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Coolant

in General Tech Discussion 13 years ago
I presently have the Evans waterless coolant in my 912 and am considering changing to a 50/50 glycol so that the engine will run cooler. Has anyone performed this conversion?

  • Re: Coolant

    by » 13 years ago

    Hi Greg,

    Drain the Evans and while the system is open at a low point blow hard down through the coolant tank on top of the engine. That will just about clear the entire system out. Cover the low point with a rag. It can be messy otherwise. Dump the coolant reservoir. Then fill it up with what ever coolant you are going to use. It simple. It's a little more involved going the other way, but going back to 50/50 is easy. No purging of the coolant like the oil. just fill it up.

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell

      
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  • Re: Coolant

    by » 13 years ago

    I have been told that it is not advisable to mix brands of anti freeze in the coolant water. Does anyone have any thoughts on this?
      
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  • Re: Coolant

    by » 13 years ago

    A few simple rules of thumb:
    You can not mix a Dex Cool anti freeze with a non compatible Dex Cool anti freeze. It could thicken where it is not usable. Noted on some anti freeze containers is printed Dex Cool compatible. Still don't mix, but if you had a little residual when swapping coolant it shouldn't be an issue and for those engines that use Dex Cool type coolants it should be okay to use that coolant..
    If you use Evans you only add or top of with Evans and absolutely no water as it is waterless.
    If you use some of the other anti freeze products technically some could be mixed without adverse effects, but it isn't advisable.
    You are always better served when using a 50/50 mix to always best top off with either distilled water or the same product that is in the cooling system. It doesn't matter if you use a standard time limited or extended life anti freeze because you should drain and refill every 2 years. It usually only takes approximately 2/3 gal.

    Draining and refilling a Rotax cooling system is fairly easy and just takes about 15-20 minutes. No one should be penny pinching about spending $12-$15 for a gallon of coolant every couple of years.

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell

    Thank you said by: Ralph iRMT Sneer
      
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