Posted by Stephen Newell on September 06, 2012 at 05:16:42 from (188.8.131.52):
In Reply to: Gas Tank Repair posted by MCOHIO on September 05, 2012 at 14:08:20:
I've repaired many gas tanks. The last one I had to cut the entire bottom of the gas tank out and replace it with new metal. I haven't had much luck with epoxy products. I thoroughly wash out the inside of a gas tank with muriatic acid, neutralize it with vinegar and dry it before I work on it at all. It works good to dry it by sitting the tank out in the direct sun with a air hose at 5 psi run inside of it for 2-3 hours. Now with any openings the tank may have open I run a flaming rag on a 10'-12' stick over the tank to make sure there is no fumes left. Occasionally it will ignite but with the tank open it just burns instead of explodes. After getting rid of the fumes if there is a large hole I weld a patch over the hole with a wire feed welder with the amperage turned down as low as I can. Then I use a angle grinder and smooth it out. There will be pin holes left so I solder what is left with silver filled solder. Plumbing solder doesn't stick very good. I would braze it but I had the equipment. Last I would coat the inside of the tank with a gas tank sealant. I use Red-Kote. I would even recommend using this on a new gas tank if you are going to keep the vehicle for any length of time. It will prevent condensation from rusting out the bottom of the tank.
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