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Thats your auxillary water pump, it aids in water (archive)
[ Follow Ups ] [ 7-series (E32) Message Board ] [ Msg. Board FAQ ]
Posted by Rainman on October 14, 2001 at 11:11:05:

In Reply to: Noisy Motor w/ coolant hoses; what is it????? posted by Winton 94 740iL on October 14, 2001 at 11:06:13:

circulation to the heater core at low speed and periods of extended idling so you don't run out of heat.

I have this noisy motor under a plastic cover next to the radiator overflow box. It has coolant hoses attached to it that look like heater hoses. It has started to whine on and off. Is this the viscous fan I have heard about? Any help would be appreciated.




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