Question about 1985 Mercedes-Benz 300
Auxilary fan doesn't work....causes car to run hotter than normal & overheat when using A/C...any ideas on how I can repair this?
Hi,maybe the motor,if not check the following;
Posted on Feb 22, 2009
UNPLUG MOTOR & RUN 12 VOLTS DIRECT FROM BATTERY TO SEE IF FAN MOTOR IS GOOD NORMALLY MOTOR IS BURNT UP IN MY EXPERIENCE
Posted on Feb 19, 2009
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Overheating can be extremely bad for a car. Back in the days of carburetors, when engines were made of steel, overheating was much more common, and less damaging. But the modern engine has far less tolerance, with its aluminum blocks and, often, aluminum heads.
Many head gaskets have been blown out by overheat issues. Many heads have been cracked. These are not cheap repairs. Therefore, be vigilant and watch that heat gauge (thermometer). If your car starts to overheat, pull to the side of the road, and let it idle (do not give it a fast idle - that only worked in the days before electric fans) and, if that does not seem to be working, shut it off.
Bohdan Bodnar wrote: "The 2.2/2.5 liter cooling systems *MUST* be purged of air before operation; otherwise, coolant flow blockage will result (i.e., hot, possibly REALLY hot, engine). Partial purging will cause the engine to run hotter than normal; the temperature will gradually drop to normal as the system purges itself over several days/weeks."
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