Installation Procedure
- Use the J 42450-A to clean all rust and contaminants from the mating surface of the hub flange.
- Use the J 41013 to clean all rust and contaminants from the inside diameter of the hat section of the brake rotor to prevent any foreign material from getting between the brake rotor and the hub flange.
- Align the rotor to its original position on the hub (if applicable) and install the rotor.
- Install the caliper and caliper bracket assembly.
- Perform the following procedure before installing the brake caliper bracket mounting bolts.
- Remove all traces of the original adhesive patch.
- Clean the threads of the bolt with brake parts cleaner or the equivalent and allow to dry.
- Apply Threadlocker GM P/N 12345493 or RED LOCTITE™ #272 to the threads of the bolt.
- Refer to FASTENER NOTICE
in Cautions and Notices.
Install the caliper bracket mounting bolts.
Tighten
- Tighten the brake caliper bracket mounting bolts to 175 N.m (121 lb ft) (15 Series).
- Tighten the brake caliper bracket mounting bolts to 300 N.m (221 lb ft) (25 and 35 Series).
- Install the front wheel hub extension (dual wheel vehicles only).
- Insert a drift or large screwdriver through the brake caliper into one of the brake rotor vanes in order to prevent the rotor from turning.
- Align and install the front wheel hub extension to the original position on the hub.
- Install the front wheel hub extension nuts.
Tighten
Tighten the front wheel hub extension nuts to 130 N.m (96 lb ft).
IMPORTANT:Follow the same tightening sequence for the front wheel hub extension that is used on an eight lug wheel. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
- Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
- Lower the vehicle.
- With the engine OFF, gradually apply the brake pedal to approximately 2/3 of it's travel distance.
- Slowly release the brake pedal.
- Wait 15 seconds, then repeat steps 10-11 until a firm pedal is obtained. This will properly seat the brake caliper pistons and brake pads.
- Fill the master cylinder reservoir to the proper level with clean brake fluid. Refer to Master Cylinder Reservoir Filling in Hydraulic Brakes.
Whenever the brake rotor has been separated from the wheel bearing flange, clean any rust or foreign material from the mating surface of the rotor and flange with the J 42450 hub cleaning kit. Failure to do this may result in increased lateral runout of the rotor and brake pulsation.
If the rotor was removed using the jack screw method you must ensure that the hub flange is free of nicks or marks caused by this procedure. Remove all raised nicks or marks before installing the rotor.