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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 509 (Disc Brakes & Drum Brakes) >> Adjustments & Inspections >> Disc Brakes >> Brake Rotor Surface & Wear Inspection

Brake Rotor Surface & Wear Inspection

WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
  1. Reposition and support the caliper and the brake pads.
  2. Clean the friction surfaces of the brake rotor with denatured alcohol, or an equivalent approved brake cleaner.
  3. Inspect the braking surfaces of the brake rotor for the following braking surface conditions:
    • Heavy rust and/or pitting Use an abrasive disc in order to remove light surface rust. Refinish the rotor in order to remove heavy surface rust and/or pitting.
    • Cracks and/or heat spots.
    • Excessive blueing discoloration.

    If the braking surfaces of the brake rotor exhibits one or more of the conditions, refinish or replace the brake rotor.

  4. Use a micrometer to measure any grooves on the rotor braking surface. Compare the groove depth to the specifications. See DISC BRAKE SPECIFICATIONS  .
  5. If the groove depth exceeds the specification, or if an excessive amount of scoring is present, refinish or replace the brake rotor.