Brake Rotor Surface & Wear Inspection
- If the inboard friction surface of the brake rotor is not accessible, reposition and support the caliper with the brake pads. See BRAKE PADS under REMOVAL & INSTALLATION.
- Clean the friction surfaces of the brake rotor with denatured alcohol, or an equivalent approved brake cleaner.
- Inspect the friction surfaces of the brake rotor for the following braking surface conditions:
- Heavy rust and/or pitting. Light surface rust can be removed with an abrasive disc; heavy surface rust and/or pitting must be removed by refinishing the rotor.
- Cracks and/or heat spots.
- Excessive blueing discoloration.
- If the friction surfaces of the brake rotor exhibit one or more of the braking surface conditions listed, the rotor requires refinishing or replacement. For refinishing, see BRAKE ROTOR REFINISHING . For replacement, see BRAKE ROTOR under REMOVAL & INSTALLATION.
- Using a micrometer calibrated in thousandths-of-a-millimeter, or ten-thousandths-of-an-inch, measure and record the scoring depth of any grooves present on the rotor friction surfaces. Compare the groove scoring depth recorded to specification. See DISC BRAKE SPECIFICATIONS .
- If the brake rotor scoring depth exceeds the specification, or if an excessive amount of scoring is present, the rotor requires refinishing or replacement.