For 1990-2009 cars only
- Clean the brake shoe lining contact surface of the brake drum with denatured alcohol or an equivalent brake cleaner.
- Using a brake drum micrometer calibrated in thousands of an inch, measure and record the largest inside diameter of the brake drum at four or more points, equally spaced around the drum.
- Compare the largest diameter measurement recorded to the following specifications:
- If the largest diameter measurement of the brake drum is less than the maximum allowable inside diameter after refinishing specification; the drum may be refinished, depending upon surface and wear conditions.
- If the largest diameter measurement of the brake drum is equal to or greater than the maximum allowable inside diameter after refinishing specification; the drum may not be refinished.
- If the largest inside diameter measurement of the brake drum is equal to or greater than the discard inside diameter specification; the drum requires replacement.
Ensure the measurements are only taken within the brake shoe lining contact area. The micrometer much be positioned the same distance from the outside edge of the drum for each measurement.
Specification
| • | Brake drum maximum allowable inside diameter after refinishing: 230.50 mm (9.075 in) |
| • | Brake drum discard inside diameter: 231.00 mm (9.094 in) |
