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When I fill my 62 Galaxie's gas tank all the way I smell gas fumes for the first 1/4 of a tank when I drive it. The last 3/4 of a tank there are no fumes. I cant find a leek, any ideas???
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Daze wrote:
"............, any ideas???
not to be a smart a*s, but my hillbilly side just says, "don't fill up the tank over 3/4 . My mechanic side says your filler hose / tube is not airtight. Replace it and your issue will just be a sweet smelling memory.
Z.
'65 K code Mustang
'66 352 Galaxie
Last edited by zray (July 28, 2013 8:20 am)
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not to be a smart a*s, but my hillbilly side just says, "don't fill up the tank over 3/4 . My mechanic side says your filler hose / tube is not airtight. Replace it and your issue will just be a sweet smelling memory.
That is a good idea, at least until I figure out the issue. As to the filler neck the 61-64 is a one piece tank. In other words the filler neck is part of the tank and there is nothing to replace... unless I replace the entire tank 
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Try replacing the seal for the sender and the gas cap.
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not to be a smart a*s, but my hillbilly side just says, "don't fill up the tank over 3/4 . My mechanic side says your filler hose / tube is not airtight. Replace it and your issue will just be a sweet smelling memory.
That is a good idea, at least until I figure out the issue. As to the filler neck the 61-64 is a one piece tank. In other words the filler neck is part of the tank and there is nothing to replace... unless I replace the entire tank
if you have fumes only when the tank is full it certainly cannot be the sending unit, it's seal, or the fuel fittings as they are on the bottom. You are left only with the possibiitiies of filler cap not sealing or pinholes in the filler neck / upper tank area, and as you said, to fix that the whole tank would have to be replaced. It's likely rusty anyway, no great loss to junk it.
Z.
Last edited by zray (July 31, 2013 3:22 pm)
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If it's like a '61 tank (Let me know if it isn't because I'm really not sure), directly below the trunk floor, I bet the top of it is leaking a little.
You don't see it because there's an insulating pad between it and the floor to stop vibrations, and that soaks up the small amount of leakage. Problem is, that pad also seems to hold road moisture, and, over the years, it will put pinholes in the top of the tank.
An Eastwood tank sealing kit takes care of the problem if the pin holes aren't much bigger than 1/8" or so, and you can paint the top of the tank with a good quality primer/paint (or just undercoat) to keep it from happening again for awhile. You can also kind of spray the edges of the pad with some rubberized undercoating to keep moisture thrown up from the road from soaking it (If you're reusing the pad, of course).
I've used Master Series silver primer (Moisture curing urethane) for a few projects, swear by it, and have read that you can use it as a gas tank sealer, but I've never used for that - yet. It does do a great job of encapsulating rust, though, so maybe you might want to try it. I've had better success with Master Series than with POR-15.
Last edited by Glenn M. (August 11, 2013 10:05 pm)
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