Component Tests and General Diagnostics

NOTE: Whenever brake rotor has been separated from hub face, clean any rust or foreign material from mating surface on hub face and front disc brake rotor. Failure to do this may result in increased lateral runout of the front disc brake rotor and brake pulsation.

Install front disc brake rotors on wheel hubs and hold in place by using inverted wheel hub bolt nuts and washers to seat front disc brake rotors to hubs. Tighten wheel hub bolt nuts to 113-153 Nm (84-112 ft lb).





Using a dial indicator, measure front disc brake rotor lateral runout as shown. The dial indicator should be centered on braking surface. Rotate front disc brake rotor while measuring runout. If runout is greater than 0.08 mm (0.003 inch), front disc brake rotor must be repositioned (indexed) on wheel hub to obtain the lowest possible runout.





If lateral runout of front disc brake rotor is above 0.08 mm (0.003 inch) after repositioning (indexing), the wheel hub and front wheel bearing assembly must be inspected. Using a dial indicator, measure wheel hub and front wheel bearing assembly face runout as shown. Wheel hub runout must be less than 0.06 mm (0.002 inch). If wheel hub face runout is greater than 0.06 mm (0.002 inch), a new wheel hub must be installed.

NOTE: If front disc brake rotor lateral runout remains greater than 0.08 mm (0.003 inch) after the following service procedures, this indicates that the brake lathe requires service:

^ Front disc brake rotor machining
^ Front disc brake rotor repositioning (indexing)
^ Verifying wheel hub face runout is less than 0.06 mm (0.002 inch).

NOTE: Rotunda On-The-Car Lathe Package 104-00130 or equivalent should be used to refinish front disc brake rotors.