Replace wheel bearing
Remove caliper, rotor, caliper bracket, lower ball joint shaft and two strut bolts. remove bearing housing and any snap rings. remove old bearing. replace and repeat in reverse. watch the abs sensor! costly if damaged. This is not for beginners...
SOURCE: replace front wheel bearings
The bearings in your car are pressed into a hub. If the part is available as an assembly, it can be replaced that way. Generally on a front drive car:
Remove wheels and brake calipers
If it is pressed in: remove the rotors, disconnect the drive shafts and remove the steering knuckle. Then the old bearing is pressed out and the new one pressed in with a machine shop press. If the bearing is part of the hub, that will be unbolted and the new one swapped.
On a scale of 1-10 difficulty, Id rate it a strong 7
SOURCE: Rear Wheel Bearing Repair; 2005 pontiac aztek
Remove the brake caliper
Remove the disc, (rotor)
Remove the 34mm nut on the axel shaft
Remove the three (3) bolts from the back side
You will need a wheel puller (three jaw will work well)
Place the puller over the hub and tighten, this will push the shaft out of the hub. Now you have to pull the hub assy. out of the mounting bracket. I found hitting each side,of the hub with a lead hammer to work well. Don't forget to disconnect the ABS senser on the back side of the hub assy.
Do not over tighten the 34mm axel nut when you install the new assy. If you use an impact whrench on it you will damage the bearing.
The bearings on the wheels has to be installed one way only, the rotor ring is built into the bearing and if installed the wrong way round the sensor cant pick up the wheel speed causing the ligt to be switched on in the cluster. The diagnostic equipment should pick this up as a fault once the car has been driven, it will see the sensor when you do the diagnostic if the car is standing still but once the car is moving and no signal is send from that wheel it would register a fault into the memory of the PCM that you would be able to retrieve later.
There is a way for you to test the sensor yourself by using a multimeter set on volts, you jack the vehicle up at that wheel, install a vehicle stand to support the vehicle to be safe, disconect the wheel speed sensor and probe the two wires into the sensor, spin the wheel by hand and a small amount of current will be produced meaning the the sensor is working and the wheel bearing is installed the correct way, you can also do a continuaty test on the sensor by switching the multimeter onto ohms, but be very carefull, if this sensor has three wires you cant do the continuaty test because of the integrated circuit in the sensor, the three wire sensors opperate on a voltage from 5Volt and it would be destroyed by the multimeter opperating on 9Volt.
If the continuaty test passes and the bearing is installed the correct way, the most comon fault would be a break in the wiring leading to the PCM
Hope this will be helpfull.
SOURCE: Replacing front wheel bearings
It isn't a particularly hard job but there are a few techniques that you need to know.
I wouldn't recommend you do it yourself but I would recommend you do it under supervision of someone who knows their stuff.
Retensioning the bearings correctly is extremely important.
SOURCE: replace front wheel bearings 99 ford explorer
not press fitted, standard tapered bearings, if 4X4 it is a little more involved, just dont misplace any of the smaller parts and you will be fine.
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