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Re: tapping sound
In a message dated 97-06-05 22:51:31 EDT, jkot+@pitt.edu (Joan Kotjarapoglus)
writes:
<< For at least several years
prior, there is a valve tapping sound that comes on between 2400 -
3000rpm, none audible above or below, and not while sitting in neutral
and engine reved to 3000rpm. If cruising down a flat highway, even under
light light load, you will hear the tapping sound.
I had always assumed it was an engine problem, but mechanics whose
opinion I respect though it was ehaust related. Over
time, I have replaced all of the mufflers and cat. Even had the exhaust
manifold pulled, machined flat and broken studs replaced. The noise
still remains. It is even more evident now that I hav replaced one of
the noisy mufflers. Car otherwise runs fine and has about 120k miles on
engine. Checked compression and all cylinders where within same range
and comparable to my 1985 with a rebuilt head purchased from audi.
Does anyone have an wisdom to impart on the source of problem -
lifters - valve guides - floating valve???? HELP
George Kotjarapoglus jkot@pitt.edu >>
George, I too would think it would be exhaust-related, but without checking
it out could not confirm. Weren't you thinking of finding a competent
mechanic/technician in the Detroit Area a week ago for your daughter's
impending move? If you are, then might I suggest my local wrench. His name
is Phil LaCasse and he works at a place called Auto Europe in Birmingham,
Michigan. Tel: (248)645-6300. He is the most competent Audi tech I know, and
I used to work at one of the dealerships he did. He also owns an "87? 5kt"
-Ingo Rautenberg
90 V8Q 172k+