BenzWorld Junior Member
Date registered: Jul 2006
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Faulty Fan Cluth - How to tell?
Does anyone know with certainty how to tell if the viscous fan clutch is faulty? I have a 1995 C280 with 130k miles. I have heard several different views on this. Some say the fan should have a good bit of resistance when turned by hand and the engine is cold. Others say it does not begin to lock up until quite hot. I can keep mine from turning when the engine is started easily (not using my hand, BTW).
The temp continues to creep up in hot weather where it did not before. Water pump and thermo are new. Radiator clear and fins unobstructed. I use distilled water, Water Wetter, and the DIY Cool Harness mod. All of this has served me well until this summer. BTW, the aux fans are also new and kick in and out to specs. Any help on the fan clutch is appreciated.
Last edited by 95280GUY; 07-24-2008 at 02:46 PM.