Rear Brake Disc Inspection

Thickness and Parallelism
  1. Raise the rear of the vehicle, and support it with safety stands in the proper locations.
  1. Remove the rear wheels.
  1. Remove the brake pads: Rear disc brake type, rear drum in disc brake type.
  1. Using a micrometer, measure the brake disc or the brake disc/drum thickness at eight points, about 45 ° apart and 10 mm (0.39 in.) in from the outer edge of the brake disc or brake disc/drum. Replace the brake disc or the brake disc/drum if the smallest measurement is less than the max. refinishing limit.
    Brake disc or the brake disc/drum thickness:
    Standard:
    8.9−9.1 mm (0.35−0.36 in.)
    Max. refinishing limit:
    8.0 mm (0.31 in.)
    Brake disc or the brake disc/drum parallelism:
    0.015 mm (0.0006 in.) max.

    NOTE: This is the maximum allowable difference between the thickness measurements.
  1. If the brake disc or the brake disc/drum is beyond the service limit for parallelism, refinish the brake disc or the brake disc/drum with a commercially available on-car brake lathe.
    NOTE: If the brake disc or the brake disc/drum is beyond the service limit for refinishing, replace it.
  1. Clean the mating surfaces of the brake disc or the brake disc/drum and the inside of the wheel, then install the rear wheels.