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Leaky Gas Tank Repair (Ideas/Advice)

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Old 03-12-2008, 06:33:16 PM
Jeff Blaney Jeff Blaney is offline
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Default Leaky Gas Tank Repair (Ideas/Advice)

Hey there fellows. It's came time to repair the leaks on my gastank (Off a 1935 MM/Twin City KTA) . It has rusted from the outside in after 70+ years of sitting on saddles (metal on metal)

I took it to work and attempted to braze the tiny pinholes. I closed a few up but chickened out and stopped after it started warping. A buddy of mine works at a Composite Shop and says he could probably "glass" the area using a special ethanol resistant cure they have.

Anybody else have any ideas? Solder, JB Weld etc.... Any objections to the fibreglass?

Thanks in advance.
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Old 03-12-2008, 06:42:26 PM
Tom Kilgore Tom Kilgore is offline
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Arrow Re: Leaky Gas Tank Repair (Ideas/Advice)

I fiberglassed a mustang tank one time and it was full of
rust holes on the bottom side and it did fine.tom
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Old 03-12-2008, 07:45:19 PM
21avery 21avery is offline
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Default Re: Leaky Gas Tank Repair (Ideas/Advice)

that gas tank sealer sold buy Lee pederson works good on pin hole leaks and paint the outside with rusty metal primer
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Old 03-12-2008, 08:46:20 PM
Tony Thompson Tony Thompson is offline
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Default Re: Leaky Gas Tank Repair (Ideas/Advice)

I have fixed several tanks in the past. Some of them were so bad I had to cut rusted areas away, and wirefeed patches back in.
On pitted areas I prefer to solder them because it takes less heat and does not warp. If you are not well versed in soldering techniques you can have it done in a radiator shop. Either way, it is advisable to use tank sealer after completing the repair. It is also recomended to drain coated tanks, and let them evaporate dry during long term, or winter storage.
I have witnessed several failed examples of fiberglass fuel cells over the years. Not saying it cant be done, however, If you manage to tighten the hold down straps without cracking the glass, present strong vibrations from an old tractor will probably crack the repair eventually.
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Old 03-12-2008, 10:03:31 PM
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FarmallJeff FarmallJeff is offline
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Default Re: Leaky Gas Tank Repair (Ideas/Advice)

Try JB weld and then line the tank with Johnsons tank sealer works on my problem tanks and it a cheep fix that works.
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Old 03-12-2008, 10:47:28 PM
Kevin O. Pulver Kevin O. Pulver is offline
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Default Re: Leaky Gas Tank Repair (Ideas/Advice)

I've tried soldering some tanks with lots of pinholes, and there comes a point when it's better to line the tank than try to solder them. I like to use Kwik Poly, and I've also heard good things about a product called Kreme. sp?
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Old 03-12-2008, 11:40:38 PM
bocephus_k6 bocephus_k6 is offline
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Default Re: Leaky Gas Tank Repair (Ideas/Advice)

Jeff, we tried that fiberglassing on our John Deere D fuel tank, didn't last worth a hoot, we ended up just having a new botton welded in .

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Old 03-13-2008, 01:23:50 AM
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KyleBlankenship KyleBlankenship is offline
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Default Re: Leaky Gas Tank Repair (Ideas/Advice)

cut the bad part out. replace with metal and grind your welds, thin layer of jbquick sand her down and go to town. ive done it on many tractors i have. works fine.
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Old 03-14-2008, 07:55:17 PM
OneWelder OneWelder is offline
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Default Re: Leaky Gas Tank Repair (Ideas/Advice)

I have used some stuff called ,I believe "Red Seal or red chek seal. (its been about three years and I do not have old can) The stuff is a thick epoxy type paint and it works . I fixed an air compresser gas tank that looked like a strainer some holes wouid have eaisly taken a 3/16 bolt. That was about 5 years ago - still not leaking.
Bought it at local auto parts store, for about $20. per Qt.
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Old 03-14-2008, 08:38:54 PM
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JeffK JeffK is offline
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Default Re: Leaky Gas Tank Repair (Ideas/Advice)

Has anyone tried rubbing a bar of soap on a gas tank leak. I read about it in an old Popular Science magazine.I tried it and it worked. Ofcourse its for a temporary repair, but its great. I always loved Gus Wilson the Model Garage,and his helper Stan Hicks from the Popular Science magazine
Idle hands are the devils workshop
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Old 03-15-2008, 08:06:40 PM
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Craig A Craig A is offline
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Default Re: Leaky Gas Tank Repair (Ideas/Advice)

The best stuff I've ever used for sealing tanks is POR15.
The cured coating is unbelievably strong.
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Old 03-16-2008, 12:39:45 AM
Joe Hugh Joe Hugh is offline
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Default Re: Leaky Gas Tank Repair (Ideas/Advice)

Did a Model A tank that was pitted through from the outside where the windshield butts against the tank. Cleaned the rust using acid, then soldered and filed smooth. Hasn't leaked in 30 years.
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Old 03-16-2008, 12:59:21 PM
BobM BobM is offline
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Default Re: Leaky Gas Tank Repair (Ideas/Advice)

gas tank sealer is sold by many vendors and any old car or motorcycle vendor por15 is good but make sure it is for the new type fuels out there or you have a real mess
bought a model A few year back and someone had put in gas tank sealer and by the time i got it the sealer was inthe bottom of the tank and was about 3 inches of goo what a mess
what i have used on model T tanks and my hit and miss engine is a product called qwik poly but i think now its acvalled poly 2000 its a two part epoxy that is like water
and is not harmed by gas or oil and has tons of uses
it is mainly a wood restoration product and i used it from wagon wheels to home furniture repair sealing gas tanks and
as an electrical insolator sets up in 5 minutes can be mixed with any non oily items and be shaped driled and nailed when hard and has 1% shrink rate
i have been using it for the past 10 years and has saved many items
good luck and no matter what you use yourtank should hold liqued again realy soon
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