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912ULS Overheating

in 912 / 914 Technical Questions 12 years ago

  • Re: 912ULS Overheating

    by » 12 years ago

    Hi Michael,

    The high coolant and CHT may be a result or symptom of another cause. What are the EGT's? If you have a lean situation with fuel it could cause the over heating.
    Also make sure there is no oil hose restriction. It could be a reduced radius on a hose, but not a full kink.

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

    Thank you said by: Michael Nault
      
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  • Re: 912ULS Overheating

    by » 12 years ago

    I don't know what my EGT is as I don't have a gauge but I'll get one and check. I'll also inspect the oil hoses for a restriction but wouldn't that affect the oil pressure?

    Thanks Roger. I'll let you know what I find out.
      
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  • Re: 912ULS Overheating

    by » 12 years ago

    Hi Michael

    Did you change the coolant to 50/50 after it started to overheat, and if so have you tried it since, and if so has anything changed.

    I know it is an obvious question, but......

    Also, what type of instruments are you using and what type of senders for the CHT and Water. Are they completely independent of each other or is there a common connection somewhere.

    Cheers Mark
      
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  • Re: 912ULS Overheating

    by » 12 years ago

    Would a vacuum leak at the carb crossover cause a lean condition? I just discovered that the plug on the vacuum port I used to connect my gauge when doing a carb synch was missing.
      
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  • Re: 912ULS Overheating

    by » 12 years ago

    Yes it would. Any air leak in this area will cause you problems. It would also have shown up on the EGT's

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

      
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