Brake Rotor Assembled Lateral Runout (LRO) Measurement

1. Remove road wheel and install two wheel nuts to retain rotor.





2. Fasten a dial indicator to the steering knuckle so that the indictor stylus contacts the rotor about 10 mm (0.40 in.) from the rotor edge.
3. Zero the dial indicator.
4. Move the rotor one complete revolution and observe total indicated runout (TIR).

Maximum Lateral Runout: 0.060 mm (0.0024 in.)

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 0.040 mm (0.0016 in.), replace the hub and bearing assembly. If lateral hub and bearing runout is within specifications, refinish or replace the rotor as necessary. Refer to Wheel Hubs and Wheel Bearings in Transmission and Drive Train.