The Stovebolt Site Forums The Shop Area Engine Shop Leaky Fuel Line

I replaced a section of fuel line with hard line and brass fittings, now I got a slow leak where the fitting connects to the Pitcock under the gas tank. I used teflon tape but still got a leak, any suggestions?

Flared fitting or sleeved? What kind of tubing, copper, aluminum?

Flares can be real easy to make a bit off center when using something soft, so one side of the flare may be thicker than the other leading to seepage. You could crank on it till it squishes out, but with brass fittings that's not an option.
Teflon wont fix it as you'd need to put a fair amount in the tip of the fitting where the flare contacts it, and that opens you up to getting excess teflon inside the lines. I've also had issues with the teflon just falling apart on contact with fuel.

In my experience with varios types of lines, it's usualy better just to lop off the flare, ream the inside a tad, file the end square, and try again. If you're using compression sleeves, pretty much the same advice. Now if you're using the good type that cut into the tube as the B-nut is tightened, those are one time use so you'd need a new sleeve as well.

Its such a minor leak, like a few drops a day. I sealed the back of the brass fitting with Permatex. Ill let you know if it holds. Thanks for the info..