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Wondering if anyone can help resolve an oil leak I've had for the last 6 months or so. After cleaning the engine and idling for a couple minutes, I took the attached photo. The oil leak *appears* to be coming from the top aft starboard engine attachment point. Reference the globule of oil working its way out of the attachment.

I've searched technical documents on the oil system but I don't quite understand why oil would emanate from this location. Does anyone have any ideas, or better, corrective measures I could try? So far I have only tightened the bolt to specified torque. Thanks!

 

Jon

Kitfox 5 912ULS...(the one from the pre-buy video!)

Engine S/N 4425336

 

8799_1_PXL_20210702_213905191.jpg (You do not have access to download this file.)
  • Re: 912ULS Oil Leak

    by » one month ago


    Oil leaks are tough to track down, could be leaking elsewhere and accumulated there.


  • Re: 912ULS Oil Leak

    by » one month ago


    Was the engine mounting bolt 'oiled' before being inserted at some point? Could a bolt that was too long have been used and it has damaged the crankcase? I would be tempted to remove the bolt and take a look inside the threaded hole.


  • Re: 912ULS Oil Leak

    by » one month ago


    Thanks Sam and Kevin! I pulled the mounting bolt and peeked inside. No red flags that I could see, but I did notice a 1mm air gap between the engine mount and the engine crankcase with the bolt removed. This is the long M10x110 that goes through the engine and threads into the other side (from what I've read). Maybe oil was splashing up on it from the inside and leaking out through the gap? Either way, I fit in a washer as a shim (5 in the attached photo) and the leak seems to have stopped!

     

    I washed the engine and after another quick run found a small leak at the magnetic plug, but after a re-torque there I seem to be completely leak free...at least for this week!

     

    Jon

    30493_2_Screenshot_20210829-221329.png (You do not have access to download this file.)

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