Brake Rotor Surface & Wear Inspection
WARNING: This page is about a different car, the 2003 Pontiac Montana, 2003 Oldsmobile Silhouette, and 2003 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.
- Clean the brake pad lining contact surfaces of the brake rotor with denatured alcohol or an equivalent approved brake cleaner. Inspect the braking 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 braking surfaces of the brake rotor exhibits one or more of the braking surface conditions, replace the brake rotor.
- Using a micrometer calibrated in thousanths-of-a-millimeter, or ten-thousanths-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 the following 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.