okay i have a 88 vw polo, there been a noise that sounds just like a worn wheel bearing from n/s/front...the typical wurr wurr noise
so i fitted a new bearing..old one looked servicable and the new one didnt improve things at all
today i pulled back the cv boot...there was enough grease in there and every thing looked good...so i regreased it and put the boot back ive also recently changed the gearoil..no swarf in the old oil
so guys...what now?
this wurr wurr is noticable from walking speed up to 50-60 where the road/engine noise cover it,its worse when not straight ahead and at its quietest when accelerating( but that maybe engine noise drowning it out)
|
Brake disk warped?
Bearing in gearbox (unlikely for polo)?
Tyre problem perhaps?
|
hmmmm i dont think its a disc, could the tyre be noisey but look okay?
it recently had 2 budget tyres fitted up front...i spose i could swap em round
im kinda thinking it could be the box...but why would slightly turning (like 5mins on a clock) make it worse
dipping the clutch/taking it out of gear doesnt change it at all
|
I recently had a similar noise on my 306, I long thought that one of my wheel bearings was on the way out.
That was until I checked the pressure in the OSR tyre, about 12 psi! Took the car straight to local tyre place, turned out that the tyre was deformed and the sidewall was soft and badly perished/cracked.
The new tyre cured the noise problem.
|
|
|
Budget tyres are the worst for causing problems.I would try changing around. ie front to back and see what happens. If no improvement. then a re think on CV joint.Just because they look good wont mean it is..
--
Steve
|
|
|
|
|
|
you say you havereplaced n/s/f bearing why was it rumbling reason i ask is polo's were renowned for a problem like this we used to get customers in saying front wheel bearing has gone and after checking we would phone them to tell them it's actually the rear bearing on the opposite side . polo is just one of those cars which seems to transmit noises strangely , ie you drive it and everything says front bearing and it's actually a rear one .worth a look....cheers ...keo.... ex vw mechanic
|
keo....i couldve sworn the front bearing was shot, fitting the new one made no differance at all, so i guess it was fine
its an 88 polo...the ugly van looking thing, so your telling me it REALLY sounds that convincing?? its just the car aint worth much and i cant keep replacing good parts
how would i decide on the condition of the rears??? theyre greased and have no slop..nothing noticably bad when i spin em
thanks for your help
|
To check the rears, just remove the drum, clean the bearings and the surfaces & look for pitting in the components.
I've had a few VWs of this type. The rear berings always had a bit of play in them but seemed fairly sturdy.
Same with the CVs and the gearbox.
Although saying that - the boxes do leak oil - it might be empty?
Are you confident that the front bearings were done properly? Were they done both sides? Steering fairly sharply puts more load onto one side, which makes the rumbling bearing even noisier. Steering to the opposite side relieves load and the rumbling stops for a brief period.
Wheel bearings definitely a weak spot on these cars.
|
|
Correct that - FRONT wheel bearings are a weak spot on these cars.
|
|
|
|
|
Common problem, sounds like a front but ends up being a rear. Either remove the drum and the rear grease seal to allow you to clean inpsect and regrease if ok or fit new bearings the kit is £8.40 odd plus vat or go to a local MOT centre and see if they will put the rears on the brake tester and spin them up whilst your inside the car. My son had this exact senario a few weeks back, changed a front that infact did have play in it and the noise was still there and was found to be a rear, no slack just the bearing surface was breaking up. Regards Peter
|
|
Same noise problem on my Omega was diagnosed by three separate "proper" mechancial types as wheel bearings. After changing them all with no improvement, it turned out to be deformed tyres. Fronts were worse. They were Avon ZZ somethings, and definitely didn't feel like budget tyres to my credit card...
|
|
|
|
|
like mentioned elsewhere strip it down and have a look at rears difficult to tell by spinning because of brakes always make a bit of noise but if rumbling then obviosly shot they may be ok but it was a common problem people thinking front bearings were gone and it was actually rears . euro carparts or german swedish french should be able to supply the parts cheap . try rolling it down a hill without the engine running see if the noise is still there , helps eliminate other things.....cheers...keo
|
|
Tosh, The brakes rarely rub the drum on the polo the problem is there is no load on the bearing when you jack it up. Regerds Peter. Change more bearings then you have had hot dinners.
|
thanks for replys guys..
would rolling down a hill with no engine eliminate gearbox bearings?? sounds like a good idea
|
|
Dunno, but I did all that for my trained mechs and they were all (wrongly) convinced it was bearings.
|
|
|
|
|
disagree brakes can and do rub slightly depending on adjustment levels of dust in drums etc and i dont know how many bearings you have changed but i used to do such for a living and it was in a volkswagen main dealer as well as 2 other independant volkswagen specialists. i still maitain that the advice i gave is relevant i dont say it is correct just advise looking at what i have pointed out , without seeing the car hearing the noise etc you can only give advice to the symptoms described. ihave not stated that it is any particular thing nor advised replacement of any parts in particular just advised looking in a particular direction ....and this is apparently tosh ps i expect i have changed hundreds (maybe more) of POLO bearings how many POLO bearings have you changed
|
|
Keo-the-dog, didn't mean to offend but I have never had a drum handbrake on a Polo or Golf rub assuming no fault that is. There are three on my drive now an I can guarantee non of them are rubbing if you just timed it by accident and the auto adjuster had just gone up one click it may just be rubbing for a mile or two. If they were always rubbing like you suggest you would have really hot drums that's for sure. Regards Peter
|
|
I've owned a golf and two polos with the same rear drums. All of them made a slight rubbing noise when spinning the drums with the wheels off - as have all other cars I have owned.
|
well the polo in question does have a slight rub..i like to think the brakes are ajusted right that way
thanks for tips guys....i hope to get it sorted soon as poss
|
If rear shoes are correctly adjusted.this will happen.
Assuming taper bearings.(no need to take wheel off)jack up and wobble wheel one hand on top of tyre. Other on bottom.push pull alternatley between hands..any excessive play will be felt.if any found try re`adjusting nut pressure ie tighten up to just over hand tight/then check play. if after tightning play is still excessive.time for a new bearing. If it adjusts up without any play..It may need regreasing assuming it is a dry bearing..
--
Steve
|
|
no problem steve just that i remember many times with rear brakes on polo a slight drag which to the unexperienced could give a slight noise that many thought was their bearings , rear bearings admitedly are not renowned for going on polos but when they do many people think its a front one usually opposite side
|
|
|
|
|
|
Have you checked the inboard cv joints which are next to the gearbox and diff. I had such a noise on a Mk 1 Golf, the noise lasted for about 1,500 miles until the joint failed. Over the years it has been the only time I have had a inner joint fail as against 4 outer one's.
|
GGH what did the inner sound like?? did it change when steering/straight etc
thanks
|
|
|
|
