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Thread: Radiator fan question

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  1. #1
    6,000 rpm - mere mortals would shift Demon I Am's Avatar
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    Radiator fan question

    So my friend realized today that his stock red fans in his 05 MSM are shot. Car has a new radiator and thermostat. What is the go-to upgrade from the stock fans? In one of my previous cars, I had a slim fan setup that came with a radiator shroud, to assist with pulling air through the fins. I have no scientific evidence to show that it worked as advertised, other than the car never overheated.

  2. #2
    Ninja Messiah kung fu jesus's Avatar
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    Stock fans are fine. I never had to upgrade with all the tracking I did in any of my cars. A more efficient radiator, proper ducting, and a reroute are better solutions for the money.

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    Paul B (05-23-2018),Slampen (05-23-2018)

  4. #3
    6,000 rpm - mere mortals would shift Demon I Am's Avatar
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    That's what I figured as well.

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  6. #4
    4,000 rpm - entering the fun zone Paul B's Avatar
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    On this topic, which fan is run by the ac? The passenger side fan or driver?

    I recently went to Mishimoto slim fans and ac delete. Would like to wire the two fans together to be run off thermoswitch.


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    Ninja Messiah kung fu jesus's Avatar
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    Radiator fan question

    Looking from the front of the car the fan on the left is the AC fan.

    It takes a simple jumper connection to wire them both to trigger off the OE thermoswitch.

    My NA was wired like this. With a coolant reroute and larger Koyo radiator, it took a long time for the fans to kick on at idle. I haven’t done it to my NB, but with the CSF aluminum unit I added (no reroute yet), it takes a long time as well.

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  9. #6
    4,000 rpm - entering the fun zone Paul B's Avatar
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    Quote Originally Posted by kung fu jesus View Post
    Looking from the front of the car the fan on the left is the AC fan.

    It takes a simple jumper connection to wire them both to trigger off the OE thermoswitch.

    My NA was wired like this. With a coolant reroute and larger Koyo radiator, it took a long time for the fans to kick on at idle. I haven’t done it to my NB, but with the CSF aluminum unit I added (no reroute yet), it takes a long time as well.
    Ok thanks for the clear answer. Gonna be wiring them together soon. Yea with my mishimoto radiator i haven't noticed the fan turn on at all.


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