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Gas Tank Repair

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MCOHIO
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PostPosted: Wed Sep 05, 2012 1:08 pm    Post subject: Gas Tank Repair Reply to specific post Reply with quote

Any thoughts regarding fixing two holes in the top of a 55 gallon gasoline tank on a truck that can only be taken out of service for up to 36 hours at a time and no way of completely removing all of the gas because of baffles? No shops in my area will even think about working on it. The tank can not be replaced, I have done a nationwide search. If it were available it would be $1700 +tax&shipping. I tried POR-15 and made sure I followed their instructions. It will last for about a day and a half before the gasoline dissolves the product. The POR-15 agent assured me that 24 hours would be enough for the product to be fuel resistant. I actually gave it about 60 hours of cure time over the holiday weekend. I am thinking of trying PERMATEX brand gas tank repair epoxy. I just don't want to keep wasting time. Any thoughts or experiences? Thanks
 
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rustyfarmall
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PostPosted: Wed Sep 05, 2012 1:22 pm    Post subject: Re: Gas Tank Repair Reply to specific post Reply with quote


How big are those holes? If not too big, maybe a sheetmetal screw with an O ring? If larger than that, maybe a bolt and some JB Weld?
 
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MCOHIO
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PostPosted: Wed Sep 05, 2012 1:35 pm    Post subject: Re: Gas Tank Repair Reply to specific post Reply with quote

One is about 3/8 round the other is hour glass shaped 3/8 x 1 1/2 long.
 
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Lanse
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PostPosted: Wed Sep 05, 2012 1:37 pm    Post subject: Re: Gas Tank Repair Reply to specific post Reply with quote

I'd have a new tank built...
 
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old
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PostPosted: Wed Sep 05, 2012 1:48 pm    Post subject: Re: Gas Tank Repair Reply to specific post Reply with quote

What type of truck do you have that a tank can not be fitted to work on it??? Many a company makes aftermarket gas tanks that can be installed in many places. So what is the truck??
 
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mechanicfred
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PostPosted: Wed Sep 05, 2012 2:18 pm    Post subject: Re: Gas Tank Repair Reply to specific post Reply with quote

We repair tanks all the time. It needs to be steamed out and then sniffed for hydrocarbons before any work is done to it. By sniffed I mean with a scientific instrument to make darn sure it is ready for repair. Guys get killed when they take chances!!!!
 
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Jim in Ma.
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PostPosted: Wed Sep 05, 2012 2:37 pm    Post subject: Re: Gas Tank Repair Reply to specific post Reply with quote

Why not solder it with an iron? No flame involved. Quick and easy.
 
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Tank repair
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PostPosted: Wed Sep 05, 2012 2:47 pm    Post subject: Re: Gas Tank Repair Reply to specific post Reply with quote

It can't be repaired until you get all the gas out. How did the holes get in the tank? They sound like pretty big holes. You're wasting your time if you're trying to do a band aide repair or fixing a tank that should be replaced.
 
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el6147
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PostPosted: Wed Sep 05, 2012 3:13 pm    Post subject: Re: Gas Tank Repair Reply to specific post Reply with quote

clean the area very well to bare metal by what ever means necessary (wire brush and emery cloth) make a metal patch formed to match the contour of the tank and clean that also to bare metal , the metal patch then can be tinned and prepped with 50/50 solder with a torch, the tank will have to be tinned and prepped with solder using an electric solder iron prefferably at least a 600 watt iron, then place the patch on the area and heat it until it melts in . ruby flux is a good product for cleaning and tinning butter that is used is for radiator repair is a good product for tinning before the solder is used . if you dont have any of the necessary products or tools to do this repair its going to be a tough fix and do it correctly , solder irons of 600 watt are tough items to find unless your willing to shell out 300.00 for a new one .
 
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MCOHIO
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PostPosted: Wed Sep 05, 2012 3:19 pm    Post subject: Re: Gas Tank Repair Reply to specific post Reply with quote

The tank is on a 2005 Chevy 3500 express cutaway with a 16' box. The truck has California emissions but as I said in my post earlier a new tank is NOT available (no production) and salvage yards do not sell used tanks. Rust has caused these holes and the conversion to another tank is still over a thousand dollars. My initial thought was to buy a NEW 40 gallon and weld or braze my fittings and fuel pump ring on to the new tank. I have the knowledge and ability to safely work on the old tank except I can not find a shop in southwest OH to boil out my tank.In a pinch to prohibit explosive conditions I have filled other tanks with water and laundry soap and repaired tanks, but without the rust issue. A band-aide approach is against every fiber in my body but I don't see any options. I have not checked into a custom tank, so I don't know the costs associated.
 
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36 Coupe
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PostPosted: Wed Sep 05, 2012 3:43 pm    Post subject: Re: Gas Tank Repair Reply to specific post Reply with quote

I have used JB weld over the years.You can solder a piece of copper flashing metal over the hole if you can get the base metal clean.Boat resin and fiberglass cloth have patched many rust holes in my truck fenders.A friend fixed a quarter sized hole in his plow truck gas tank with a gas tank repair resin I had in my shop.
 
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Dave in Tx
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PostPosted: Wed Sep 05, 2012 3:52 pm    Post subject: Re: Gas Tank Repair Reply to specific post Reply with quote

I have welded dozens of them with the gas still in them. I won't say how on here because you can't leave out any of the prep, but they can be welded. Usually no one will stick around and watch.
 
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PostPosted: Wed Sep 05, 2012 3:54 pm    Post subject: Re: Gas Tank Repair Reply to specific post Reply with quote

Why don't salvage yards sell used tanks? I bet a welding shop could build you a tank for a lot less than $1000, probably around $500 if I had to guess.
 
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Gordo
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PostPosted: Wed Sep 05, 2012 4:48 pm    Post subject: Re: Gas Tank Repair Reply to specific post Reply with quote

What is a plow truck?
 
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glennster
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PostPosted: Wed Sep 05, 2012 4:56 pm    Post subject: Re: Gas Tank Repair Reply to specific post Reply with quote

you could use a product like sem weld bond adhesive. we use it here at the body shop for panel replacement on certain vehicles. you can bond a quarter panel on a car with it, the metal will ter before the adhesive lets go. you need a special applicator gun and the disposable one time use mixing nozzles. it is a 2 part adhesive, it is mixed in the applicator tip. your local body shop will have the applicator gun, you can have them apply it for you. make a patch to fit over the holes, clean and de-grease the area, then apply the adhesive. good to go. heres a link.
once this stuff drys, it will NEVER come off.
poke here

 
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