Question about 2004 Oldsmobile Alero

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Replace front wheel bearing is it hard to do on 2002 alero

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Its actually pretty easy if you have the basic tools needed and a little mechanical knowledge, because i dont think you can buy just the bearing at a auto parts store. they sell you the whole hub assembly which is great for the DIYer.

lift the car off the ground and block it from rolling and place a jack stand under it so it cant fall on anyone.


Wheel Bearings

replace front wheel bearing - printpage_icon.gif

Removal & Installation

These vehicles are equipped with sealed hub and bearing assemblies. The hub and bearing assemblies are non-serviceable. If the assembly is damaged, the complete unit must be replaced.
  1. Before servicing the vehicle, refer to the precautions section.
  2. Remove or disconnect the following:
    WARNING DO NOT allow the caliper to hang unsupported from the brake hose.


    Front wheel Halfshaft nut and washer Caliper from the steering knuckle and support it aside


    Brake rotor Anti-lock Brake System (ABS) connector, if equipped 3 hub/bearing assembly bolts Halfshaft from the hub/bearing assembly Hub/bearing assembly

    0900c1528023b277.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Exploded view of the front hub/bearing assembly


To install:
Install or connect the following:

Hub/bearing assembly onto the halfshaft, making sure the splines engage smoothly Hub/bearing assembly to the steering knuckle. Torque the bolts to 70 ft. lbs. (95 Nm). Anti-lock Brake System (ABS) connector, if equipped Brake rotor Caliper onto the steering knuckle. Torque the bolts to 38 ft. lbs. (51 Nm). Halfshaft nut. Torque the hub nut to 284 ft. lbs. (385 Nm) on nuts colored black, or 173 ft. lbs. (235 Nm) on gray colored nuts. Front wheel. Torque the nuts to 100 ft. lbs. (140 Nm).

Posted on Jul 27, 2009

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YES IT IS LITTLE HARD

Posted on Jul 27, 2009

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Define what you think is hard? wheel has to come off rotor and caliper two bolts. then if its a front wheel drive you have to remove the axle on that side disconnect the tie rod end and disconnect the lower ball joint force the A frame down then pull wheel bearing out and depending on the type bearing if it is a sealed unit you must punch out inner bearing and wheel seal and outer bearing and you have to replace Race ring inner and outer, If it's a sealed bearing you have to hammer out the old bearing or press it out and press in the new bearing.

Posted on Jul 27, 2009

  • rocketmanpj Oct 31, 2010

    This is not correct, you do not have to pull the ball joint for an alero/Grand Am. For a "GURU" to post "if its a front wheel drive" on a platform that ONLY came as front wheel drive kills all credibility. You do not have to do anything with the races, the replacement parts come as a complete unit which includes the hub, speed sensor and bearings.

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Sounds characteristic of a BAD speed sensor in one of your wheel hubs. Unfortunately, there's no simple solution to replacing a speed sensor. You either have to replace the entire wheel hub in which the bad sensor is located, or if it's a bad wire in the pigtail you will need to replace the pigtail. In a 2001 my money would be on having to replace one of your front wheel hubs. It can be a one hour job, or a three hour job depending on how hard it is to remove the bad wheel hub. You will first need to have a shop run the diagnostics. AutoZone and the like only run the simple diagnostics, but Minekie advertizes that they will run the diagnostics FREE. A shop will charge between $300 and $425 to replace a wheel hub, depending if you want the Chineese bearing or Timkin bearing. You can buy the part yourself for between $50 and $100 at most autoparts stores.

It's not an easy fix, but one most Alero and GrandAm owners have plenty of experience with.

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Could be brakes/rotors, or wheel bearing. The mileage on the car would be helpful.
Jack up the front of the car and then take each front wheel at the 12 and 6 o'clock positions and try to wobble it. If you get any movement you likely have a bad wheel bearing. If they seem tight, then look more towards an issue with brakes/rotors.

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That's indicative of a wheel bearing, which is why you were told to change that out. However, it's also possible that the carrier bearings in the differential (where the drive axles attach) have gone bad. That happened to me on my 300ZX several years ago, and I had to replace the diff bearings. I would have them checked out somewhere other than a dealer (you'll probably get a better price from an independent shop).

As a sidenote, to be sure it wasn't a wheel bearing, if you hear it quiet down in a turn one way but get louder in a turn the opposite way, it's likely the wheel bearing. If you turn left at speed and it gets louder, then it's the right bearing (since you're loading up that side of the car). If it gets quieter in a right turn, it's the right side (you're unloading that side of the car and not putting as much weight on it, so it doesn't drag as badly). See if you get that symptom just to be sure that the wrong side front wheel bearing wasn't changed.

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