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Home >> Pontiac >> 2009 >> Vibe Base, 2.4 0, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 36 (Disc Brake System) >> Repair Instructions >> Front Brake Caliper Overhaul >> Disassembly Procedure

Disassembly Procedure

WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Applying Air To Brake Caliper
    GM1363959Courtesy of GENERAL MOTORS CORP.
  1. Drain all the brake fluid from the caliper.
    2. WARNING: Do not place fingers in front of the caliper piston(s) in an attempt to catch or protect it when applying compressed air. The piston(s) can fly out with force and could result in serious bodily injury.
    NOTE: In the following service procedure, the caliper piston may become damage when it is removed from the brake caliper assembly. If this happens, DO NOT reuse the piston. Discard and replaced with new.
  2. Install the brake caliper in a suitable holding devise.
  3. Insert a piece of wood in the brake caliper.
  4. Cover the brake caliper with a shop towel.
  5. Using compressed filtered, non-lubricated air, apply the air to the remove the pistons from the brake caliper.
    6. Fig 2: Clamping Brake Caliper
    GM800797Courtesy of GENERAL MOTORS CORP.
  6. If one of the pistons fails to be removed from the brake caliper, perform the following steps.
    1. Reposition the piston that has been removed back in the brake caliper.
    2. Using a small block of wood and a C-clamp, slowly tighten the C-clamp until the piston it is half way in the brake caliper. It does not have to be fully seated.
    3. Position a second block of wood in front of the piston that remains in the brake caliper.
    4. Cover the brake caliper with a shop towel.
    5. Using compress filtered, non lubricated air, apply the air to the remove the pistons from the brake caliper.
    7. Fig 3: Exploded View Of Brake Caliper
    GM1339829Courtesy of GENERAL MOTORS CORP.
  7. Remove the pistons (3) from the caliper bores.
  8. Remove the piston seals (2) from the caliper bores. Do not use a metal tool.
  9. Remove the bleeder valve cap (5).
  10. Remove the bleeder valve (6) from the caliper housing (1).
  11. Clean the bleeder valve, the caliper bores, the caliper passages and the pistons with denatured alcohol. Dry the parts and blow out the brake fluid passages. Use dry and filtered compressed air.
    12. Fig 4: Removing Caliper Boots
    GM1363962Courtesy of GENERAL MOTORS CORP.
  12. Remove the boots from the caliper bores. Do not scratch the caliper bores.
  13. Replace the pistons or the caliper if any of the following conditions exist:
    • Scoring in the caliper bores
    • Corrosion in the caliper bores
    • Pitting in the caliper bores
    • Damage to the pistons (phenolic)
  14. Clean the brake caliper assembly with denatured alcohol.
  15. Dry with filtered, lubricated compressed air.
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