remove sending unit from my 1954 chevy 3100 looked in a little varnish NO rust are those tanks galvanize out side looks great but while in out would like to clean it used to clean motor cycle tanks with white vinegar but that was mainly for rust. no rust at all but varnish any great ideals THANK YOU IN ADVANCE !!!!!!!
Gas tanks are typically made of terne plated steel, which is basically lead coating. If you don't have any rust, a good strong solvent will remove the varnish. Something like lacquer thinner or acetone. Be careful about vapors, etc. The stuff is probably more flammable than gasoline.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
Yep, Fortunately the one radiator shop that could do that in Anchorage is still open, but the plating shop closed years ago.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
If no rust or sediment, why go to the trouble of cleaning it? If the OP means he looked in and very old gas was in the bottom and turned to varnish, just pull it, put in a bit of fresh gas, let it set a while then slosh it a bit and dump.
That varnish will need a stronger solvent than gasoline to remove it. Lacquer thinner or acetone would work, or a strong solution of Trisodium Phosphate in HOT water (concrete cleaner) would be another option. I've cleaned gas tanks by putting a couple of shovels of pea gravel into them, and strapping the tank to a rear wheel of my tractor. A couple of hours of bush-hogging weeds in a pasture does a really good job of cleaning. Jerry
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Cleaned my 46 under the seat tank as good as I could to get all loose rust out Poured a quart of red coat sealer let it dry Several days (probably longer ) before I got back to it Worked great also permetex fuel tank repair worked great For me on small leaks and resealed around Where gas plug area was cracked on 55 Chevy car