- Clean the brake pad lining
contact surface of the brake rotor with denatured alcohol or an equivalent
brake cleaner.
- Using a micrometer calibrated in ten-thousands of an inch, measure
and record the lowest thickness of the brake rotor at four or more points,
equally spaced around the rotor.
Ensure that the measurements are only taken within the brake pad lining
contact area and that the micrometer is positioned the same distance from
the outside edge of the rotor for each measurement.
- Compare the lowest thickness measurement recorded to the following
specifications:
Specification
| • | JM3 Front Brake rotor minimum allowable thickness after refinishing
24.89 mm (0.980 in). |
| • | JM3 Front Brake rotor discard thickness 24.51 mm (0.965 in). |
| • | JC1 Front Brake rotor minimum allowable thickness after refinishing
28.8 mm (1.13 in). |
| • | JC1 Front Brake rotor discard thickness 27.5 mm (1.08 in). |
| • | JC1 Rear Brake rotor minimum allowable thickness after refinishing
19.64 mm (0.735 in). |
| • | JC1 Rear Brake rotor discard thickness 18.50 mm (0.728 in). |
- If the lowest thickness measurement of the brake rotor is above
the minimum allowable thickness after refinishing specification; the rotor
may be able to be refinished, depending upon surface and wear conditions
which may be present.
- If the lowest thickness measurement of the brake rotor is at or
below the minimum allowable thickness after refinishing specification; the
rotor may not be refinished.
- If the lowest thickness measurement of the brake rotor is at or
below the discard thickness specification; the rotor requires replacement.
