old gas tank sealer going soft and gummy

MI-Bill

Member
I have a JD B gas tank with old sealer that is going soft and plugging up the gas lines and carb. Is there a way to clean out or strip the sealer? I have not pulled the tank yet?
 
What brand of sealant did you use? I've never heard of sealant going bad. I don't think any solvent would touch it. The only thing I can think to even try is to heat the tank with a heat gun and burn the sealant loose. Of course you would have to thoroughly clean the gas out of the tank like you were going to weld on it first.
 
i have an allis G tank that was sealed many years back.. the new ethanol gas is slowly sofetening the sealer.. i pulled the fuel line the other day and it was packed up to the valve...
 
I used some Red Coat fuel tank liner a couple of weeks ago and spilled some on a saw horse. Out of curiosity this afternoon I put some Kleen Strip paint and varnish remover on it and it removed it. I know just being a couple of weeks old is not really a fair test but I thought I would pass the info along.
 
Bad advise.Many sealers used alcohol as a solvent.Cork gas tank floats were sealed with shellac.Ethanol will ruin them.My 77 chevy had a Rochester carberator with a plastic float that absorbed gas.Ethanol may attack the plastic.
 
(quoted from post at 03:18:28 09/02/12) Bad advise.Many sealers used alcohol as a solvent.Cork gas tank floats were sealed with shellac.Ethanol will ruin them.My 77 chevy had a Rochester carberator with a plastic float that absorbed gas.Ethanol may attack the plastic.

Those composite floats used in many GM cars and trucks were a BIG problem LONG before ethanol was introduced. I personally replaced a BUNCH of them while working as a mechanic in the early '70s.
 

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