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Dripping Coolant from water pump weep hole

in 912 / 914 Technical Questions 12 years ago
I live in a very cold climate. The ambient temperature has been around 10 below zero F the last couple of weeks. I put my airplane into storage this past October with no coolant leakage from the pump weep hole. Today I noticed a small puddle of coolant on the floor which was coming from the weep hole. Is it possible this is due to the cold temperatures, since I had absolutely no leakage when I put the engine into storage for the winter. I have a 912UL with 250 hours TT. 50/50 ethylene glycol mix. Thanks

  • Re: Dripping Coolant from water pump weep hole

    by » 12 years ago

    Hi Ronald,

    During temp changes you could see a small drip down under in that area and that can be normal, but it should be small, about the size of a quarter to a silver dollar on the floor. If we are talking a big puddle then no that isn't normal. If it is small I would wait until it warms before hitting the panic button.

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

      
    Report

  • Re: Dripping Coolant from water pump weep hole

    by » 12 years ago

    Thanks Roger. If I do end up hitting the panic button, are the special tools that are required for replacing the impeller and seals available for rent?
      
    Report

  • Re: Dripping Coolant from water pump weep hole

    by » 12 years ago

    Hi Ronald,

    I don't think you can rent the tools and if you have to replace a water pump seal it is a Heavy maint rated job and you should have special training.

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

      
    Report

  • Re: Dripping Coolant from water pump weep hole

    by » 12 years ago

    Hi,

    There is a bit of red powdery residue around the bore hole on my 912 UL and some more lower down. I am using 50%water mixex with 50% glycol. Would this be an early sign of a developing leakage? Is the changing of the seal(s) an engine out job or can the parts be removed easily to be sent to the workshop? I assume that the water pump housing needs to come off as well as the ignition housing.

    Thanks and regards,
    Harri
      
    Report

  • Re: Dripping Coolant from water pump weep hole

    by » 12 years ago

    Hi Harri,

    Is your coolant red? You can at times have a small weep out of the weep hole on the bottom of the pump. If it isn't bigger than an inch or so on the ground and it is intermittent then it may not be something to worry about. If you have a puddle on the floor then that's something else. If it were the water pump seal that needed to be replaced then yes everything has to come off and the water pump shaft has to be pressed out.

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

      
    Report
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