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Hello:
I have a 912 engine. When it reaches 50 degrees, I turn off the engine. Is the sound normal when the oil tank pans? The sound of the oil tank is like the sound of oil return.

  • Re: Is the sound of the oil tank normal after the 912 engine is hot?

    by » 3 months ago


    When the engine is running, there is continuous Oil Tank "Burping" going on as combustion gasses leak past the Piston rings and pressurize the crankcase to a few PSI and return the Oil back to the Tank.  That's how it works.

    This will continue for a few seconds after the engine shuts down until the pressure equalizes.

    I suppose that if you were in a quiet location, you might be able to hear this happening.

    But generally, this happens on the ramp with the wind blowing, the Cowls On and the Oil tank capped off, and you are sitting in a closed cockpit with a headset on.

    You must have pretty darn-good hearing!!!


    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    Bill.Hertzel@Yahoo.com
    Clicking the "Thank You" is Always Appreciated.


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