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Tractor Talk Discussion Forum

Gas Tank Repair

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Mike in UP of M

10-22-2006 20:01:31




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I found some leaks in the top of the gas tank on my model B John Deere. There are several pin hole leaks rusted through. It is mainly in one area where the hood strap contacts the tank. How would a gas tank repair shop fix these holes? Would they solder, weld a patch over them or fix with an exopy like JB Weld?
Thanks, Mike




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Jerry Cent. Mi.

10-24-2006 15:47:42




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 Re: Gas Tank Repair in reply to Mike in UP of MI, 10-22-2006 20:01:31  
I have poor luck with JB weld. I prefer PC-7. Its sold in most Ace and HWI hardware stores. More costly but you get more. Take longer to harden but that give more time to work with it.



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Leland

10-23-2006 21:42:34




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 Re: Gas Tank Repair in reply to Mike in UP of MI, 10-22-2006 20:01:31  
I have saw people just rub a bar of soap over holes held until it rained funny the gas would not dissolve the soap .



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Dick L

10-23-2006 09:37:33




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 Re: Gas Tank Repair in reply to Mike in UP of MI, 10-22-2006 20:01:31  
Go to the next page under gas tank liner and click on Eastwood. You get the inside clean and dry and you can tape the pinholes and coat the inside per directions. The inside is coated with a plastic coating and you can bondo the outside in prep for paint. Treat the pinholes as you would rust pits. It will last forever if done right.

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Mike M

10-23-2006 05:26:37




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 Re: Gas Tank Repair in reply to Mike in UP of MI, 10-22-2006 20:01:31  
I have repaired some that were pretty swiss cheesed by soldering them. But you have to get them clean first and I sandblast them to clean them up then also use acid core solder. That copper patch idea sounds like a good idea,wish I'd done that on the bigger holes.



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souNdguy

10-23-2006 05:03:34




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 Re: Gas Tank Repair in reply to Mike in UP of MI, 10-22-2006 20:01:31  
Bob gave you jamb up good advice. In a pinch I've soldered a copper penny over many a pinhole in a sump ( drained and properly fire proofed.. etc )

In lieu of that.. an external gas resistant pucky is your next best bet.

JB weld is gas resistant once it is cured. So is jb-water weld white stick... It will even stick to gas-wet metal, aas well as other comercial 'gas tank repair' epoxies.

Clen the area to shiny metal.. degrease, then whipe clean with alcohol, apply a good layer of pucky.. sand smooth after cureing..

Soundguy

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Bob

10-22-2006 23:20:22




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 Re: Gas Tank Repair in reply to Mike in UP of MI, 10-22-2006 20:01:31  
Getting a radiator shop to SOLDER a gas tank didn't used to be a problem, and is the BEST fix.

I have had tanks repaired where they soldered a nice copper patch over the damaged area, making a GREAT permanent repair.

Since it is getting tough to find a shop that will still do that, for liability reasons, I solder them myself, rest assured, in a SAFE manner, which, I guess I'd better NOT explain here, for liability reasons.

Solder is BY FAR a more permanent fix than "goo pucky" from the auto supply store.

Don't blow yourself up, and blame me, though!!!

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Grub

10-22-2006 21:28:25




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 Re: Gas Tank Repair in reply to Mike in UP of MI, 10-22-2006 20:01:31  
I successfully used a Permatex product I bought at the auto parts store. It looks like a tootsie roll, you knead it for a minute to activate the two-part product and press it on.
My Ford truck got some pinholes where the support straps retained moisture.
Problem solved.

Grub



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135 Fan

10-22-2006 21:20:45




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 Re: Gas Tank Repair in reply to Mike in UP of MI, 10-22-2006 20:01:31  
I had the same problem on my Hino truck. The straps got a little loose and from moving around in a little dirt wore through the rubber under the strap and caused pin holes. It was a big tank and I didn't want to take if off. It was on the top of the tank so I wire brushed it really clean and used JB weld. I didn't have a welder at the time but it worked great. Make sure there is no gas that would cause the JB weld not to stick and let the repair dry for a day. I used a little water on my finger to smooth it out just like you do with silicon. I got some thicker rubber to put underneath the straps. Hope this helps. Dave

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perry in mi

10-22-2006 20:28:55




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 Re: Gas Tank Repair in reply to Mike in UP of MI, 10-22-2006 20:01:31  
there is a product called SEAL ALL that i herd works good for a quick cheap fix on tanks. JB weld should work to.



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135 Fan

10-22-2006 21:29:04




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 Re: Gas Tank Repair in reply to perry in mi, 10-22-2006 20:28:55  
Seal all would probably work but doesn't harden like JB weld. Once it is dry it is less likely to get ripped off under the strap. Welding or brazing would work but then you have to worry about gas fumes and the thinness of the tank when welding. Dave



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