Here's a general outline of the process. This is NOT a substitute for a proper repair manual. Variations exist depending on the specific Cougar model and whether you have disc or drum brakes.
Tools You'll Likely Need:
* Jack and jack stands: Essential for safety. Never work under a vehicle supported only by a jack.
* Wheel chocks: To prevent the car from rolling.
* Lug wrench: To remove the wheels.
* Socket set and wrenches: Various sizes will be needed.
* Torque wrench: Crucial for proper tightening to prevent damage.
* Hammer and punch: Possibly needed for removing components.
* Ball joint separator (pickle fork): Might be needed, use carefully to avoid damage.
* C-clamp or bearing race installer/remover: To press the bearings in and out. This is often the most specialized tool needed.
* Penetrating oil (like PB Blaster): To loosen rusted or seized parts.
* Grease: For repacking the new bearing.
* New rear wheel bearings: Make sure you get the correct ones for your Cougar.
General Steps (Again, consult a repair manual for specifics):
1. Safety First: Park on a level surface, engage the parking brake, and use wheel chocks. Raise the vehicle safely using the jack and secure it on jack stands.
2. Remove the Wheel: Remove the lug nuts and take off the wheel.
3. Remove the Brake Caliper and Rotor (if applicable): For disc brakes, you'll likely need to remove the caliper (often using a caliper bracket bolt) and possibly the rotor. Support the caliper with wire to prevent it from hanging on the brake line. For drum brakes, you'll need to remove the drum.
4. Disconnect other components: This might involve removing the brake backing plate, cotter pins, axle nut, and possibly other suspension components (like the control arm). The exact steps vary greatly.
5. Remove the Axle: This often involves removing the axle nut and then carefully separating the axle from the hub assembly.
6. Remove the Old Bearing: This is where the bearing race remover comes in. This is usually the most difficult part of the job, and improper technique can damage the hub or axle.
7. Install the New Bearing: Use the bearing race installer to press the new bearing into the hub. Ensure it's seated correctly.
8. Reassemble: Reassemble everything in reverse order, paying close attention to torque specifications from your repair manual. This includes lubricating the new bearing and properly tightening all components.
9. Lower the Vehicle and Test: Lower the vehicle carefully and check for proper wheel rotation and no unusual noises. Test drive carefully to ensure everything is working correctly.
Important Considerations:
* Wheel Bearings are Precision Parts: They must be installed correctly. Improper installation can lead to premature failure and potentially dangerous situations.
* Torque Specifications are Critical: Using the wrong torque can damage components. Always consult your repair manual.
* Hub and Axle Condition: Inspect the hub and axle for damage while the bearings are out. If damaged, they'll need replacing as well.
This is a simplified overview. Do not attempt this repair without a detailed repair manual specific to your 1999 Mercury Cougar. If you lack experience with this type of repair, it's best to take your car to a qualified mechanic. The risk of damaging components or causing an unsafe condition is significant.
