LaCrosse FWD V6-3.0L (2010)
Brake Rotor/Disc: Testing and Inspection
Brake Rotor Thickness Measurement
Brake Rotor Thickness Measurement
Warning: Refer to Brake Dust Warning (See: Service Precautions/Technician Safety Information/Brake Dust Warning).
1. If the inboard friction surface of the brake rotor is not accessible, reposition and support the caliper with the brake pads. Refer to Front Disc Brake
Pads Replacement (See: Brake Pad/Service and Repair/Removal and Replacement/Front Disc Brake Pads Replacement) and/or Rear Disc Brake
Pads Replacement (See: Brake Pad/Service and Repair/Removal and Replacement/Rear Disc Brake Pads Replacement).
2. Clean the friction surfaces of the brake rotor with denatured alcohol, or an equivalent approved brake cleaner.
3. Using a micrometer calibrated in thousandths-of-a-millimeter, or ten-thousandths-of-an-inch, measure and record the lowest thickness of the brake
rotor at 4 or more points, equally spaced around the rotor.
Ensure that the measurements are only taken within the friction surfaces and that the micrometer is positioned the same distance from the outside
edge of the rotor, about 13 mm (1/2 in), for each measurement.
4. Compare the lowest thickness measurement recorded to the brake rotor discard thickness specifications. Refer to Disc Brake Component
Specifications (See: Specifications/Mechanical Specifications/Disc Brake Component Specifications).
5. If the lowest thickness measurement of the brake rotor is above the discard thickness specification, the brake rotor may be refinished, depending
upon surface and wear conditions which may be present.
6. If the lowest thickness measurement of the brake rotor is at or below the discard thickness specification, the rotor requires replacement. Refer to
Front Brake Rotor Replacement (See: Service and Repair/Removal and Replacement/Front Brake Rotor Replacement) and/or Rear Brake Rotor
Replacement (See: Service and Repair/Removal and Replacement/Rear Brake Rotor Replacement).