This process is generally similar across many vehicles, but specifics may vary depending on the year of your Sunfire. Always consult a repair manual specific to your vehicle's year and model. This is crucial for accurate torque specifications and procedure details. A Haynes or Chilton manual is a good investment.
Here's a general overview of the steps involved. Remember, this is a simplified explanation and may not cover every detail:
1. Preparation:
* Safety First: Use jack stands, never rely solely on a jack. Disconnect the negative battery terminal. Wear safety glasses.
* Gather Tools: You'll need jack and jack stands, wheel chocks, lug wrench, socket set (metric), torque wrench, hammer, punch, pry bar, penetrating oil (like PB Blaster), a bearing press (or alternative methods – see below), new wheel bearings (get the correct ones for your year and model!), and possibly a brake caliper compressor.
* Raise and Secure: Safely raise the rear of the vehicle and secure it with jack stands. Chock the front wheels.
* Remove Wheel: Remove the wheel and tire.
2. Brake Component Removal (Potentially):
* Depending on your Sunfire's design, you may need to remove the brake caliper and rotor. This often involves using a caliper compressor to retract the piston. This step is crucial and varies significantly between models and years. Your repair manual will be essential here.
3. Hub Removal:
* Often, the hub assembly is attached with several bolts. These can be stubborn; use penetrating oil and allow it to soak in before attempting to remove them. You might need to use a hammer and punch to help break them loose.
* Once the bolts are removed, the hub assembly should come off. Again, this step can be challenging and might require some force and careful maneuvering.
4. Bearing Removal:
* This is where a bearing press is ideal. It allows you to safely remove the old bearing without damaging the hub or the new bearing.
* If you don't have a bearing press: Some people use a socket and hammer, carefully driving the old bearing out. This is riskier and requires careful work to avoid damaging the hub. A puller might also be an option. Again, consult your repair manual for the safest and most appropriate method.
5. Installation:
* Clean Everything: Thoroughly clean the hub assembly before installing the new bearing.
* Bearing Installation: Using your bearing press (or chosen method), carefully press the new bearing onto the hub. Ensure it's seated correctly.
* Reassembly: Reassemble everything in reverse order of removal. Torque all bolts to the specifications in your repair manual. This is critically important to prevent premature bearing failure. Pay close attention to the proper sequence of reassembly.
6. Final Checks:
* Lower the vehicle.
* Check for proper wheel rotation and clearance.
* Re-torque the lug nuts after driving a short distance.
Important Considerations:
* Year and Model: The specific steps can vary considerably depending on the year of your Sunfire.
* Repair Manual: This is essential. Don't attempt this without one.
* Tools: Having the right tools makes the job much easier and safer.
* Bearing Type: Ensure you get the correct type and size of wheel bearing for your Sunfire.
This is a complex procedure. If you're unsure about any step, or if you lack the necessary tools or experience, take your Sunfire to a qualified mechanic. Improperly installed bearings can lead to serious damage and safety hazards.
