Question about 2002 Jeep Grand Cherokee
It may be the radiator fan making all that racket. Usually when the engine is cold, the thermal fan clutch allows more "slip" --- this allows the fan to turn slower than the water pump pulley (less load on the engine). When the fan clutch detects more engine heat, it reduces slippage of the fan clutch and this results in the fan turning "faster". It's actually turning at the same speed as the water pump pulley. The "roaring" noise is the result of the fan pulling in more air through the radiator.
If the noise is present at all times, whether or not the engine is hot or cold, then the fan clutch might be malfunctioning.
I hope this helps.
Have a nice day !!!
Posted on Apr 09, 2011
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Posted on Jan 02, 2017
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