Quote:
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Originally Posted by mad1
I think your fan clutch needs replacing. Try this - when the car is running, try to stop the fan with your hand - BE VERY CAREFUL. Basically, if you are able to stop the fan with your hand, the clutch isn't doing its job. The way my mechanic put it was "I shouldn't be able to do this, the fan should take my hand off". Obviously the car should be nice and hot - 100 C or so for this test to be valid. Again, be careful and do this at your own risk.
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STOP, DANGER...
That is NOT a safe way to test the fan clutch...
* If there are sharp edges on the blade, it will slice you open.
* If there are serious cracks in the blade, it can shatter and slice you.
* If the clutch is seized to the shaft, it will not stop...
Use compressed air or a garden hose, spraying against the fan rotation.
The attached drawing should make the procedure clear.
Have a great day.
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Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
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Fleet Durability
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1985 300SD
1983 300D
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