A) Secure the brake disc by installing washers (A) and tightening the nuts (IN) wheel fasteners.
b) Install a dial gauge.
V) While rotating the brake disc, measure the disc axial runout at the outer edge of the disc contact surface with the brake pads.
- Maximum axial runout - 0.1 mm
If disc runout is out of specification, check bearing preload; hubs and bearings. Adjust the preload if necessary.
2. Check the thickness and uniformity of brake disc wear.
A) Clean the surface of the brake disc in contact with the brake pads.
b) Using a micrometer, measure the thickness of the brake disc at a distance of approximately 10 mm from the edge of the disc every 45°.
- Nominal thickness - 9 mm
- The minimum allowable thickness is 8 mm
V) Subtract the minimum value from the maximum measured value.
- Maximum measurement difference - 0.015 mm
If the brake disc is worn unevenly (measurement difference exceeds the maximum allowable value), grind or replace the brake disc.
If the thickness of the brake disc is less than the minimum, replace the brake disc.
3. Check the thickness of the brake pads.
A) Jack up the rear of the car and place it on stands.
b) Remove wheels.
V) Check the thickness of the inner and outer brake pads.
- Standard thickness - 7.5 mm
- Minimum thickness - 1.6 mm
G) Replace brake pads as a set (right and left side at the same time), if at least one of the linings of the block has a minimum or smaller thickness.