My MB 190e is overheating and I came to the conclusion that it is the
fan clutch. I was able to get the OEM part for under 100 dollars where
the dealer wanted to charge me 300 not including labor to replace.
Should I get a mechanic to replace this or is it easy enough to do
myself? I am wary of mechanics since they wanted to charge me three
times what the item costs. Thanks in advance!
It orverheats after driving for a while. When it does it causes coolant
to overflow out. The fan comes on sometimes and my mechanic said it was
the fan clutch and wanted 300 for the part and 200 for labor.
Has the mechanic shown you what have been checked? I would suspect
sensors and wiring first before coming to clutch which is probably the
most time-consuming and expensive (and most profitable?) repair for the
The fan clutch should have a two-pin connector. Disconnect it and check
the resistence. If it fails, the circuit should be open. If you get
reading, most likely it is still good. You can double check by applying
12v on the pins. Positive on one and negative on the other. There is
no polarity. When voltage is applied, a good clutch will engage the fan
which no longer turns freely.
If the clutch turns out to be good, let me know and I will look at the
wiring diagram. I think it is directly connected to temp sensor. When
the sensor grounds (temp reaching predefined range), voltage is applied
to the clutch. However, I did this many years ago so I may remember it
wrong. You need to tell me the year and engine size for me to look at
the correct diagram.
BTW, if temp stays high even when car moves, the radiator is at fault.
The fan helps only at stationary or low speed.
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