Here's a general outline of the process. Specific steps and torque specifications will vary depending on your Grand Prix's exact model and options. Always consult a repair manual specific to your vehicle year, make, and model. A Haynes or Chilton manual is a good investment.
Tools You'll Likely Need:
* Jack and jack stands: Essential for safety. Never work under a car supported only by a jack.
* Wheel chocks: To secure the rear wheels.
* Lug wrench: To remove the wheel.
* Torque wrench: Crucial for tightening bolts to the correct specifications.
* Sockets and ratchets: Various sizes will be needed.
* Hammer and punch: Possibly for removing stubborn components.
* Ball joint separator: To separate the ball joint from the control arm.
* Tie rod end separator: To separate the tie rod end from the steering knuckle.
* Wheel bearing press/puller: Specialized tool to press the old bearing out and the new one in. This is often the most challenging part of the job. Improvising can damage the new bearing or other components.
* Penetrating oil (like PB Blaster): To help loosen rusted or seized parts.
* Grease: For the new bearing.
* New wheel bearings (and seals, if necessary): Make sure you get the correct parts for your vehicle.
General Steps (Consult your repair manual for precise instructions):
1. Safety First: Engage the parking brake, chock the rear wheels, and jack up the front of the car securely on jack stands.
2. Remove the Wheel: Remove the lug nuts and wheel.
3. Disconnect Brake Caliper: Carefully remove the brake caliper and hang it out of the way using a wire or bungee cord. Do not let the brake line hang freely.
4. Disconnect the ABS Sensor (if applicable): If your Grand Prix has ABS, carefully disconnect the ABS sensor wire from the hub.
5. Disconnect the Tie Rod End: Use a tie rod end separator to separate the tie rod end from the steering knuckle. Mark the position before disconnecting to help with re-alignment.
6. Disconnect the Ball Joint: Use a ball joint separator to separate the ball joint from the control arm.
7. Remove the Steering Knuckle: Once the tie rod and ball joint are disconnected, remove the steering knuckle from the hub assembly.
8. Remove the Old Wheel Bearing: This is where the bearing press/puller is essential. Attempting to remove the bearing without the proper tool can severely damage it and surrounding components.
9. Install the New Wheel Bearing: Use the bearing press/puller to install the new wheel bearing. Ensure it's seated correctly.
10. Reassemble Everything: Carefully reassemble all components in the reverse order of disassembly, paying close attention to torque specifications from your repair manual.
11. Reinstall the Wheel: Reinstall the wheel and tighten the lug nuts to the proper torque specification.
12. Lower the Vehicle: Carefully lower the vehicle to the ground.
13. Torque Check and Test Drive: After driving a short distance, check the lug nuts again for tightness.
Important Considerations:
* Rust and seized components: On older cars, rusted parts can make this job significantly more difficult. Penetrating oil applied liberally and allowed to soak is your friend.
* Alignment: After replacing a wheel bearing, it's highly recommended to have a wheel alignment performed to ensure proper handling and tire wear.
* Hub seals: These might need replacing while you're at it. Check the condition before starting and replace as needed.
This is a simplified overview. You absolutely must consult a repair manual specific to your 1999 Pontiac Grand Prix before attempting this repair. Improper installation can lead to serious safety issues. If you are unsure about any step, seek professional help.
