Yes ;
Use the ingredient in nail polish remover , I'm having a serious brain fart and cannot remember what it's called but it begins with an "A' and is nasty stuff so do wear heavy gloves and be cautios when pouring it in and out .
Acetone maybe ? .
Add a gallon and some cheap stamped flat washers , close it up and shake the bejeebers out of it , allow to soak then chake it spome more , that old gas is really sticky and thinck , takes time to cut through it .
The cheap stamped flat washers have sharp edges to cut through the accumulated tar and gunk .
Once you have the tar out , use diluted phosphoric acid to wash it clean and eliminate any rust .
-Nate
Mark wrote :
Hello,
This list has centuries of experience, so I thought I'd check with you all first. Has anyone here any suggestions on cleaning the tar-like goo out of a gas (as in gasoline) tank that's been sitting for 2-3 decades? I'm resurrecting a car I've had for 20-years, and was probably sitting for at least 15-years before I bought it. It needed major engine repair, which is almost completed. I figured it would be a good idea to drop and drain the tank, for good measure. When I removed the fuel lines, only a dribble came out, so, I thought, "Well, it must be almost empty." Upon loosening it up, however, I found it to be quite heavy, with some sloshing around inside. After I poured off the liquid through the filler tube, there remains a layer of black tar, maybe 2-inches thick, stuck to the bottom of the tank. It's not a full solid, but it's pretty thick. Obviously, it has clogged the pick up and return ports. And ruined the guage sending unit.
Anyone ever come across the before? Any ideas? I've thought maybe dumping in 10 or so gallons of fresh fuel could dissolve it. Or, would some other chemical work better?
Mercedes content: It's a '59 190SL.
Thanks!
Mark
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Posted by: vwnate1@yahoo.com
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