Subject: gas tank neck leak?
Author: Prusnek
Date: Jul 7, 2004, 5:58 AM
Post ID: 1717112563
Ron:
The guy who does my painting (mostly antique bikes) always applies a
thin strip of POR 15 around the outside of the filler neck/tank seam
with a striping brush prior to painting, then over the seam where the
metal and paint meet on the filler neck when he's done. Usually the cap
covers this. Sealing the inside while you're at it wouldn't be a bad
idea either. Are you absolutely sure it's not creeping over the top and
down the side of the neck under the paint?
If you're gonna have the tank redone anyway, you might inspect the
filler neck before it's cleaned up and try to determine how it was
attached in the first place. Might be brazed, the rest of the tank is
welded if I'm not mistaken. I doubt if it's held together by a sealer.
Poke at it with a pick or something, be a detective and try to
understand the cause of the failure.
I had the same problem with a 1940 Indian tank, the filler neck (and
the rest of the tank) was soldered together, which might be an
acceptable fix depending on how well you're able to clean out the seam.
Let us know what you find out.
John Prusnek
.http://myweb.core.com/photos/spajohn@raex.com/MotoGuzziDecals
| loopers, I did a resto on an Eldo last summer, including a custom paint job. Painter has many years experience at the best auto body shop in town, does his side work using the paint booth & equipment at the shop. Best PPG paints. Nothing second class, did a beautiful job. Problem is that paint is bubbling around filler neck on top of gas tank. At the VA rally, one person who saw it said that there is a seam where the filler neck is fitted into the tank top, & that "aggressive paint prep" can remove the "sealer" from seam, allowing vapor from inside tank up under paint, causing it to lift & bubble. Can anyone verify? is so, what is the sealer? I'm going to get the tank made right, (paint job is guaranteed), but I want to be sure it doesn't happen again. Thanks, Ron Komoroski |