Brake Rotor Assembled Lateral Runout (LRO) Measurement

1. Remove wheel and install a wheel bolt and spacer across from rotor retaining screw.
2. Fasten a dial indicator to steering knuckle so that the indictor plunger contacts the rotor about 10 mm (0.40 inch) from the rotor edge.
3. Zero the dial indicator.
4. Rotate rotor one complete revolution and observe total indicated runout (TIR).
Maximum Lateral Runout: 0.030 mm (0.001 inch)
Lateral runout of the rotor, if excessive, can often be improved by cleaning dirt and rust from hub and rotor mating surfaces and/or indexing 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 lateral runout. If the hub and bearing assembly lateral runout exceeds, 0.065 mm (0.002 inch) front and 0.040 mm (0.0016 inch) rear, replace the hub and bearing assembly. If lateral hub and bearing runout is within specifications, refinish or replace the rotor as necessary.