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Engine? noise in Audi 80
In message <c=US%a=_%p=CHARTER%l=FREEDOM-960911032238Zemail@example.com> "Duff, Ian" writes:
> Conventional wisdom on the list is that the valve noise you describe can
> be solved by switching to a *good* synthetic motor oil, such as Mobil 1
> or Red Line. Problem is immediately after starting, oil pressure builds
> slowly enough that hydraulic lifters don't get a full load of oil right
> away. Dino oil eventually gets fluid enough and pressurized enough to
> make it to the lifters, and the noise stops. Synth oil flows better
> cold, so the noise stops sooner. HTH.
I don't think that's Mauricio's problem - it wouldn't be there after the gas
pedal were "suddenly" released. On some Audi 80s (the European carburettor
versions) the fuel pump is mechanical - it's bolted onto the side of the engine
and driven from the camshaft. These often develop a valve-like tick. The
solution is replacement, though the problem can often be eased by loosening the
Allen screws that hold it and pushing it down a little before re-tightening.
There isn't a gasket as such - an "O" ring pushed into a funny shape is used.
36k is a bit early. I had one go at 57k once.
> >I have an Audi 80, 1992 with just over 36K and, to my surprise and
> >disappointment, the engine? started to make a noise that is similar to
> >strong valve noise. This clicking sound is more audible when the
> >is cool, is not always related to the engine RPM, and is more notorious
> >after the gas pedal is suddenly released.
Committee Member, UK Audi [ur-]quattro Owners Club