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Rog NCWI 
Bronze Level
Joined: 02 Jan 2018
Location: Aniwa WI
Points: 46
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 Topic: Gas tank hole
Posted: 01 May 2018 at 10:03pm |
How would you fix a small hole in a gas tank? The hole is under the tank where the tank is near the top of the tool box on a Allis CA. Over the years the tank rub on the edge of the tool box. Will solder work? 
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Dipstick In
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Joined: 11 Sep 2009
Location: Remington, In.
Points: 8602
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Posted: 02 May 2018 at 4:18am |
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Yeh, be careful about any flame,,,, use electric iron,,,,,,,,,,, or there are a couple of good resin based repairs that will last for years and years!
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You don't really have to be smart if you know who is!
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Bull
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Joined: 28 Sep 2010
Location: Lamar, Missouri
Points: 589
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Posted: 02 May 2018 at 6:52am |
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I have used JB weld with success.
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WD45 Diesel, RC,CA,IB, B, G, 616, Early B-10, D-10, Terra Tiger, 95G spreader, SC blade
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Dave H
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Joined: 11 Sep 2009
Location: Central IL
Points: 3559
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Posted: 02 May 2018 at 7:26am |
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I used JB on a similar hole in as JD and it worked.
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Clay
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Location: Udall, Kansas
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Posted: 02 May 2018 at 7:31am |
Belzona 1111 (Super Metal) I have used Belzona since the mid 1980's. IT WORKS. The largest leak I ever fixed was on a 90' long patch on a fuel storage tank at a refinery. The welded patch had some porous welds. I used Belzona to seal the leaks.
1. Degrease the area with acetone or MEK. Remove paint for 1 inch around the leak. 2. Roughen the surface. The rough surface gives the epoxy a place to grip. 3. Degrease. 4. Mix the Belzona 1111 (Super Metal). 3 parts base to 1 part solidifier. 5. Apply the mixed material to the repair area. 6. Allow to cure 45 minutes at 86 deg. 7. Place a heat lamp over the repair area and allow it to post cure 2-4 hours (140-22 deg). NOTE: The warmer the temp the faster the cure. Thinner takes longer to cure. There are no solvents in this material. Paint dries by evaporating of solvents. Belzona is NOT paint. It is 100% Solids and does not shrink. It cures. 8. Once the tank cools, sand and paint as desired.
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Gordy
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Joined: 12 Sep 2009
Location: SWMI
Points: 2533
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Posted: 02 May 2018 at 8:40am |
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I have repaired several by filling with water with a small bubble at the hole and brazing them.
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“If you can't explain it simply, you don't understand it well enough”
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jaybmiller
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Joined: 12 Sep 2009
Location: Greensville,Ont
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Posted: 02 May 2018 at 9:01am |
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Yes, solder works fine but so should JBweld...
surface prep is CRITICAL !
first is to get metal bright and shiny
2nd, 'tin' the area. IE put down a layer of solder 3-4x the bad spot
3rd, cut piece of tin 2-3x bigger than 'worn area'.
4th, solder it over the hole
5th, wire brush and resolder if required.
You'll need the extra tin ,as the tank is thin at that spot.
I've also used JBWeld. besure surface is super clean and shiny,clean with alcohol and paper towel,keep cleaning using new section of towel until NO black stuff comes off, NOW it's clean . mix JBWeld real good ! I've used a wire wheel to roughen up the surface to help JBW stick.
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3 D-14s,A-C forklift, B-112
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Never burn your bridges, unless you can walk on water
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Dusty MI
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Joined: 13 Sep 2009
Location: Charlotte, Mi
Points: 5058
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Posted: 02 May 2018 at 10:21am |
J-B Weld is an epoxy. I have repaired carburator floats with 2 part epoxy, and have it work fine, but then in a couple of years have it leak again in the same place.
Dusty
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917 H, '48 G, '65 D-10 series III "Allis Express"
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Macon Rounds
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Location: Pittsburgh Pa
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Posted: 02 May 2018 at 10:36am |
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Wash out with soap and water. Then run exhaust hose from your truck into the tank....
Keep truck running while you solder braze of whatever you wish. Go for the permanent fix, you will be happy in the future.
Edited by Macon Rounds - 02 May 2018 at 3:00pm
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The Allis "D" Series Tractors, Gravely Walk behind Tractors, Cowboy Action Shooting !!!!!!! And Checkmate
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D17JIM2
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Joined: 01 Jan 2013
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Posted: 02 May 2018 at 12:39pm |
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I've done what Mason did and it works. Also put exhaust from my truck into an over head gas tank and brazed it. Carbon monoxide forces out oxygen and don't burn or explode.
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Gerald J.
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Joined: 12 Sep 2009
Location: Hamilton Co, IA
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Posted: 02 May 2018 at 12:46pm |
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There is very little carbon monoxide in engine exhaust, a few parts per million. Most all the rest of the combustion products is carbon dioxide. And we breath out carbon dioxide as the major component of our breath.
Gerald J.
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Tbone95
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Joined: 31 Aug 2012
Location: Michigan
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Posted: 02 May 2018 at 12:58pm |
 Gerald J. wrote:
There is very little carbon monoxide in engine exhaust, a few parts per million. Most all the rest of the combustion products is carbon dioxide. And we breath out carbon dioxide as the major component of our breath.
Gerald J.
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Yep, and water. Balance the chemical reaction equation for burning (oxidizing) any hydrocarbon, and the result is carbon dioxide, water vapor, then very trace amounts of many other things like carbon monoxide, various nitrogen oxides, sulfur oxides, trace amounts of the fuel, etc. The action of the exhaust in the tank is just like a flushing action, with a gas that's virtually absent of oxygen, so it won't burn or explode. You could accomplish the same thing with Nitrogen or argon or MIG gas or many others.
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DaveKamp
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Posted: 02 May 2018 at 1:26pm |
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Or pour in some vinegar, and a couple tablespoons of baking soda. ;-)
Really, once you rinse it out with water, there's gonna be very little fuel left. I burn out motorcycle gas tanks before performing repairs- as long as you remove all the fittings (so it's open), all fumes will burn off, and you're fine.
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Ten Amendments, Ten Commandments, and one Golden Rule solve most every problem. Citrus hand-cleaner with Pumice does the rest.
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DrAllis
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Posted: 02 May 2018 at 2:16pm |
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Solder with a clean surface using a soldering iron. Then, fill the inside of the tank with a gas tank repair coating and let cure. Tank must be clean and dry before pouring this stuff in the tank. Soldering will repair the hole and keep it closed. The tank coating makes double sure there's never a problem. Motorcycle tanks are repaired all the time with this stuff.
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Clay
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Joined: 11 Sep 2009
Location: Udall, Kansas
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Posted: 02 May 2018 at 2:30pm |
If you decide to use an epoxy product, research its chemical resistance. No all epoxies are the same.
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ACinSC
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Joined: 16 Dec 2015
Location: South Carolina
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Posted: 02 May 2018 at 3:22pm |
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I've used J B Weld for years .Never on a gas tank .Works for me . Have cleaned with alcohol before . J B Weld FAQ site says don't use alcohol .Guess I'll use acetone next time .
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Brian Jasper co. Ia
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Posted: 03 May 2018 at 12:16pm |
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JB Weld will work for a while, but it's not a permanent repair. Eventually it will soften and leak. Soldering or brazing is your permanent repair. The best way to clean the repair area is by sandblasting. You remove all traces of rust and it leaves a satin finish perfect for the solder or brass to attach to.
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"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford
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Lon(MN)
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Posted: 05 May 2018 at 8:48am |
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I get my welded. He runs a fuse to it first, then adds a little fire from a distance. Good to go after the first pop.
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Ranse
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Posted: 05 May 2018 at 9:13am |
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I wouldn't use JB weld or anything like that. Welding or brazing is the way to go. I brazed a motorcycle tank once and didn't put anything in it. I got a couple of flash fires and some flames shot out the fill cap hole. It's just a little noise, but they won't explode.
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