Brake Rotor/Disc: Testing and Inspection

Special Tools:

Brake Disc Runout Check
1. Loosen the wheel nuts.
2. Raise and support the vehicle.
3. Remove the wheel.
4. Remove the brake caliper.
5. Reverse and install the wheel nuts to hold the disc in place.





6. Install a dial indicator gauge and holding fixture to the suspension strut.

7. NOTE: If the runout is outside specification, check the wheel hub face runout.

Measure the inner and outer faces of the brake disc.
- Position the gauge so that it contacts the brake disc 10 mm (0.4 inches) from the outer edge.
- Slowly rotate the disc. The total dial reading should not exceed 0.15 mm 0.006 inch).
8. Remove the brake disc.





9. Check the hub face runout.
- Slowly rotate the hub and check the runout. If the runout exceeds 0.05 mm (0.002 inch) install a new hub and check.
10. If the wheel hub face runout is within specification install a new disc and check disc runout.





11. To install, reverse the removal procedure.