Tools You'll Likely Need:
* Jack and jack stands: Absolutely essential for safety. Never work under a car supported only by a jack.
* Wheel chocks: To secure the vehicle.
* Lug wrench: To remove the wheel.
* Torque wrench: Crucial for tightening bolts to the manufacturer's specifications.
* Sockets and wrenches: A variety of sizes will be needed, likely including metric sizes.
* Ball joint separator: To separate the ball joint from the control arm. A pickle fork is less preferred as it can damage the ball joint.
* Hammer and punch: Possibly needed to remove stubborn parts.
* Press or bearing separator: Essential for removing and installing the wheel bearing. A press is ideal, a bearing separator is a more DIY-friendly alternative, but may still require some finesse.
* Penetrating oil: To help loosen rusted or seized parts.
* New wheel bearings: Get the correct part number for your Impala.
* New ABS sensor (if applicable): Often the ABS sensor is integrated with the bearing assembly and needs replacement.
* New cotter pin and castle nut: These are often replaced during the process.
* Grease: Pack the new bearing with suitable grease.
* Clean rags: Keep your workspace clean.
* Repair manual: Provides specific torque specs and procedures.
General Steps (Consult your repair manual for specifics!):
1. Safety First: Park on a level surface, engage the parking brake, and use wheel chocks on the rear wheels. Raise the front of the vehicle using the jack and securely support it with jack stands.
2. Remove the Wheel: Remove the lug nuts and take off the wheel.
3. Disconnect Brake Caliper: Carefully remove the brake caliper and hang it securely out of the way using zip ties or a wire. Don't let the brake line hang freely; it could damage the line.
4. Disconnect the ABS Sensor (if applicable): Carefully disconnect the ABS sensor from the hub assembly.
5. Remove the Axle Nut: Unscrew the large axle nut. This might be very tight and require impact tools or a breaker bar.
6. Separate the Ball Joint: Use a ball joint separator to separate the lower ball joint from the control arm.
7. Remove the Hub Assembly: Once the ball joint is separated and the axle nut is off, the hub assembly should be able to be removed. This may require some gentle persuasion.
8. Remove the Old Bearing: This is where the press or bearing separator is crucial. Carefully remove the old wheel bearing. Note its orientation for proper installation of the new bearing.
9. Install the New Bearing: Using the press or separator, carefully install the new wheel bearing into the hub assembly. Ensure it's seated correctly. Pack the bearing with fresh grease.
10. Reassemble: Reassemble everything in the reverse order of disassembly, making sure to properly seat the ball joint, torque the axle nut to the correct specification (this is CRITICAL), and reconnect the brake caliper and ABS sensor.
11. Torque Specifications: Refer to your repair manual for the correct torque specifications for all bolts and nuts. Incorrect torque can lead to premature failure or safety hazards.
12. Lower the Vehicle: Carefully lower the vehicle.
13. Test Drive: After reassembly, test drive the vehicle to ensure everything is working correctly. Listen for any unusual noises from the wheel.
Warnings:
* This is a complex job. If you're not comfortable working on cars, take it to a qualified mechanic.
* Improperly installed wheel bearings can lead to accidents. Do not attempt this repair unless you have the necessary skills and tools.
* Incorrect torque values can cause serious damage. Always refer to your repair manual for correct specifications.
* Always prioritize safety. Use jack stands, wheel chocks, and follow all safety precautions.
This is a simplified overview. Consult a repair manual specific to your 2001 Chevy Impala before attempting this repair. The manual will provide detailed instructions, diagrams, and torque specifications. Failing to do so could result in damage to your vehicle or injury to yourself.
