radiator cap

Category: General Tech Discussion 4 years ago
Hi,
my Rans S6 with a 912 UL has a .9bar cap fitted, I want to replace it but can only get the 1.2 bar cap will this be OK.
Why do they fit different caps to certain engines?
Tanks Andy
  • Re: radiator cap

    by » 4 years ago


    The .9 bar (13 psi) was an earlier cap. They are all 1.2 bar (17.4 psi) bar now so you are good to go with that one. 18 psi coolant caps are fairly standard in many engines nowadays.

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-574-1080 Home (TRY HOME FIRST)
    520-349-7056 Cell

    Thank you said by: 姓, xìng wang

  • Re: radiator cap

    by » 5 weeks ago


    hi,

    i have 914 HOMEBUILT Aircraft.

    on 50/50 DEX COOLANT, i have run the Engine i.e SUFFIX01, the COOLANT become boiled at 115C. IT filled the expansion bottle at 115% THROTTLE. i was worried.

    should i go for FLYING? whereas ambient TEMPERATURE was 39C during Ground run.

    what to do?


  • Re: radiator cap

    by » 5 weeks ago


    If you boiled at 115°C, your radiator cap vented at 0.7 Bar instead of 1.2 Bar. 

    1.2 Bar does not boil until 124°C.


    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    whertzel1@yahoo.com
    Clicking the "Thank You" is appreciated by all.

  • Re: radiator cap

    by » 5 weeks ago


    If you boiled at 115°C, your radiator cap vented at 0.7 Bar instead of 1.2 Bar. 

    1.2 Bar does not boil until 124°C.


    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    whertzel1@yahoo.com
    Clicking the "Thank You" is appreciated by all.

    Thank you said by: 姓, xìng wang

  • Re: radiator cap

    by » 4 weeks ago


    what you suggest for keep me out of boiled? either changed pressure cap? or else.   or any other suggestion?


You do not have permissions to reply to this topic.