Leak Testing Fuel Tank

Tom Bond · Sep 28, 2012

What's the best method to leak test a fuel tank? Didn't want the weld shop to do it. Just had them repair the broken mounting rail. 99% sure it won't leak as it's in good condition but just want to check all the seams and fittings and one previously brazed repair before I got it. I can plug the bottom fittings but don't really want to put in 17 gals. of gas quite yet.

JMOR · Sep 28, 2012

(quoted from post at 15:19:43 09/28/12) What's the best method to leak test a fuel tank? Didn't want the weld shop to do it. Just had them repair the broken mounting rail. 99% sure it won't leak as it's in good condition but just want to check all the seams and fittings and one previously brazed repair before I got it. I can plug the bottom fittings but don't really want to put in 17 gals. of gas quite yet.

f you don't put gas in it,I can't see much you can do other than see if it will hold air pressure, perhaps submerged to watch for air bubbles, BUT you better keep pressure real low, most tanks can't stand much at all.

J Strickland · Sep 29, 2012

Have tank sitting high enough to see all the way around it, fill with water check for leaks overnight. Remove plug or turn over upside down to drain water. Replug, add a gallon of gas slosh around (gas floats on water). Drain into can, let sit and air dry over a day. And install if no leaks.

James

Leak Testing Fuel Tank

Tom Bond

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JMOR

Well-known Member

J Strickland

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