Posted by rhtx55 on July 29, 2012 at 12:42:37 from (207.119.47.83):
In Reply to: 400 gas tank split? posted by Evan From IA on July 29, 2012 at 07:42:26:
Muriatic acid would be my last resort, that stuff is very agressive, and make double sure you get it neutralized.
If the "gunk" is gasoline residue I would first try pouring in some carb cleaner or berryman's chemtool and let it soak a couple of days.
If it is rust residue I would use a gallon or two of vinegar, let it set for 24-48 hours, rinse & then fill with water & add cup or two of baking soda to neutralizethe acid residue left from the vinegar, I would let this soak overnight also.
I have had a tank on an H, and later an F20 I took to a local radiator shop, they split the tank at the seams, ran them through their tanks, they re-attached the baffles, fixed any holes or leaks, resealed, and pressure tested. I had them send them out to have dipped & re-galvanized.
I beleive it was around $175 ea back then. The H tank was leaking as the bottom had rusted through, the F20 tank was badly dented, and needed a new coupling welded into the bottom for the sediment bowl.
Any liquid such as evaporust etc. may give you good results, it might take quite a few applications, depending on how bad the rust is. There are many products such as POR-15 to reseal the inside once you get it clean, but follow directions carefully, I have seen tanks that had sheets of this stuff floating in them, probably due to a poor prep job initially.
This post was edited by rhtx55 at 12:56:23 07/29/12 2 times.
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