Brake Rotor Surface And Wear Inspection
WARNING:
Refer to Brake Dust Warning .
- If the inboard friction surface of the brake rotor is not accessible, reposition and support the caliper with the brake pads. Front Disc Brake Pads Replacement , and/or Rear Disc Brake Pads Replacement
- 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 any of the following:
- 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 bluing discoloration
- Heavy rust and/or pitting
- If the friction surfaces of the brake rotor exhibit one or more of the above conditions, the rotor requires refinishing or replacement.
Using a micrometer (1) 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 the following specification:
Specification
Brake rotor maximum allowable scoring: 1.5 mm (0.059 in)
- If the brake rotor scoring depth exceeds the specification, or if an excessive amount of scoring is present, the rotor requires refinishing or replacement.