How to Replace Rear Disc Brakes in a Pontiac Grand Prixby ContributorUpdated November 07, 2017
Items you will need
Syringe or suction gun
4 Jack stands
2 Inboard brake pads
2 Outboard brake pads
How to Replace Rear Disc Brakes in a Pontiac Grand Prix. The Pontiac Grand Prix has either disc or drum brakes in the rear of the car. Many drivers prefer disc brakes because they have efficient stopping power and are easy to replace. Follow these steps to learn how.
Removal of the Old Disc Brakes
Drain approximately two-thirds of the brake fluid from the master cylinder reservoir. Use a syringe or suction gun to siphon the brake fluid and empty it into an approved sealed container. Dispose of it according to your county regulations.
Lift the rear of the Pontiac Grand Prix off the ground with a car jack. Use jack stands to support the vehicle on all sides. Keep children and animals out of the area when you replace the brakes to prevent accidental injury.
Loosen the lug nuts with a torque wrench and remove the wheel and tire assemblies. Set them aside face up to prevent damage. Replace two lug nuts to keep the rotor secured after removing the caliper.
Disconnect the caliper body by removing the caliper mounting bolt that connects it to the bracket. Take out the caliper retaining bolt. Rotate the caliper upwards and secure it to the Pontiac Grand Prix's frame with mechanical wire.
Take out the brake shoes and lining. Remove the brake clips from the caliper support.
Installation of the New Disc Brakes
Retreat the piston into the caliper bore by rotating it with a spanner wrench. Position the notches on the piston at the 6 and 12 o'clock positions. Press any trapped air out of the piston boot.
Replace the pad clips on the caliper support with the new ones. Grease the inner pad where is makes contact with the piston and mounting surfaces.
Install the new inboard and outboard brake pads. Engage the notches on the brake shoes with the support abutments.
Remove the caliper from the mechanical wire. Lay it over the brake pads and replace the mounting bolts. Torque it to 32 ft. lb.
Place the wheel and tire assemblies back on the hubs. Torque the lug nuts to the required specifications. Lower the Pontiac Grand Prix to the ground and pump the brakes to seat the pistons.