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radiator fan not spinning

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  • radiator fan not spinning

    Hi Guys, Im a new owner of a z3m coupe, love it and just trying to get ontop of it. I had it serviced yesterday so decided to go for a spin, in a bit of traffic and noticed water temp go past half way.... turned on heater full and brought temp to middle, was toasty in the cabin tho..

    Anyway the radiator fan does not spin, it will spin by hand but it has never spun, I wrongly assumed it would kick in when it was needed, not spin all the time. Anyone got any advice. I checked the top water hose which was hot so am hoping that the pump is ok.

    Where should I start to diagnose this? Could it be a fuse? as i say it does spin by hand i took a picture which i will attach. Many thanks Dave.

  • #2
    It’s a viscous fan Dave. Should spin at idle and will increase markedly when the temperature increases and the viscous coupling kicks in due to high temps. Sounds like the viscous coupling is faulty.
    1998 ///M Coupe

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    • #3
      Totaly aggree with the above

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      • #4
        many thanks

        Many thanks, will get on it :)

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