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Message |
Jonathan Morton
Guest
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 Posted:
Sun Sep 18, 2005 10:41 am Post subject:
Bearing-type noise that isn't bearings |
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Any thoughts on this one please? The car is a 2000 model S8 (80k miles) and
it has a rumble from the front end. It's quite bearable at cruising speed
but very noticeable at low speeds on good surfaces, where it appears as a
"wop, wop" noise each wheel revolution. Front discs and pads are new, so I
don't think it's a warped disc. Tyre wear is slightly uneven (more wear on
the outside of the tyre on both sides) but no worse than on the front tyres
of any Audi.
I suspected front wheel bearings, and last week I took it for service at a
VAG main dealer (Crewe Audi - nee Charles Audi). I told them about the noise
and said I suspected the bearings, but I told them they would need to
test-drive the car and listen to it. As soon as I'd uttered my suspicions I
regretted doing so, and guess what, they've just changed the bearings and
the noise is still there. They obviously haven't listened for the noise
either before or after doing the work.
Three questions. First, could this be worn inner or outer CV joints? Second,
could it (gulp!) be from the final drive? Third, can anyone in the UK
recommend a decent independent Audi specialist in the midlands who knows
about quattros and is actually interested in diagnosing a problem, rather
than just doing what the owner thinks might need doing? I was wondering
about BR Motorsport in Leamington. I'm in Staffordshire.
Thanks for any help.
Regards
Jonathan Morton
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BBO
Guest
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| Posted:
Sun Sep 18, 2005 10:26 pm Post subject:
Re: Bearing-type noise that isn't bearings |
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Jonathan Morton wrote:
| Quote: | Any thoughts on this one please? The car is a 2000 model S8 (80k miles) and
it has a rumble from the front end. It's quite bearable at cruising speed
but very noticeable at low speeds on good surfaces, where it appears as a
"wop, wop" noise each wheel revolution. Front discs and pads are new, so I
don't think it's a warped disc. Tyre wear is slightly uneven (more wear on
the outside of the tyre on both sides) but no worse than on the front tyres
of any Audi.
|
I'd check the rubber bushings in the front end. I had the same problem
on my Audi 100 and could have sworn it was the front bearings. I had the
shop check and they indeed indicated that it was the bearings, but they
also noticed that the lower, inner rubber bushings on both sides of the
front suspension lower arm was totally defective.
They wanted to replace both wheel bearings and the front shocks on a
hunch, but didn't mention replacing the rubber bushings. Although that
might have been obvious. Also, they wanted a hilarious sum for the job -
around 1500 dollars.
I took the car for a second opinion. The other mechanic checked the
bearings and said they were fine, but let's start with the cheap parts
first - and I had the bushings replaced.
Noise gone.
| Quote: | Three questions. First, could this be worn inner or outer CV joints? Second,
could it (gulp!) be from the final drive?
|
Check the rubber bushings first, and see if they are gone bad.
| Quote: | Third, can anyone in the UK
recommend a decent independent Audi specialist in the midlands
|
Can't help you there. Sorry.
--
azoth@dod.no
------------------------------------------------------------------------
Wenn im Zweifel, Volleistung! DoD#2101
'90 BMW 318i '93 Audi 100 2.3E When in doubt, floor it! |
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Tony
Guest
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| Posted:
Mon Sep 19, 2005 12:50 am Post subject:
Re: Bearing-type noise that isn't bearings |
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BBO wrote:
| Quote: | Jonathan Morton wrote:
Any thoughts on this one please? The car is a 2000 model S8 (80k
miles) and
it has a rumble from the front end. It's quite bearable at cruising speed
but very noticeable at low speeds on good surfaces, where it appears as a
"wop, wop" noise each wheel revolution. Front discs and pads are new,
so I
don't think it's a warped disc. Tyre wear is slightly uneven (more
wear on
the outside of the tyre on both sides) but no worse than on the front
tyres
of any Audi.
I'd check the rubber bushings in the front end. I had the same problem
on my Audi 100 and could have sworn it was the front bearings. I had the
shop check and they indeed indicated that it was the bearings, but they
also noticed that the lower, inner rubber bushings on both sides of the
front suspension lower arm was totally defective.
They wanted to replace both wheel bearings and the front shocks on a
hunch, but didn't mention replacing the rubber bushings. Although that
might have been obvious. Also, they wanted a hilarious sum for the job -
around 1500 dollars.
I took the car for a second opinion. The other mechanic checked the
bearings and said they were fine, but let's start with the cheap parts
first - and I had the bushings replaced.
Noise gone.
Three questions. First, could this be worn inner or outer CV joints?
Second,
could it (gulp!) be from the final drive?
Check the rubber bushings first, and see if they are gone bad.
Third, can anyone in the UK
recommend a decent independent Audi specialist in the midlands
Can't help you there. Sorry.
A friend with a TT had a similar grinding sound that was very noticable at low |
speed a few weeks ago. I drove it and usupected wheel bearings or inner CV. He
asked if it could be tires. I said it could but didn't really think so.
A few days later he tried changing to his winter tires and sound was gone.
The offending tires were a fairly new set of Perellis (don't know the model or
the spelling) with normal wear pattern.
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dave AKA vwdoc1
Guest
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| Posted:
Mon Sep 19, 2005 4:01 am Post subject:
Re: Bearing-type noise that isn't bearings |
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I vote tires too
move them to a different corner and see if the noise also moves
you can do that! :-)
later,
dave
(One out of many daves) |
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Jonathan Morton
Guest
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| Posted:
Thu Sep 22, 2005 7:32 pm Post subject:
Re: Bearing-type noise that isn't bearings |
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"dave AKA vwdoc1" <vwdoc1@ameritech.net> wrote in message
news:rlmXe.166$rx5.111@newssvr22.news.prodigy.net...
| Quote: | I vote tires too
move them to a different corner and see if the noise also moves
you can do that! :-)
|
Well, I'm going to try that in daylight this weekend. Meanwhile today I
jacked up the car on one side and just turned the offending wheel. No
obvious noise - which rather supports the tyre noise theory. But would a
worn CV joint be expected to make a noise if not under load?
Thanks for the earlier feedback
Regards
Jonathan |
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Tony
Guest
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| Posted:
Fri Sep 23, 2005 1:49 am Post subject:
Re: Bearing-type noise that isn't bearings |
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I still feel the the tires might be your problem but Audi bearings can be noisy
when going bad when under load but have almost no apparent symptoms when turned
by hand while unloaded.
Not sure on the inner CVs. That was an opinion that was given to me by a very
experienced Audi mechanic when discussing a similar problem on a friend's TT
(the one with the tires causing the noise).
Jonathan Morton wrote:
| Quote: | "dave AKA vwdoc1" <vwdoc1@ameritech.net> wrote in message
news:rlmXe.166$rx5.111@newssvr22.news.prodigy.net...
I vote tires too
move them to a different corner and see if the noise also moves
you can do that! :-)
Well, I'm going to try that in daylight this weekend. Meanwhile today I
jacked up the car on one side and just turned the offending wheel. No
obvious noise - which rather supports the tyre noise theory. But would a
worn CV joint be expected to make a noise if not under load?
Thanks for the earlier feedback
Regards
Jonathan
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Rusty NAilz
Guest
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| Posted:
Fri Sep 23, 2005 8:12 am Post subject:
Re: Bearing-type noise that isn't bearings |
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Jonathan,
Please let me know how you fare. I have an A6 with similar sounding issues.
Mine seems more of a vibration between 60 ~70 MPH. The dealership noted the
problem and initiate a series of rebalancing of the tires to no avail. In
sofar as to assist with tire replacement. Issue still there.
Bob
"Jonathan Morton" <jonathan@jonathanmortonbutignorethisbit.co.uk> wrote in
message news:dgjg9j$633$1@nwrdmz03.dmz.ncs.ea.ibs-infra.bt.com...
| Quote: | Any thoughts on this one please? The car is a 2000 model S8 (80k miles)
and
it has a rumble from the front end. It's quite bearable at cruising speed
but very noticeable at low speeds on good surfaces, where it appears as a
"wop, wop" noise each wheel revolution. Front discs and pads are new, so I
don't think it's a warped disc. Tyre wear is slightly uneven (more wear on
the outside of the tyre on both sides) but no worse than on the front
tyres
of any Audi.
I suspected front wheel bearings, and last week I took it for service at a
VAG main dealer (Crewe Audi - nee Charles Audi). I told them about the
noise
and said I suspected the bearings, but I told them they would need to
test-drive the car and listen to it. As soon as I'd uttered my suspicions
I
regretted doing so, and guess what, they've just changed the bearings and
the noise is still there. They obviously haven't listened for the noise
either before or after doing the work.
Three questions. First, could this be worn inner or outer CV joints?
Second,
could it (gulp!) be from the final drive? Third, can anyone in the UK
recommend a decent independent Audi specialist in the midlands who knows
about quattros and is actually interested in diagnosing a problem, rather
than just doing what the owner thinks might need doing? I was wondering
about BR Motorsport in Leamington. I'm in Staffordshire.
Thanks for any help.
Regards
Jonathan Morton
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Jonathan Morton
Guest
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| Posted:
Sat Sep 24, 2005 11:11 am Post subject:
Re: Bearing-type noise that isn't bearings - the final diagn |
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"Tony" <tonyjnospam@nospamvisi.com> wrote in message
news:11j666pgirvprdf@corp.supernews.com...
| Quote: | I still feel the the tires might be your problem but Audi bearings can be
noisy
when going bad when under load but have almost no apparent symptoms when
turned
by hand while unloaded.
Not sure on the inner CVs. That was an opinion that was given to me by a
very
experienced Audi mechanic when discussing a similar problem on a friend's
TT
(the one with the tires causing the noise).
|
Well I changed the front and rear tyres over and... the noise is duller and
has moved to the back of the car. So it was the tyres.
On close inspection the one on the left (where the noise was coming from)
had significantly uneven wear at different points round its circumference
with one particular "flat spot" on the inner edge - though it was still
legal.
I think I can be forgiven for not spotting this until I took the wheel off,
but bearing in mind that the Audi dealer last week had the wheels off to do
the bearings *and* purported to measure the tread depth on all four tyres as
part of a "health check", I'm not exactly delighted.
Two new Contis have been ordered - and mortgage increased :-(
Thanks for all the earlier feedback.
Jonathan |
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Tony
Guest
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| Posted:
Sun Sep 25, 2005 2:20 am Post subject:
Re: Bearing-type noise that isn't bearings - the final diagn |
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Good to hear you found the problem. It does sound like my friend's TT problem.
My son with his A4 2.8q Had the same thing a couple of months ago as well.
With that amount of irregular tread wear and noise it must have been broken
cords and/or delamination which is a significant safety issue. I would have some
words with the dealer about their missing it a week ago. The dealer issue tends
to support my feeling that most of the techs at dealers now days can't diagnose
anything unless the computer tells them the answer.
Might be worth asking the tire manufacturer to prorate replacements.
Tony
| Quote: |
Well I changed the front and rear tyres over and... the noise is duller and
has moved to the back of the car. So it was the tyres.
On close inspection the one on the left (where the noise was coming from)
had significantly uneven wear at different points round its circumference
with one particular "flat spot" on the inner edge - though it was still
legal.
I think I can be forgiven for not spotting this until I took the wheel off,
but bearing in mind that the Audi dealer last week had the wheels off to do
the bearings *and* purported to measure the tread depth on all four tyres as
part of a "health check", I'm not exactly delighted.
Two new Contis have been ordered - and mortgage increased :-(
Thanks for all the earlier feedback.
Jonathan
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Jonathan Morton
Guest
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| Posted:
Sun Sep 25, 2005 9:00 am Post subject:
Re: Bearing-type noise that isn't bearings - the final diagn |
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"Tony" <tonyjnospam@nospamvisi.com> wrote in message
news:11jbgognrjmla0a@corp.supernews.com...
| Quote: | With that amount of irregular tread wear and noise it must have been
broken
cords and/or delamination which is a significant safety issue. I would
have some
words with the dealer about their missing it a week ago. The dealer issue
tends
to support my feeling that most of the techs at dealers now days can't
diagnose
anything unless the computer tells them the answer.
|
My thoughts entirely. It does hack me off that I'm a better technician than
they are.
| Quote: | Might be worth asking the tire manufacturer to prorate replacements.
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True, but it might not! These were Dunlops BTW, not some cheap brand. My
local tyre stockist has had to order the new ones so I'm not having them
fitted till next Saturday. I'll be very interested in their reaction. These
are the remaining two tyres which were on the car when I bought it last
year. I must say I'm always happier with used cars once I know that I put
all the tyres on - you just don't know how badly the previous owner has
treated them.
Regards
Jonathan |
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