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Re: Auxillary Fan questions and overheating M3 at (archive)

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Posted by tim ng on February 28, 2001 at 23:49:48:

In Reply to: Auxillary Fan questions and overheating M3 at idle posted by Oliver30 on February 28, 2001 at 23:03:15:

rookie question, e30 M3s are famous for ripping out the aux. fan sensor on the themostat housing, repair the wires with extra length and the fan will work. You may want to upgrade to a 318ti temp. sensor which will turn your fan on earlier. Anyway, you should not have the temp. going pass 3/4 if you have a healthy cooling system even without the emergency fan since the thermostate will completely open and circulate enough coolant thru. You may want to look @ the radiaotr or thermostat and see if they are functioning properly.
Tim Ng
91 M3
88 M3
My temperature gauge will go past the 3/4 mark and even further if I let the e30 M3 idle for a long period. I have read that the auxillary fan is suppose to start up at some point (3/4 level). Is this true? Also, just to make sure, the auxillary fan is the fan in front (not behind) the radiator? If the auxillary fan does not come on when temperature gets to a certain level but works when AC is put on, where would the problem be? If it is the auxillary fan relay then where is that located? I have checked the fuses and they are all working. If the auxillary relay is the small box attached to the cover for the auxillary fan then do you have to splice wires when you replace it?

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