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In message <c=US%a=_%p=CHARTER%l=FREEDOM-960812121636Z-68@freedom.charter.com> "Duff, Ian" writes:

> Try either the sender or the gauge ground.

> >it reads 0 but every once in a while it will move just a little bit, I 
> >know she is running hotter than that, but how hot that is the question?

On the 10v ur-qs, the sender is mounted in a part of the system that is not 
self-venting.  If the system loses water (small radiator hole?) the gauge can 
end up dry and only washed with coolant on bends.  The main symptom is erratic 
and rapid movements of the water temperature gauge.

Offhand, I don't know if the 90 20v needs bleeding like the ur-q does, but I 
know that once Audi invent a baffling idiosyncracy they like to hang on to it.

 Phil Payne
 Committee Member, UK Audi [ur-]quattro Owners Club