Brake Rotor Lateral Runout Check. Pontiac Sun Runner - 2WD (Canada) 1998

For 1990-2009 cars

• | J 8001 Dial Indicator Set

• | J 26900-13 Magnetic Base

1. Raise the vehicle. Support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Remove the tire and wheel assembly. Refer to Wheel Removal in Tires and Wheels.
3. Remove the caliper. Refer to Brake Caliper Replacement in this section.
4. Invert and install all the wheel nuts to retain the rotor.
5. Fasten a J 26900-13 and a J 8001 to the strut (1) so that the indicator button contacts the brake rotor (2) about 10 mm (0.39 in) from the rotor edge.
6. Zero the J 8001 .
7. Move the rotor one complete revolution and observe the total indicated runout.

The maximum rotor lateral runout should be 0.15 mm (0.006 in). If the lateral runout exceeds specifications, clean the wheel hub and rotor mating surfaces, and measure the lateral runout again.

If the lateral runout still exceeds specifications, index the rotor on the hub one or two bolt positions from the original position.

If the lateral runout cannot be corrected by indexing the rotor, check the hub and bearing assembly for excessive play. If the hub and bearing assembly are within specifications, refer to Brake Rotor Tolerance in this section.

Refinish or replace any rotor that does not meet the lateral runout specification.