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Old 04-12-2017, 10:56 AM
Ted Christopher Ted Christopher is offline
Join Date: May 2016
Location: Braham, MN
Posts: 21
Default Sealing Fuel Tank Leak

The fuel tank is leaking on my RV12, not at the fittings so I assume I have a leak along one of the seams behind the tank, this only shows up when I leave the plane more than half full which I rarely do.

Can anyone recommend a short-term fix for this while I wait for a replacement tank? Would foil heating system tape work to seal a gas leak?

Last edited by Ted Christopher : 04-12-2017 at 11:01 AM.
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Old 04-12-2017, 11:22 AM
RFSchaller RFSchaller is offline
Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 2,186

I'd stop by Auto Zone and see what sealing options they have.
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Old 04-12-2017, 05:09 PM
deene deene is offline
Join Date: Jan 2005
Posts: 366

Empty tank. Clean the external leak point with scotchbrite and acetone. Put proseal all over the leak area. Leak fixed...
Deene Ogden.
N399AD RV-12...flying
N299AD RV8 QB, IO-390X, BA prop...SOLD
N199AD One Design...SOLD
N99AD BD4, flew for 22 years...SOLD
EAA Tech Counselor/Flight Advisor
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Old 04-12-2017, 09:01 PM
DaveWelch DaveWelch is offline
Join Date: Mar 2005
Location: Huntsville, AL
Posts: 299
Default Check the Front

I had a similar experience, only leaked when full. Only spotted the leak when I pulled the passenger seat forward and stuck my head in front of the tank. Leak was hiding behind the "cross member" near the top of the front plate that mounts the fuel gauge sending unit. Couldn't see it when standing beside the plane or kneeling on the wing.

Since the leak was around a screw (not the plate perimeter) I just drained the tank, removed all the screws, cleaned up a bit. I dipped the screws in Proseal and reinstalled making sure that there was enough proseal "overage" to squeeze out from under each screw head. No more leaks.

Hope you're as fortunate and do not need to remove your tank.

RV12 N951DZ
First Flight 9/23/16!
No paint yet. Working on a scheme with John Deere colors or accents.
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