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Home >> Chevrolet >> 2017 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 72 (Disc Brake System) >> Repair Instructions >> Front Brake Caliper Overhaul >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
    WARNING:

    Refer to Brake Dust Warning .

    WARNING:

    Refer to Brake Fluid Irritant Warning .

    WARNING:

    Use of eye goggles is necessary to prevent personal injury.

  1. Remove the front brake caliper. Refer to Front Brake Caliper Replacement .
  2. GM2888758
    WARNING:

    Refer to Caliper Piston Removing Warning .

    CAUTION:

    Use clean cloths to pad interior of caliper housing during piston removal. Use just enough air to ease the pistons out of the bores. If the pistons are blown out, even with the padding provided, it may be damaged.

    Remove the brake caliper piston from the caliper bore by directing low pressure compressed air into the caliper (1) through the fluid inlet hole.

  3. GM2888760

    Remove and DISCARD the piston dust boot (1) from the brake caliper piston (2).

  4. GM2888759

    Remove and DISCARD the piston seal (1) from the brake caliper housing using a small flat bladed plastic tool.

  5. Remove and DISCARD the brake bleeder valve and the brake bleeder valve cap from the brake caliper.
  6. NOTE:

    Do not use abrasives to clean the brake caliper piston.

  7. Check the front brake caliper condition:
    • If cracks, scoring, pitting, excessive rust, and/or excessive corrosion are present in the caliper bore, replace the caliper assembly.
    • If light rust or light corrosion are present in the caliper bore, attempt to remove the imperfection with a fine emery paper. If the imperfection cannot be removed, replace the caliper assembly.
    • Clean the brake caliper piston bore and seal counterbore, and the caliper piston with denatured alcohol, or equivalent.
    • Dry the caliper piston bore and counterbore, and the piston with non-lubricated, filtered, compressed air.
    • Inspect the caliper piston for cracks, scoring, and/or damage to the plating. Replace the caliper piston if any of these conditions exist.
    • Inspect the caliper mounting holes for cracks, scoring, pitting, rust and/or excessive corrosion. Replace the caliper assembly if any of these conditions exist.