benzme I don't think my viscous clutch fan is working correctly.
I never hear it make any noise, the fan barely increases in speed when the engine is revved, and when I shut the engine off when it's hot the fan will spin for a few seconds.
After reading this and other threads, these all sound like symptoms of an inoperative viscous clutch.
I checked with a local benz workshop, to replace the fan clutch and check the cooling system for other problems, the clutch is $290 and they want $150 for labour.
This seems expensive for a small part.
What do you think?

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1989 W124 260E