Engine? noise in Audi 80

[quk@sievers.com (Phil Payne)]

In message <c=US%a=_%p=CHARTER%l=FREEDOM-960911032238Z-539@freedom.charter.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
> >a
> >strong valve noise.  This clicking sound is more audible when the
> >engine
> >is cool, is not always related to the engine RPM, and is more notorious
> >after the gas pedal is suddenly released.

--
 Phil Payne
 phil@sievers.com
 Committee Member, UK Audi [ur-]quattro Owners Club