, rust, wear, damage, or presence of foreign objects. Replace the caliper body if any of these conditions have occurred.
  14. Install the bleeder valve in the caliper body.

    15. Object Number: 517749 Size: SH
  15. Lubricate the new piston seal with clean brake fluid .
  16. Install the piston seal in the caliper bore.

    17. Object Number: 517735 Size: SH
  17. Install the new boot on the piston.

    18. Object Number: 105774 Size: SH
  18. Screw the piston (2) into the caliper body (1) with a spanner type wrench.

    19. Object Number: 517755 Size: SH
  19. Install the boot ring inside the caliper counterbore against the piston boot.
  20. Install the caliper onto the vehicle. Refer to Rear Brake Caliper Replacement .