Question about 1999 BMW 318 ti

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Bmw 1998 318ti auomatic

Car overheats during back to back traffic, when turning a./c. on temperatue goes back to normal.

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  • luismorgner Jan 12, 2009

    I run the car until the temp.gage passed the normal temp it went over, the fan did not run until the a.c. was turn on.

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Verify the engine cooling fan runs at idle without the AC on, it should come on around just past 1/2 scale on the temp guage, do not let it overheat! these engines have aluminum cylinder heads and u can blow the head gasket out, let me know the results

Posted on Jan 11, 2009

  • yadayada
    yadayada Jan 12, 2009

    is the AC fan seperate from the engine cooling fan? if so test the motor by jumping from the battery to the connector of the fan motor, if it doesn't run replace the fan motor, if it does you may have a bad fan switch on the engine or defective fan controller relay.

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