Brake Rotor Surface and Wear Inspection

This article has been updated by TSB # 05-05-23-002 dated June 10, 2005.


Brake Rotor Surface and Wear Inspection

Caution: Refer to Brake Dust Caution.

1. If the inboard friction surface of the brake rotor is not accessible, reposition and support the caliper with the brake pads.
2. Clean the friction surfaces of the brake rotor with denatured alcohol, or an equivalent approved brake cleaner.
3. 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





4. If the friction surfaces of the brake rotor exhibit one or more of the Braking Surface Conditions, the rotor requires refinishing or replacement.
5. 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.
6. Compare the groove scoring depth recorded to specifications. Refer to disc brake specifications.
Brake rotor maximum allowable scoring: 1.50 mm (0.059 inch)
7. If the brake rotor scoring depth exceeds the specification, or if an excessive amount of scoring is present, the rotor requires refinishing or replacement.


This article has been updated by TSB # 05-05-23-002 dated June 10, 2005.


A running change was made in the 2005 model year to the front brake rotors and pads. The rotor specifications are different between the first design and second design rotors. The brake rotors and pads cannot be interchanged between the first and second designs.


WARNING:
Two different designs of the front brake rotors and front brake pads are used on this vehicle. Do NOT interchange first design and second design parts, or a loss of braking and personal injury could occur.




Disc Brake Component Specifications (Cadillac DeVille)

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