Here's a general outline of the process. Remember, this is a simplified overview and may not cover all variations or potential issues:
1. Preparation:
* Safety First: Disconnect the negative battery terminal. Use jack stands to safely support the vehicle – never work under a vehicle supported only by a jack. Wear safety glasses and gloves.
* Gather Tools: You'll need a variety of tools, including: jack and jack stands, wheel chocks, lug wrench, socket set (metric), torque wrench, ball joint separator, tie rod end separator, hammer, punches, a bearing race installer/remover (essential!), pry bar, grease, and possibly a press (depending on how you remove/install the bearing). A repair manual will list the specific tools needed.
* Parts: Obtain the correct front wheel bearing assembly for your Aztek. It's usually sold as a complete unit, including the hub.
2. Removal:
* Remove the Wheel: Loosen the lug nuts, raise the vehicle, secure it on jack stands, and remove the wheel.
* Disconnect Brake Caliper: Carefully remove the caliper and hang it out of the way using a wire or bungee cord to avoid stressing the brake line.
* Remove the Rotor: Remove the rotor (brake disc).
* Disconnect ABS Sensor (if applicable): Disconnect the ABS speed sensor wire.
* Remove the Axle Nut: This is usually very tight; use a breaker bar if necessary. Mark the nut's position relative to the axle before removing it to ensure proper reassembly.
* Separate Ball Joint and Tie Rod End: Use appropriate tools (ball joint separator and tie rod end separator) to separate these components from the steering knuckle.
* Remove the Steering Knuckle: Remove the bolts securing the steering knuckle to the strut.
* Remove the old Bearing/Hub Assembly: This is where the bearing race installer/remover becomes crucial. The bearing is usually pressed into the hub assembly. You may need to use a press or other specialized tools to remove the old bearing.
3. Installation:
* Install the new Bearing/Hub Assembly: Use the bearing race installer/remover to carefully install the new bearing into the hub. Ensure the bearing is seated correctly.
* Reassemble in Reverse Order: Carefully reassemble everything in the reverse order of removal, making sure to torque all bolts and nuts to the manufacturer's specifications (found in your repair manual). Pay close attention to the axle nut's position if you marked it.
* Reconnect Brake Caliper: Ensure the caliper is properly seated and the brake pads are contacting the rotor.
* Reinstall the Wheel: Tighten the lug nuts to the correct torque.
* Lower the Vehicle: Carefully lower the vehicle to the ground.
* Final Checks: Double-check all connections and torque settings. Test drive the vehicle carefully to ensure everything is working correctly.
Warnings:
* Incorrect installation can lead to serious damage or injury.
* Always consult your repair manual for specific instructions and torque specifications.
* If you are not comfortable performing this repair, take your vehicle to a qualified mechanic. The cost of a professional repair will likely be less than the cost of replacing damaged parts due to incorrect installation.
This is a complex repair. Don't attempt it unless you have experience working on cars and the appropriate tools. The information above is for guidance only and shouldn't substitute for a proper repair manual. Improper installation can cause serious safety hazards. If in doubt, get professional help.
