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1994 Mercedes-Benz 300 Series Base 4dr Sedan 3.2L Auto

1994 Mercedes-Benz 300 Series
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September 4, 2010, 7:53 pm

AutomotiveForums M

Question: What is causing it to get hot?

Replaced radiator, thermostat, fan clutch. Still temp goes up to nine or above. Does not blow out any water. No bubbles in coolant resavour. If you turn the heater on and the fan the temp comes down. Shop checked to see if head gasket going out, said not from what they can see.

September 7, 2010, 6:30 pm

Richard W
Expert Mechanic

I would chck the sending unit for the temp gauge. You can just buy a new temp sender for the gauge. Or go get a after market gauge and install it. Then check the temp. There is one thing that is not very commend but if the water pump fins brake or the fins are slipping on the shaft it would over heat. But i would start with the gayge first.

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