2004 Oldsmobile Alero Repair Wheel Bearing
A worn wheel hub transfers higher-than-average pressure to the axle, leaving the axle and other suspension components susceptible to excessive wear. A worn wheel hub will usually emit a low humming sound which can be heard while traveling above 25 MPH, which increases in volume at higher speeds. It may also trigger service lights on the instrument panel. Most owners can avoid a repair bill from a professional mechanics or service center by performing the repair themselves on a 2004 Oldsmobile Alero.
 Tools Used
 Repair Wheel Bearing
- Pry the center hub nut cover on the wheel off with a standard screwdriver. Loosen the hub nut with a socket wrench, but don't remove it. Loosen the lug nuts, but don't remove them. Lift the vehicle up with a hydraulic vehicle jack. Place jack stands under the frame rails to secure the vehicle while changing the wheel hub. Remove the lug nuts with a socket wrench. Pull the wheel from the wheel studs. Remove the hub nut and washer from the axle with a socket wrench.
- Remove the brake caliper mounting bolts with a socket wrench. Lift the brake caliper from the brake caliper brackets and hang it with a piece of wire. Avoid stretching the brake caliper hose when handling and hanging the caliper. Remove the brake caliper mounting bolts with a socket wrench and pull the caliper bracket from the brake disc. Unplug the ABS speed sensor. Pull the brake disc off of the wheel hub and off of the axle.
- Remove the three mounting bolts holding the wheel hub to the steering knuckle with a socket wrench. The bolts are located on the rear of the steering knuckle. If you can't access the bolts with a socket wrench, add a swivel socket to the end of the socket wrench. With the bolts removed, attach a hub puller to the wheel hub. Place the bolts near the sides of the puller in the thread holes on the wheel hub, while placing the center bolt against the axle shaft. Turn the center bolt on the puller with a socket wrench, driving the axle in and drawing the wheel hub out, to separate the hub from the axle. Remove the hub and hub puller once they are separated.
- Guide the axle through the new wheel bearing hub and set the hub against the steering knuckle, routing the ABS speed sensor through the appropriate hole in the steering knuckle. Install the three retaining bolts with a torque wrench. Add a swivel socket to the end of the torque wrench if needed to properly access the bolts. Tighten the bolts to 70 foot-pounds.
- Plug in the ABS speed sensor. Slide the brake disc over the axle and against the wheel hub. Place the brake caliper bracket over the brake disc and install the bracket mounting bolts with a torque wrench. Tighten the bracket mounting bolts to 85 foot-pounds. Remove the brake caliper from the wire and place it on the brake caliper bracket. Install the brake caliper mounting bolts with a torque wrench, tightening the bolts to 23 foot-pounds.
- Place the hub washer over the axle and install the hub nut. Place the wheel over the wheel studs and place the lug nuts onto the wheel studs. Remove the jack stands and lower the vehicle with the hydraulic jack. Tighten the lug nuts with a torque wrench to 100 foot-pounds and the hub nut to 150 foot-pounds. The hub nut may require a different torque setting, depending on the manufacturer of the wheel hub. If the setting is different, the paperwork will be included with the wheel hub.