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  1. #21
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    Member No: 64997 kristofergregoire is an unknown quantity at this point kristofergregoire's Avatar
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    Yes | No

    Read some posts. Opinions are 50/50 on whether...

    to do that mod or not. I myself would be concerned but I'm also not an expert on how the whole sha-bang works anyway...


  2. #22
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    Yes | No

    Do the new models use an engine-driven fan?

    Looking on realoem.com it doesn't appear that the 335i uses one...

  3. #23
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    Yes | No

    guess not. but for me if i can't explain why it...

    doesn't need one but still came with one, I ain't touch'n it!

  4. #24
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    Yes | No

    Fair enough, but...

    The cooling system is not complicated so failure modes are easy to understand. Without the engine-driven fan there is a single point of failure in the electric fan. However, the car doesn't have redundant radiators, waterpumps, or thermostats either.

    There is a legitimate concern that the electric fan won't have enough capacity to cool the engine in extreme conditions (e.g. stop and go traffic, summer heat, AC on). That's why the lower temp fan switch and thermostat are installed. I also used some Water Wetter to be extra safe. In my experience, monitoring the coolant temp with a ScanGaugeII, the system has more than enough cooling w/o the engine-driven fan.

  5. #25
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    Yes | No

    yes the newer models do use engine driven fan but.

    it depends on the transmission type.

    manual transmission = electric fan
    automatic transmission = engine driven fan.


    Rick Kim member of CRS Club
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