How can I tell the fan clutch is bad for Benz C220 1996


Asked by Oct 17, 2017 at 07:24 PM about the Mercedes-Benz C-Class

Question type: Maintenance & Repair

I just replaced the water pump, and the thermostat for myBenz C220 1996,
and I am not sure if the fan clutch needs replacing too. After I put the new
water pump  , it stopped over heating, but with yesterdays hot weather (over
90F), it overheated. There is no leaks whatsoever, and I flushed the radiator as
well and replaced the coolant fluid. I have a strong feeling the fan clutch is
malfunctioning, though it turns with the engine is on but if I put a card board in
the fan blades while the engine is running, the fan stops completely. Does this
mean the fan clutch is bad? Please help

1 Answer


With the engine cold, can you spin the clutch? It should only move around half a turn. Free enough to move but not keep spinning. If it is very hard to turn or spins freely, then replace. I had a few that locked up on my over the years. Over 100K is when you might want to just replace for preventative maintenance.

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