I noticed that at operating temperatures (85C) and 100 outside, with my engine off, I am able to spin my fan clutch about 1/4 turn max with a good shove. Is this normal or is it a sign that it needs replaced?

I don't have any overheating problems at all. I'm just curious if the clutch should be completely locked at this temp or is it normal to be able to move it a bit. I also did the mod on the pin, but don't know if/how that affects things when it's already at operating temperatures.

__________________
1993 400E, 256,000 miles (totaled)
1994 E420, 200,000+ miles
1995 E420, 201,000 miles

85C is not a warm enough coolant temp to lock it up.

Ought to begin to lock up around 95 to 100C. When it does, and you step on the throttle, it'll sound like a 747 taking off.

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

Thanks. I'll check it again when it's really hot.

__________________
1993 400E, 256,000 miles (totaled)
1994 E420, 200,000+ miles
1995 E420, 201,000 miles