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912 oil system air leak?

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Guy Buchanan

Joined: 16 Jul 2006
Posts: 1204
Location: Ramona, CA

Posted: Thu Jan 19, 2017 10:11 am Post subject: 912 oil system air leak?

Couldn't find an answer for this. I recently had my oil pressure       peg in flight. My oil pressure sensor is VDO and remote driving a       GRT 2000 EIS. I vaguely remembered that air in the line could       cause this so I bled the sensor feed line and the pressure       returned to normal. (It seemed like there was air in the line when       I bled it.) Then it climbed again, but did not peg. I bled it       again and it returned to normal. Questions:            Does this sound like normal behavior for the gauge? Would air         in the line cause it to peg?       
I recently did an oil change so I'm hoping the air came from         that. However, is it reasonable that I would be getting air some         hours after the change, and not right after?       
My Kitfox has the oil cooler on the suction side of the oil         system, between the tank and engine. Is it likely or possible I         have a crack somewhere in that system that's drawing air? And if         I did, would it be reasonable that said crack would never leak         oil, since I have no visible oil leaks?          

Thanks,     

Guy Buchanan

       Ramona, CA

       Kitfox IV-1200 / 912-S / Warp 3cs / 800 hrs

       Glider pilot, too

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Roger Lee

Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.

Posted: Thu Jan 19, 2017 5:02 pm Post subject: Re: 912 oil system air leak?

Hi Guy,



This doesn't sound like air. it looks to be more sender caused. It could also be a bad ground not making good contact. These two items are the most common causes.

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Tucson, Az.
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Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056

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