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Rotax 912UL coolant liquid

in 912 / 914 Technical Questions 8 years ago

  • Re: Rotax 912UL coolant liquid

    by » 6 years ago

    -I think because it has a higher viscosity, so it does not flow through the coolant galeries fast enough?
    The -01 heads have more gallery area, mostly around the exhaust port, maybe they are smaller diameter requiring a less viscous fluid?
    Thank you said by: Capt. Siva,
      
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  • Re: Rotax 912UL coolant liquid

    by » 6 years ago

    Evans carries with it a 20F - 30F temp penalty. Water adsorbs and releases heat far better and quicker.

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

    Thank you said by: Capt. Siva,
      
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  • Re: Rotax 912UL coolant liquid

    by » 6 years ago

    on 914 engine, -01 head, we have used EVANS, still found no problem on temperature or CHT.
    CAN WE CARRY ON ?
      
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  • Re: Rotax 912UL coolant liquid

    by » 6 years ago

    on 914 engine, -01 head, we have used EVANS, still found no problem on temperature or CHT.
    CAN WE CARRY ON ?


    Sure... if you want to IGNORE the engine manufacturer's explicit service instructions!

    "Waterless coolant is not permitted for engine types 912 i, 915 i Series or for 912/914 Series with cylinder head version Suffix - 01."

    Pretty sure they didn't go to the trouble of publishing this instruction for no good reason...
    Thank you said by: Rob Seaton, Bill Hertzel
      
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  • Re: Rotax 912UL coolant liquid

    by » 6 years ago

    Hi I am Sue and I'm new here, just got my Pilot's licence (whoooeee!) and bought a used but good Skyranger classic. In the past did a lot of motor racing (historic cars) and my own building/making/fixing/running ( helped by my husband) so have some understanding about mechanical things. Now I'm confused about all the
    recommendations on Rotax 912 coolants. Some say blue some say pink - and I read that ethylene glycol with
    50% water is good, and then propylene glycol undiluted is good or better .Then see that the name Dex-cool is used by all as an advertising ploy. I'm sure that coolant needs to be low silicate and a nitrate free formula. So I need that and pink and available in UK and its hard to be sure which complies. Any ideas?
      
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