Tools You'll Likely Need:
* Jack and jack stands: Essential for safety. Never work under a car supported only by a jack.
* Lug wrench: To remove the wheels.
* Wheel chocks: To secure the vehicle.
* Socket set and wrenches: Various sizes will be needed.
* Hammer and punch: For removing components.
* Bearing puller: Specifically designed for wheel bearings. A slide hammer puller is highly recommended.
* Torque wrench: Crucial for tightening components to the correct specifications.
* Penetrating oil (PB Blaster or similar): To loosen rusted or seized bolts.
* New rear wheel hub assembly: This usually replaces the bearing and other related parts. Buying a pre-assembled unit is generally recommended.
* Clean rags and gloves: To keep things clean and protect your hands.
* Safety glasses: To protect your eyes.
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 on the wheels that are not being worked on. Jack up the vehicle and securely support it on jack stands.
2. Remove the Wheel: Remove the lug nuts and wheel.
3. Remove the Brake Caliper and Rotor: Depending on the brake design, you may need to remove the caliper (support it with wire to prevent strain on the brake line) and then the rotor. The rotor may be bolted or pressed onto the hub.
4. Disconnect the Speed Sensor (if applicable): This sensor is often located near the hub and will need to be unplugged.
5. Remove the Axle Nut: This is often a very large nut; you'll need a significant amount of leverage to break it loose. Use penetrating oil beforehand.
6. Remove the Hub Assembly: This is the most challenging part. The hub assembly is usually pressed onto the axle. You will likely need a bearing puller or other specialized tools to remove it. This is where a repair manual's diagrams are invaluable. Be careful not to damage the axle.
7. Install the New Hub Assembly: Press the new hub assembly onto the axle. This often requires a press or other specialized tool to ensure correct seating and prevent damage.
8. Reassembly: Reassemble everything in the reverse order of removal, paying close attention to torque specifications for all fasteners. This includes the axle nut, rotor, caliper, and wheel.
9. Test Drive: After reassembly, test drive the vehicle to ensure proper function and check for any noises or vibrations.
Important Considerations:
* Pressing Tools: Properly pressing the new hub assembly onto the axle is critical. A shop press is ideal, but some specialized puller tools can also be used carefully.
* Torque Specifications: Using the correct torque specifications is paramount to avoid damaging the components.
* ABS Sensor: If your Cavalier has anti-lock brakes (ABS), be extremely careful with the ABS sensor, and ensure it's correctly reinstalled.
* Hub Assembly vs. Individual Bearings: Replacing the entire hub assembly is generally recommended as it's often easier and less prone to error than replacing individual bearings. Individual bearings might require special tools and expertise for accurate installation.
This is a complex task. If you're not comfortable with auto repair, it is strongly advised to take your vehicle to a qualified mechanic. Improperly installed wheel bearings can lead to catastrophic failure and serious injury. Always prioritize safety.
