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#1 |
Registered User
![]() Join Date: Sep 2001
Location: Cumming, GA
Posts: 471
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JB TankWeld technique
Hi,
I have a leak in my 20 year old steel blazer tank, its located behind the strap, about 3 inches up from the bottom (its on the side of the tank). It is a 1/16" round hole. I don't detect any other weak spots. I'm going to attempt the JB TankWeld product. I'm contemplating tightening a small screw into the hole, tightening it down through the JB stuff before it cures and pressing JB over and around the screw head, or skipping the screw and just using JB. Obviously this low in the tank, the patch will have gas sitting against it at all times. Has anyone attempted this technique? Ryan |
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#2 |
Senior Member
![]() Join Date: Mar 2003
Location: Colfax-California
Posts: 8,549
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Re: JB TankWeld technique
I would pull it out and have it cleaned and a soldered patch put on from a radiator shop
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#3 |
All stock and staying that way
![]() Join Date: Jul 2003
Location: Elkland, PA
Posts: 1,473
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If this is a '69-'72 Blazer, the new tanks with correct filler neck are just over $200.
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1970 K/5 Blazer CST 4WD, Bronze, 93k ACT. miles, 350, 4 speed, positraction, 16.5" x 8.25" wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration in progress... ![]() 1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor... ![]() 2017 Sierra 1500 SLT 4WD, Black, 41k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2... 2019 Canyon SLT 4WD, White, 60k miles, 3.6, 8L45, 3.23 LS, 18" wheels |
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#4 |
Registered User
Join Date: Mar 2014
Location: Pekin, Illinois
Posts: 417
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Re: JB TankWeld technique
I have used JB Weld for tanks before it works well. The big key is to be sure the arear is clean of "everything". Sand it to help the JB bite in tight and use thinner to clean away any conminates from the area. I use regular JB at my shop to fix all kinds of stuff for customers. If done right it works great.
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Harley 1969 Chevy C-10 Long Bed, 350cid, 700R4 |
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#5 |
Senior Member
![]() Join Date: Nov 2018
Location: Waterford California
Posts: 2,531
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Re: JB TankWeld technique
JB Weld is good stuff but....a patch is still a patch.
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#6 |
Registered User
![]() Join Date: Sep 2001
Location: Cumming, GA
Posts: 471
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Re: JB TankWeld technique
My plan is to give JB a try, if it fails at least I tried. This is a Blazer tank mounted under the bed of a 67 stepside, and has a custom fill tube that I would prefer not to have to recreate on a new tank, so my plan is to first try the patch, if that fails remove the tank and inspect it to determine Plan B.
Thoughts on using a screw vs just JB Weld? |
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#7 |
Registered User
Join Date: Apr 2009
Location: newbury new hampsire
Posts: 2,068
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Re: JB TankWeld technique
This may sound silly but couldn’t you fill it with water then weld it
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#8 |
Registered User
Join Date: Mar 2014
Location: Pekin, Illinois
Posts: 417
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Re: JB TankWeld technique
Very true but like me not all of us can buy everything new.
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Harley 1969 Chevy C-10 Long Bed, 350cid, 700R4 |
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#9 |
Registered User
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,216
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Re: JB TankWeld technique
The screw idea sounds good to me. If the screw stops the leak long enough the JBW will set up dry.
George |
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#10 |
Registered User
Join Date: Sep 2016
Location: Ft Smith, AR
Posts: 566
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Re: JB TankWeld technique
I used some kind of fuel tank epoxy stuff (might have been jb weld) on a tank a couple of years ago. Put it on while the leak as actively dripping. I sanded the spot and stuck it on. It worked great. About a year later another leak developed in another spot and I patched it the same way. Then I bought a new tank.
Summary: you don't need the screw. The stuff works great. But, start saving for a new tank. I highly doubt that is the only weak spot. |
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#11 | |
Senior Member
![]() Join Date: Dec 2009
Location: TN.
Posts: 8,134
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Re: JB TankWeld technique
Quote:
I would use the screw and JB weld. Then put Seal-All over the Jb-Weld. Seal all last a long time. Link: https://www.amazon.com/Seal-All-3801.../dp/B008VK0JS4
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________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build |
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#12 |
All about them K’s
![]() Join Date: Jun 2014
Location: Land of Entrapment
Posts: 6,388
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Re: JB TankWeld technique
I’ve used JB a couple times on an old S-10 blazer gas tank. It was the clay type stuff they make specifically for gas tanks and it works really well even when it’s dripping fuel from the hole.
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#13 |
Registered User
![]() Join Date: Sep 2001
Location: Cumming, GA
Posts: 471
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Re: JB TankWeld technique
Update - I did try JB Weld and so far its working. I put a screw into the hole and buried that in the JB Weld TankWeld product. I let it cure for a week and put half a tank of gas in, so far no leaks.
If that ever changes and it leaks I'll post a revision. |
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#14 |
Senior Member
![]() Join Date: Oct 2009
Location: Godley, TX
Posts: 17,964
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Re: JB TankWeld technique
Maybe skip the JB Weld, put a rubber gasket on the screw and you now have a drain plug
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