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Stock Coolant?

in General Tech Discussion 9 years ago
I purchased a flying RV-12 from an estate. The coolant is a straw/amber color and can be seen in many photos of newly installed engines. Can someone identify the exact brand/spec of this product? I am frequently told to use Dexcool, but that is not what is there now and I do not want to cross contaminate fluids nor drain system yet. Thanks for your assistance.

  • Re: Stock Coolant?

    by » 9 years ago

    Sounds like it could be Evans waterless coolant, which you certainly don't want to contaminate with water.
    Thank you said by: steven klein
      
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  • Re: Stock Coolant?

    by » 9 years ago

    Sounds like Evans to me too. Don't use any water in this if you keep it and Rotax doesn't recommend it any more. Personally I would just drain it at a low point. Blow HARD down through the expansion tank on top
    4-5 times and the system will be evacuated. Then refill with some DexColol 50/50.

    Blowing down through the expansion tank isn't very scientific, but it works. B)

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

    Thank you said by: steven klein
      
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  • Re: Stock Coolant?

    by » 9 years ago

    I had heard about Evans and did a test with a sample of the coolant. When mixed with water it mixed without any thickening or clumping. It appears to be a water based coolant, but still unidentifiable.

    Thanks for your input. I may just do a drain and refill with Dex at 200 hours.
      
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