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V8 main radiator fan check
Eliot (and other V8 owners),
Could you please do a test for me? Our V8 is having overheating problems
when it is sitting at idle. I think it is caused by a bad viscous coupling
between the shaft coming from the engine and the main radiator fan. I
tested this coupling by holding the fan blade stationary with a screwdriver,
then having my wife start the car. I could hold the fan from rotating
without any real resistance. I don't think this is normal. The car is
overheating while stationary and idling probably because the fan is turning
but not drawing much air. If you could do a similar test, I'd appreciate
it, as the viscous coupling is $140 from Linda (the cheapest I could find --
no used part was available, but probably not worth buying used anyway).
Thanks in advance.
P.S. The car runs very cool when it's moving, even at moderately slow
speeds, so I don't think it's the radiator.
Audi Quattro Fanatic