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Home >> Cadillac >> 2021 >> CT4 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 46 (Disc Brakes) >> Repair Instructions >> Rear Brake Caliper Overhaul (J6G) >> Disassembly Procedure

Disassembly Procedure

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  1. GM5876674Courtesy of GENERAL MOTORS COMPANY

    Using a plastic tool, remove and DISCARD the 2 rear brake caliper piston boots (3).

  2. Place a 25 mm (1 in) block of wood between the caliper housing and the caliper pistons.
  3. NOTE:

    Protect the caliper painted surfaces while using the C-Clamp.

  4. Install a large C-clamp over the body of the brake caliper with the C-clamp ends against the outboard surface of the caliper body and against the block of wood.
  5. Remove the 2 rear brake caliper pistons (2) from the caliper bore by directing low pressure compressed air into the caliper bore through the brake hose inlet port.
  6. Remove the C-clamp from the caliper.
  7. Remove the block of wood from the caliper.
  8. Using a plastic tool, remove and DISCARD the 2 rear brake caliper piston seals (1).
  9. GM5876676Courtesy of GENERAL MOTORS COMPANY

    Using a plastic tool, remove and DISCARD the 2 rear brake caliper piston boots (1).

  10. Place a 25 mm (1 in) block of wood between the caliper housing and the caliper pistons.
  11. NOTE:

    Protect the caliper painted surfaces while using the C-Clamp.

  12. Install a large C-clamp over the body of the brake caliper with the C-clamp ends against the inboard surface of the caliper body and against the block of wood.
  13. Remove the 2 rear brake caliper pistons (2) from the caliper bore by directing low pressure compressed air into the caliper bore through the brake hose inlet port.
  14. Remove the C-clamp from the caliper.
  15. Remove the block of wood from the caliper.
  16. Using a plastic tool, remove and DISCARD the 2 rear brake caliper piston seals (3).
  17. GM5876672Courtesy of GENERAL MOTORS COMPANY

    Rear Brake Bleeder Valve Cap (1) - Remove [2x]

  18. Rear Brake Bleeder Valve (2) - Remove [2x]
  19. Clean the brake caliper piston bores with denatured alcohol, or equivalent.
  20. Inspect the caliper bores for cracks, scoring, pitting and corrosion.
  21. If cracks, scoring, pitting or corrosion exists, replace the brake caliper.