Tools You'll Need:
* Repair Manual: Absolutely essential for torque specs, diagrams, and specific procedures.
* Jack and Jack Stands: Securely support the vehicle. Never work under a vehicle supported only by a jack.
* Wheel Chocks: For extra safety.
* Lug Wrench: To remove the wheel.
* Wheel Alignment Tool: (Optional, but highly recommended)
* Socket Set: Various sizes, including those for the axle nut.
* Wrench Set: Various sizes.
* Hammer and Punch: Possibly needed to break loose stubborn parts.
* Pry Bar: May be helpful for separating components.
* Penetrating Oil (like PB Blaster): Helps loosen rusted or seized parts.
* Torque Wrench: Crucial for proper tightening of bolts and nuts.
* New Front Wheel Bearing and Seal: Make sure you get the correct part for your Cougar.
* Bearing Packing Grease: High-quality grease specifically designed for wheel bearings.
* Clean Rags: To keep things clean.
General Steps (Consult your repair manual for precise steps):
1. Safety First: Park on a level surface, engage the parking brake, and use wheel chocks. Raise the vehicle using the jack and securely support it with jack stands.
2. Remove the Wheel: Unscrew the lug nuts and remove the wheel.
3. Remove the Brake Caliper: Carefully remove the caliper assembly and support it with a wire or hang it from the suspension to prevent damage to the brake line.
4. Remove the Rotor: Remove the rotor (brake disc). This may require some persuasion with a hammer and punch if it's stuck.
5. Remove the Axle Nut: This is often very tight. Use a breaker bar and penetrating oil if necessary. Important: Mark the axle nut's position relative to the hub before removing it to help with proper reinstallation.
6. Remove the Hub Assembly: This step varies depending on the Cougar's design. You may need to remove cotter pins, washers, and other components before the hub can be separated from the knuckle. Often, a large puller is necessary to remove the hub from the bearing.
7. Remove the Old Bearing: Once the hub is removed, you'll need to press out the old bearing. This usually requires a bearing press. Improper removal can damage the bearing and housing.
8. Install the New Bearing: Use a bearing press to carefully install the new bearing into the hub assembly. Ensure it is seated correctly.
9. Pack the New Bearing with Grease: Thoroughly pack the new bearing with the correct grease.
10. Reassemble: Reassemble all components in reverse order of removal, paying close attention to the sequence and proper torque specifications (from your repair manual). This includes properly installing the new seal.
11. Torque Specifications: Use your torque wrench to tighten all nuts and bolts to the manufacturer's specified torque. This is crucial for proper bearing function and safety.
12. Lower the Vehicle: Carefully lower the vehicle.
13. Wheel Alignment: After reassembly, it's highly recommended to have a wheel alignment performed to ensure proper handling and tire wear.
Important Considerations:
* Pressing the Bearings: This step often requires specialized tools. If you're not comfortable with this, take it to a professional mechanic. Damaging the bearing housing can severely compromise the repair.
* Hub Removal: The hub may be pressed onto the bearing, requiring a substantial press.
* Torque Specs: Incorrect torque can ruin the new bearing and lead to safety hazards.
* Parts: Ensure you purchase the correct parts for your specific 1997 Mercury Cougar model.
This is a complex job. If you are not comfortable with this type of repair, it's strongly recommended you take your vehicle to a qualified mechanic. Improperly installed wheel bearings can lead to dangerous situations.
