Here's a general overview of the process. Specific steps and torque specifications can vary slightly depending on the exact model and year, so always consult a repair manual specific to your 1997 Pontiac Grand Prix. A Haynes or Chilton manual is a good investment.
Tools You'll Likely Need:
* Jack and jack stands: Essential for safely lifting the car.
* Wheel chocks: To prevent the car from rolling.
* Lug wrench: To remove the wheel.
* Torque wrench: Crucial for tightening bolts to the correct specification.
* Socket set: Various sizes, including metric.
* Hammer and punch (or drift): For removing and installing components.
* Pry bar: May be needed to separate parts.
* Brake caliper compression tool: To compress the caliper piston.
* Wheel bearing press (highly recommended): Makes the job significantly easier and reduces the risk of damage. A cheap harbor freight one is better than nothing. You can *try* to use a socket and hammer, but it's risky.
* Penetrating oil (PB Blaster, etc.): To loosen rusted or seized bolts.
* New wheel bearing hub assembly: Make sure you get the correct part for your vehicle.
* Clean rags: To keep things clean.
* Safety glasses: Protect your eyes.
* Gloves: Protect your hands.
General Steps (Consult your repair manual for precise details):
1. Safety First: Park on a level surface, engage the parking brake, and use wheel chocks. Lift the car securely using a jack and support it with jack stands.
2. Remove the Wheel: Remove the lug nuts and take off the wheel.
3. Remove the Brake Caliper: Use the caliper compression tool to compress the brake caliper piston. Then, remove the caliper bolts and carefully hang the caliper out of the way using a wire or bungee cord. Be careful not to damage the brake line.
4. Remove the Rotor: Remove the rotor retaining bolts (if any) and carefully remove the rotor.
5. Disconnect the ABS Sensor (if applicable): Carefully disconnect the ABS sensor wire from the hub assembly.
6. Remove the Cotter Pin and Castle Nut: Remove the cotter pin and then carefully loosen and remove the large castle nut holding the hub assembly in place. Use penetrating oil if needed.
7. Remove the Hub Assembly: This is often the most challenging part. The hub assembly might be pressed onto the spindle. Using a wheel bearing press is highly recommended to remove it without damaging the spindle. If you don't have a press, you can try using a large socket and hammer, but this is risky and may damage the spindle.
8. Install the New Hub Assembly: Using the wheel bearing press (or carefully with a socket and hammer if you must), press the new hub assembly onto the spindle.
9. Reassemble Everything: Follow the disassembly steps in reverse order, ensuring everything is properly tightened to the manufacturer's specified torque settings. Make sure the cotter pin is reinstalled correctly.
10. Torque Specifications: Crucially, check your repair manual for the proper torque specifications for all bolts and nuts. Incorrect tightening can lead to premature failure.
11. Test Drive: After reassembly, test drive the vehicle to ensure the new bearing is working correctly and there are no noises or vibrations.
Important Considerations:
* ABS Sensor: Be extremely careful with the ABS sensor; damage to it can cause problems with your anti-lock braking system.
* Torque Specifications: Use a torque wrench and follow the manufacturer's recommendations precisely.
* Wheel Bearing Press: Using a press is highly recommended to avoid damaging parts.
* Repair Manual: Consult a repair manual specific to your vehicle for detailed instructions and torque specifications.
This is a complex repair. If you're not comfortable performing this task, take your vehicle to a qualified mechanic. Improper repair can lead to serious safety issues.
