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Hi, recently oil seepage was observed between the interface of the main oil pump housing and the crankcase after engine shutdown. The oil seepage is not significant, just sweating. All the Orings of the oil pump housing have been replaced but the oil seepage still persists. Anyone has any thoughts about it? Thanks.

  • Re: Oil Seepage

    by » one month ago


    Many times people think it’s the oil pump, but actually it’s coming from the bottom of the gearbox. Clean the area good then keep a watch on it. If it’s the gearbox then you’ll have oil up to it’s base. If it’s the oil pump the oil will be lower. If it is the pump then replace the “O” ring. It’s easy to do. 


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


    Thank you said by: Garrett Wysocki

  • Re: Oil Seepage

    by » one month ago


    Trapped oil in the oil pump cavity is most common. 

    Sometimes when you remove the oil pump (to change o-rings), oil gets caught in the oil pump cavity and it will seep out over time until all the trapped oil in the cavity is gone. You also could have a pinched or sliced o-ring in the oil pump OR you could have a leak coming from the gearbox as Roger said.

     

    30510_2_20210901_085825.jpg (You do not have access to download this file.)

    Thank you said by: Garrett Wysocki

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