Rear Brake Rotor Replacement (J56)
Rear Brake Rotor Replacement (J56)
Special Tools
* J-2619-A - Slide Hammer w/Adapter
* J-41013 - Rotor Resurfacing Kit
* J-42450-A - Wheel Hub Resurfacing Kit
* J-46277 - Rotor Removal Tool
Removal Procedure
Warning: Refer to Brake Dust Warning (Brake Dust Warning).
1. Turn the ignition to the OFF position.
2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle (Service and Repair).
3. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation (Service and Repair).
4. Remove the lower brake caliper bolt (1).
5. Remove the upper brake caliper bolt (2).
Caution: Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is separated from its mount and the hydraulic flexible brake hose is still connected. Failure to support the caliper in this manner will cause the flexible brake hose to bear the weight of the caliper, which may cause damage to the brake hose and in turn may cause a brake fluid leak.
6. Remove the brake caliper and support with heavy mechanics wire or equivalent.
7. Remove the brake rotor screw (1).
8. Remove the brake rotor (2).
9. If the brake rotor cannot be removed, perform the following:
1. Assemble the J-2619-A - Slide Hammer w/Adapter to the J-46277 - Rotor Removal Tool.
2. Insert the J-46277 - Rotor Removal Tool between the rotor friction surfaces in the vent section of the brake rotor.
Do not place the J-46277 - Rotor Removal Tool on the friction surface of the brake rotor.
3. Using the J-2619-A - Slide Hammer w/Adapter and the J-46277 - Rotor Removal Tool , remove the brake rotor from the wheel hub assembly.
10. Inspect the park brake components for the following conditions:
* Bent or broken hold down springs
* Broken, cracked, or worn park brake shoe lining
* Bent or damaged park brake shoe
* Worn, bent, or damaged parking brake backing plate
11. If any of the above listed conditions are found, repair or replace the damaged park brake components.
Installation Procedure
Note: Whenever the brake rotor has been separated from the hub/axle flange, any rust or contaminants should be cleaned from the hub/axle flange and the brake rotor mating surfaces. Failure to do this may result in excessive assembled lateral runout (LRO) of the brake rotor, which could lead to brake pulsation.
1. Using the J-42450-A - Wheel Hub Resurfacing Kit , thoroughly clean any rust or corrosion from the mating surface of the hub/axle flange.
2. Using the J-41013 - Rotor Resurfacing Kit , thoroughly clean any rust or corrosion from the mating surface and mounting surface of the brake rotor.
3. Install the brake rotor screw (1) and the brake rotor (2).
Caution: Refer to Fastener Caution (Fastener Caution).
4. Tighten the brake rotor screw to 14 Nm (124 lb in).
Note: If reusing the brake caliper to knuckle mounting bolts the threads of the bolts and the threads of the knuckle mounting holes must be free of residue and debris prior to application of threadlocker in order to ensure proper adhesion and fastener retention.
5. Prepare the bolts and the threaded holes for assembly:
* Thoroughly clean the residue from the bolt threads by using denatured alcohol or equivalent and allow to dry.
* Thoroughly clean the residue from the threaded holes by using denatured alcohol or equivalent and allow to dry.
6. Apply threadlocker GM P/N 12345493 (Canadian P/N 10953488), or equivalent to 2/3 of the threaded length of the caliper to knuckle mounting bolts. Ensure that there are no gaps in the threadlocker along the length of the filled area of the bolts.
7. Allow the threadlocker to cure approximately 10 minutes before installation.
8. Position the brake caliper to the suspension knuckle.
9. Hand install the lower brake caliper bolt (1) and the upper brake caliper bolt (2).
10. Tighten the brake caliper bolts to 120 Nm (88 lb ft).
11. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation (Service and Repair).
12. If the brake rotor was refinished or replaced, or if new brake pads were installed, burnish the brake pads and rotors. Refer to Brake Pad and Rotor Burnishing (Procedures).