Topica Loopframe_Guzzi Archive


Subject: Tank advice needed

Author: Prusnek

Date: Nov 10, 2004, 5:28 AM

Post ID: 1717858901



Ian:
Bob's idea goes along with the way we repair old soldered together
Indian gas tanks. After disassembly (they come apart) and cleaning,
holes are patched by using a very fine mesh brass screen that is cut
and formed to the correct size then soldered to the inside of the tank.
This allows the solder to be built up to a uniform thickness to the
point where you can just barely see the screen.
In your case, you'd be doing it on the outside, and the critical part
would be to assess exactly how far the rust had spread, which would
probably involve sandblasting, or at least a good wire wheeling in the
affected area. As Matt says, if it's that rusty in one area, you should
expect to find other rusted areas, it might be totaled. Rust never sleeps.

John Prusnek

 Robert Hawkes wrote:

Matt and Ian, I repaired a gas tank once and, briefly, here's what I did.
Sorry if you know this. I filled the gas tank with water, stopped up the
gas hole, turned it up side down and enlarged the hole in the bottom. I
shined up the metal and then put on a shiny metal patch. Then I fluxed the
hell out of all the shiny metal areas and then with a small flame on my
torch I used regular solder to make a solder sandwich metal patch. Holds
like hell. Bob

-----Original Message-----
From: Matt Moore [mailto:moor-@hotmail.com]
Sent: Tuesday, November 09, 2004 5:52 AM
To: Loopfram-@topica.com
Subject: Re: Tank advice needed


Ian,
I concur with John. I had the bung (the little threaded thing that sticks
out of the bottom of the tank, which is welded in) break when I was
installing a new petcock. I had just treated the tank with POR 15, and it
had been pretty crusty on the inside. The rust (and probably the acid wash
too) had weakened the area around the bung and it separated. I had to get
another tank. I have been thinking about repairing the tank, but with the
POR15 stuff inside, I am afraid to weld to due to the fumes that it could
give off, or fire.

If yours has not been treated on the inside, you might be able to repair it.
But if it is weak enough to bend there, maybe there are other weak spots
(sorry to be pessimistic) . Somewhere I remember seeing a repair kit for
something like this (or for drain plugs? not for MG, for cars).

Good Luck!

Matt in MI

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