Requirement for a specific coolant

Discussion in 'Maintenance Bay' started by bluesideup, Dec 22, 2017.

  1. bluesideup

    bluesideup Pre-takeoff checklist

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    Hi everyone.
    There is requirement for a specific coolant in an CTLSi, BASF® Glysantin Protect Plus/G48. This is a waterless type. Very difficult / impossible to get in USA.

    Are any of you familiar with it and is a good idea to mix it with another type like the
    SHELL ® DEX-COOL, or just remove, clean with distilled and replace?
    Any recommendations?
     
  2. wilkersk

    wilkersk Line Up and Wait

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    That has the Rotax 912 engine, right? I believe Rotax recommends a DexCool type antifreeze. I wouldn't mix brands though, personally.

    http://www.rotax-owner.com/pdf/ROAN cooling.pdf

    Perhaps you can contact a Rotax shop in your area?
     
  3. azblackbird

    azblackbird Cleared for Takeoff

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    I always ran this stuff in all of my water cooled bikes. Should work just as well for the Rotax engines. Just don't ever mix water or antifreeze with it or you will ruin it. Once you go with the Evans product, you need to stay with it, or drain and flush your entire system if you ever go back to regular antifreeze.
     
  4. Capt. Geoffrey Thorpe

    Capt. Geoffrey Thorpe Final Approach PoA Supporter

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    The question is: does the CTLS installation run hot enough to require the waterless?

    I use DexCool in my ride, but it runs on the cooler end of the spectrum.
     
  5. bluesideup

    bluesideup Pre-takeoff checklist

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    Hi.
    Unfortunately FD is directly prohibiting that type.

    FD recommends the waterless type, but it's a very confusing recommendation, different, depending in what manual you look. The max temps are around 220-230, and mostly around 200. FD says waterless, but No Evans, Rotax seems OK with it?
    It may be best to flush out the german carp and use DexCool, but some of the A&Ps specifically recommend flushing it with distilled water before using other brands.
    My hope that one of the guys around here may have gone that road already.
    It would help to know exactly what they put in it at the factory, it looks like it's Blueish and looks like it is a mix of Water and G48.
     
    Last edited: Dec 22, 2017
  6. azblackbird

    azblackbird Cleared for Takeoff

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    Waterless coolant (Evans) is normally propylene glycol based. Regular antifreeze (DexCool) is usually ethylene glycol based. There's a huge difference in both as far as corrosion and thermal capabilities are concerned. I much prefer a waterless coolant in mission critical motors.
     
  7. Cap'n Jack

    Cap'n Jack Final Approach

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    I think you need to expand on your answer to make it more correct.
    For example, Prestone has a propylene glycol product which is mixed with water (1) for use, and is considered a "regular antifreeze"
    DexCool is also mixed with water, as you know. So in both cases, the antifreeze is really water-based, and the antifreeze prevents freezing in winter, and allows a somewhat higher boiling point than plain water.

    (1) http://midsouthsales.com/wp-content/uploads/2016/01/SDSAF555.pdf
     
  8. bluesideup

    bluesideup Pre-takeoff checklist

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    Hi,
    Here is a direct quote from FD manual:

    Warning:

    Flight Design advises against the use of Evans coolant. The advantages offered by this fluid are negated by sustained operational problems (e.g. moisture absorption). Based on the results of testing under various climatic conditions, it has been demonstrated that Evans is not necessary for the safe operation of the CTLS.
     
  9. azblackbird

    azblackbird Cleared for Takeoff

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    Which means you can probably use DexCool (or a variant) without any issues.
     
  10. Cap'n Jack

    Cap'n Jack Final Approach

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    So you could replace the Evans product with undiluted Prestone in mission critical engines? They would both be waterless, propylene glycol.
     
  11. Capt. Geoffrey Thorpe

    Capt. Geoffrey Thorpe Final Approach PoA Supporter

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    Cap'n Jack likes this.
  12. bluesideup

    bluesideup Pre-takeoff checklist

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    Hello everyone.
    Thank you for your remarks and feedback.
    Given all the input from A&Ps and other owners the conclusion is that the best thing to do, if you cannot get the same exact type of coolant to add to the proper level, is to Emty, drain all existing coolant, refill with distilled water bring to operating temps, drain and refill with an approved brand that is available in the good ol USA.
    Here are some notes, and types of coolant, approved for FD CTLSi:
    >>Warning:
    Anti-freeze from different manufacturers must not be mixed as they may
    react with each other and flocculate. If in doubt, the mixture should be
    completely drained off and replaced.<<
    >>Warning:
    Flight Design advises against the use of Evans coolant. The
    advantages offered by this fluid are negated by sustained operational
    problems (e.g. moisture absorption). Based on the results of testing under various climatic conditions, it has been demonstrated that Evans is not necessary for the safe operation of the CTLS.<<

    Coolant approved, just a summary. I never use anything Shell but they seem to be popular and available.

    CASTROL ® Antifreeze All-Climate
    CASTROL® Antifreeze Anti-Boil
    TEXACO ® Havoline Extended Life Antifreeze
    PETROL® Antifreeze Concentrate / Antifreeze G 11
    PRESTONE ® DEX-COOL extended life
    PRESTONE® 50/50 preluded DEX-COOL extended life
    SHELL® DEX-COOL
    SHELL ® Antifreeze Concentrate

    Merry Xmas and Happy New year to everyone.