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Coolant

in General Tech Discussion 7 years ago
Is there any reason not to use plain distilled water in a 912uls? I live in central Florida, freezing is not an issue.
I understand that you can dilute Dexcool, if so, how much? If lubrication is the issue , can additives be added to the distilled water? What is the cooling system capacity including the water cooler?
Thank You,
Ray Moran

  • Re: Coolant

    by » 7 years ago

    The Operators manual recommends staying around 50-50 mix.

    See also the Service Instruction SI-912-016

    "Conventional coolant (with about 50% water content) has a specific thermal capacity that is higher than waterless coolant. It gives excellent corrosion protection, especially for aluminum, and protection against freezing."

    Coolant system capacity is listed in the Line Maintenance Manual at approximately 1.5 liters (0.4 US Gallon)
    Thank you said by: Raymond Moran
      
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  • Re: Coolant

    by » 7 years ago

    PS: Here is the breakdown of the coolant capacity, taken from the 912 Installation Manual 75-00-00 page 24:
    912-coolant-capacity.png (You do not have access to download this file.)
    Thank you said by: Raymond Moran
      
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  • Re: Coolant

    by » 7 years ago

    Hi Raymond,

    Just using straight water is never recommended. Pure water lacks extremely important additives, plus water will boil at a much lower temp than a 50/50 mix. Pure water will allow the water to boil at a very low temp and when it does it will cause vapor spaces that will no longer cool. This is a good water to ruin your engine really fast. Worrying about freezing is only one aspect, but there are many others. You can buy regular Dex Cool 50/50 already to use at any auto store. There is no need to buy a concentrate and then mix it yourself. A gallon is about $15 and you'll only use about 3/4 gal.

    https://en.wikipedia.org/wiki/Antifreeze

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

    Thank you said by: Raymond Moran
      
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  • Re: Coolant

    by » 7 years ago

    Follow up question. How often do you have to change Dex Cool 50/50? How many hours or years will it last before it looses its anti-corrosion properties?
    Thank you said by: Raymond Moran
      
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  • Re: Coolant

    by » 7 years ago

    Hello, I think that is a question for Roger Lee. I would also like to know.
    Thanks
      
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