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Car Forum / Audi Cars / January 2009dum dum dum
Coming from the front end of my A4 2.4 V6 SE Sedan at 92k miles. It's more noticeable at lower speeds around 20/30 mph. It's not so much a noise more a sound/feeling. I thought it was a plugged tyre but have had both fronts replaced with new and still sensing it. It's just flown through an MOT so cannot believe it's a bearing or drive coupling. Belts, water pump and tensioners replaced at 65K. dj You never know when bearings are going to go out but 92k would be a point that I would suspect them. The sound you describe would indicate bearings also. If you are driving at about 40 mph and turn the steering slightly to either side and the sound increases then you can pretty much count on it being bearings. > Coming from the front end of my A4 2.4 V6 SE Sedan at 92k miles. It's more > noticeable at lower speeds around 20/30 mph. It's not so much a noise more a [quoted text clipped - 9 lines] > > dj Thanks, I will do some closer inspection on them. > You never know when bearings are going to go out but 92k would be a point > that I would suspect them. The sound you describe would indicate bearings [quoted text clipped - 17 lines] >> >> dj > You never know when bearings are going to go out but 92k would be a point > that I would suspect them. The sound you describe would indicate bearings [quoted text clipped - 17 lines] >> >> dj I have only just had the will power to check all bearings outside in our -3.5C shinny bright but cold UK conditions. The fronts had no play when turned through all angles and the wheels spun without a rumble and only a slight rubbing from the pads. The rears had a smidgen of play (near side more than off) so I gave them one flat to the next split pin location, not tight, not loose and they run free with no play. Could I have been hearing the (a) rear bearings........have yet to do a run and will report back after. dj >> You never know when bearings are going to go out but 92k would be a point >> that I would suspect them. The sound you describe would indicate bearings [quoted text clipped - 32 lines] > > dj NO its not the rear bearings either........must be something in the drive train. Ah well turn up the music. > >> [quoted text clipped - 43 lines] > > Could still be bearing related. I have replaced a number of Audi bearings and I don't remember play even when they were bad. Still, you are probably right that they ar not the source of the sound. Other things to consider are the drive shaft center bearing or loose worn engine mounts or sway bar connections. Good luck and keep the music playing. >> >>> [quoted text clipped - 51 lines] > > Good luck and keep the music playing. Another thought on the bearings. If I understand correctly, you tightened the center bolt on the axle shaft thinking that you were tightening tolerance on the bearing race. That would work if these were tapered bearings but they are not. The bearings are dual race and tightening the center bolt only increases the tension on the axle but does not change the bearing race tension so would not have any effect on sound from a failing bearing. >>>>> You never know when bearings are going to go out but 92k would be a >>>>> point that I would suspect them. The sound you describe would indicate [quoted text clipped - 51 lines] > bearing race tension so would not have any effect on sound from a failing > bearing. the picture in the Haynes manual showed the rears as a tapered race. The front I believe are dual parallel. AFAIK To "accurately" examine the wheel bearings to determine if they are bad, you should disconnect anything that causes friction with that wheel. In the rear (non-quattro) you will need to remove the brake pads so you can spin the wheels while listening to any rotational noise. In the front you will need to remove caliper (rotor too) and CV Joint so you can just spin the hub only. You are carefully listening for any rotational noise along with feeling for the lack of smoothness while turning the hub. Trained ears can possibly "pinpoint" which wheel is making the noise but I have found that sometimes noises can be quite deceiving. lol After some time the noise will get louder and easier to find! ;-) OR you can change out all bearings and hope that this "shotgun" approach repairs it! JMHO  Signaturelater, (One out of many daves) 1997 Red A4 1.8tq auto "TonyJ" <"tonyjnospam at nospam visi.com"> wrote in message snip >>> I have only just had the will power to check all bearings outside in >>> our -3.5C shinny bright but cold UK conditions. [quoted text clipped - 22 lines] > > Good luck and keep the music playing. > Coming from the front end of my A4 2.4 V6 SE Sedan at 92k miles. It's more > noticeable at lower speeds around 20/30 mph. It's not so much a noise more [quoted text clipped - 9 lines] > > dj further to...I had a mechanic drive it yesterday and he confirmed at least 1 bearing has gone. So I am having both fronts changed today. > >> Coming from the front end of my A4 2.4 V6 SE Sedan at 92k miles. It's more [quoted text clipped - 17 lines] > > Good to hear that you seem to have found the culprit. The rear bearings also seem to have their share of problems in the A4... >>> Coming from the front end of my A4 2.4 V6 SE Sedan at 92k miles. It's >>> more noticeable at lower speeds around 20/30 mph. It's not so much a [quoted text clipped - 16 lines] > > The rear bearings also seem to have their share of problems in the A4... I picked up the car and she's real quiet now. The engineer said as soon as he road tested it he knew it was one of the fronts gone. Also they are such large bearings that only by taking off the calliper assembly and rolling the wheel would you have any idea that one might be faulty. Just the normal 12 and 6 test is not normally good enough. Anyway its all done and dusted thanks. The thing is it was MOT'd only a month ago and as cars are not road tested now they would not have picked it up. Which does say something for the old MOT system. Thanks for posting the results! Glad that the problem was solved! See it wasn't too much trouble when you isolate the possible cause of the problem from the attached components. ;-) Signaturelater, (One out of many daves) 1997 Red A4 1.8tq auto >>>> Coming from the front end of my A4 2.4 V6 SE Sedan at 92k miles. It's >>>> more noticeable at lower speeds around 20/30 mph. It's not so much a [quoted text clipped - 27 lines] > now they would not have picked it up. Which does say something for the old > MOT system. > Thanks for posting the results! > Glad that the problem was solved! [quoted text clipped - 32 lines] >> tested now they would not have picked it up. Which does say something for >> the old MOT system. its actually like running a new car....strange how we get used to sounds if they approach gradually. |
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