Here's a general overview of the process. This is NOT a complete guide and should not be used as a substitute for a professional repair manual specific to your 1999 Alero. Always consult a repair manual for detailed instructions, torque specifications, and diagrams specific to your vehicle's year and model.
Tools you'll likely need:
* Wheel chocks: Essential for safety.
* Jack and jack stands: Never work under a car supported only by a jack.
* Lug wrench: To remove the wheel.
* Socket set and wrenches: Various sizes will be needed.
* Ball joint separator: To separate the ball joint from the steering knuckle.
* Tie rod separator: To separate the tie rod end from the steering knuckle.
* Brake caliper removal tool (C-clamp or similar): To compress the caliper piston.
* Hub nut socket (usually large): Often a special socket.
* Bearing press: Crucial for removing and installing the bearing. This is typically the most expensive and specialized tool needed. Trying to do this without one will likely damage the hub assembly.
* Penetrating oil (PB Blaster or similar): To help loosen rusted or seized components.
* New wheel bearing: Make sure you get the correct part number for your Alero.
* Torque wrench: Absolutely necessary for tightening bolts to the correct specification.
* Shop rag or clean cloths: To keep things clean.
General Steps (Consult your repair manual for specifics):
1. Safety First: Chock the rear wheels, engage the parking brake, and raise the front of the car using the jack and secure it with jack stands.
2. Remove the Wheel: Remove the lug nuts and take off the wheel.
3. Remove the Brake Caliper: Remove the caliper bolts and carefully hang the caliper out of the way using a wire or bungee cord. Compress the caliper piston to make room for the rotor.
4. Disconnect the Ball Joint and Tie Rod: Use the appropriate separators to carefully separate the ball joint and tie rod end from the steering knuckle. This step can be tricky and requires careful technique.
5. Remove the Rotor: Remove the rotor.
6. Remove the Hub Nut: This nut is usually very large and tight. Use the correct socket and plenty of leverage (breaker bar may be necessary).
7. Remove the Axle Nut: This might be on the other side of the hub depending on the model.
8. Remove the Hub Assembly: Carefully remove the hub assembly from the spindle. This might involve some gentle persuasion.
9. Press Out the Old Bearing: This requires a bearing press. Improper removal can damage the hub assembly.
10. Press In the New Bearing: Again, a bearing press is essential for this step. Ensure the new bearing is properly seated.
11. Reassemble: Reassemble everything in reverse order, paying close attention to torque specifications.
12. Lower the Car: Carefully lower the car and remove the jack stands.
13. Test Drive: Test drive the vehicle to verify the repair.
Again, this is a simplified overview. The actual procedure is more complex and requires specialized tools and knowledge. Refer to a repair manual specific to your 1999 Oldsmobile Alero before attempting this repair. If you are not comfortable performing this repair yourself, it's strongly recommended to take your vehicle to a qualified mechanic. A poorly performed wheel bearing replacement can lead to serious safety issues.
