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Old 01-09-2003, 05:08 PM
BAVBMW BAVBMW is offline
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Join Date: Dec 2002
Location: Visalia, CA
Posts: 379
If you're talking about the engine driven main fan and the respective bearing..... the viscous coupling will/can/should keep the fan itself from spinning too fast, BUT the pulley and bearing hub are still driven by the belt and will continue to turn at engine speed. With a mechanics stethascope (or long solid rod ie; extension ) you should be able to listen to all bearings and track down the noise, just beware of moving parts!!! Hope this helps and good luck!!
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