Should I Seal a New Gas Tank?? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 09-30-2010, 06:46 PM
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Should I Seal a New Gas Tank??

Just received a new gas tank for my '63 T'Bird HT. Got it from Rock Auto and looks like a nice unit. According to all the markings and paperwork, it was made in Canada.

My question is; should I seal it internally using one of the "slosh" kits available before I install it? Due to the nature of the 'Bird (strictly a Saturday Night / Sunday Afternoon Cruiser and occasional participant in local Bring & Brag), she may sit idle for a couple of weeks at a time. I use gas treatments, but don't always keep the tank filled to prevent condensation.

Would appreciate any thoughts/comments/recommendations.

thanx,

texastomeh

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Old 10-01-2010, 01:31 PM
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gas tank

I would not put anything in it, it's a new tank. It doesn't hurt it to sit for a couple of weeks. I'm in MN. and we let them sit all winter, we put staybil in the tank, I never have any problems , and the car starts right up in the spring. I have been playing with hot rods for 50 years.

Later 35 terraplane

I do keep my cars in a heated shop, but I know a lot of guys that don't, but we only get down to -40f in the winter.
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Old 10-01-2010, 07:23 PM
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I went to a shop here in st louis to have a sump welded onto my new tank and had asked them the same thing. The told me not to put sealer in a new tank. it has to have something to etch and hold onto the sides of the tank, like rust or whatever. he said the new tanks are just too slick, new. If it doesnt seal right it will chip away on the inside of the tank and all of the sudden you have a fuel contamination issue that could possibly ruin alot of parts.

Just what ive been told by a reputable shop here.
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Old 10-01-2010, 07:51 PM
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some fuel tank data

i know one who had his old tank professionally sealed. later he had fuel contamination problems and had to discard the tank.

i have a 66 gmc truck that has spent a few decades outside with no fuel contamination problems. still has the original tiny fuel filter at carb.
the truck has a well designed fuel cap.

i have run into stopped up fuel tanks on classic mustangs that sat outside.
i suspect that rain found it's way into the tanks. fuel caps are pretty but don't seem to seal tightly.

i have kept a couple mustangs in garage for about 2 decades. they have sat for up to two years w/o starting. the OEM fuel tanks are fine.
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Old 10-01-2010, 07:57 PM
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Guys I REALLY appreciate all your inputs!!

I also posted this question on two other appropriate forums that I frequent. The inputs have been UNANIMOUS in recommending NOT sealing the tank for some very good reasons. So, I won't!!

Thanx again!!

texastomeh
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