2004 Pontiac Montana Q&A
2004 Pontiac Montana Question: Why do I constantly have to replace the front wheel bearings?
I have owned the vehicle for 4 years now and probably have gone through about 8 sets of front wheel bearings. Some were cheaper products while others were supposed to be top of the line USA products. They last a few months to less than a year. Any thoughts on why I am having this issue all the time? They replace them under warranty, but this is getting ridiculous. Dave - dhuffy
Are you having the same shop putting the bearings in? Maybe they're not following a prudent procedure and damaging them. I might want to find another shop, somethings wrong in this picture. I can't understand how wheel bearings (I assume that they're sealed units) could go bad like that, even if the alignment is bad. You don't commonly strike curbs or parking lot bumpers, do you? That may be enough abuse to cause it but what you report is very unusual. If you want to find a specialist, here's a directory link for you: https://repairpal.com/directory?address=16510&car_brand_names=Pontiac - Superbob
Make sure your wheel isn't bent, the tires are in good condition and balanced well, also get the brake disc checked for warpage. If the brake keeps overheating because of brake failure or driver error it could destroy the grease in the bering which will cause premature wear. Bent, vibrating CV axles could also be the problem. Is the car drives smooth, without ANY vibration at all? Zee - ZeeTech
Improper torque is the main reason for premature failure of most newly installed bearing & hub assemblies. Too many times, I've watched some "so-called" technicians just use a impact gun to apply tightness to the axle nut. This is the nut that MUST be torqued with a torque wrench to apply proper torque & preload on the bearing & hub assembly. I worked beside a guy that didn't see the need to use the torque wrench to torque the axle nut, after he replaced the same bearing & hub assembly 3 times on the same car in 10 months, I was asked to take over & install the 4th assembly. I used the torque wrench & applied the proper torque to the axle nut, that was 2 years ago & it is still going strong! There is NO substitute for professionalism & the use of a torque wrench to set the proper torque & preload to the assemblies! - tazzmanaian
Before changing anything, check the abs harness. If it is not shorted, follow my next advice. There are two reasons you have failures. Not purchasing the brand (Ac/Delco) that came on your vehicle and improperly tightening the spindle nut. I can't tell you how many Youtube videos I have seen that showed people using an impact wrench to torque down the spindle nut. You have to get out the service manual and torque the spindle nut using a torque wrench to the specification. Buying cheap aftermarket hub bearings is a mistake because those are made with cheap parts and wear out quickly. - TheGmGuy