Gas tank repair question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72gmcshorty · 12-09-2003, 10:43 PM

What can i use to patch up a 5/16 hole i drilled by accident into my gas tank? I tried some putty stuff but not too impressed (still leaks). Can JB weld be used on gas tanks and how do you put in on such a big hole?

8.1PWR · 12-09-2003, 10:54 PM

There used to be a product you could get at parts house that would seal a tank with fuel in it. It was popular with 4wheelers. I don't know if it will seal a 5/16 hole. It was more for seams and cracks. You could try a self threading screw with a rubber washer and then use the sealer to seal the screw and washer to the tank.

*rage'nrat638* · 12-09-2003, 11:13 PM

sand the area...istall a screw...or pop-rivet..then j.b. weld it...
or remove it take to rad.shop to get repaired

tmcdanielhsd · 12-09-2003, 11:15 PM

try a stainless sheet metal screw, fender washer and an o ring.

Eddie H. · 12-09-2003, 11:24 PM

Just ask around and you can probably pick up a good tank for next to nothing. So many people are removing the behind the seat tanks and putting a tank in the rear, that they're readily available.
I just gave one away a couple of months ago.

**kwmech** · 12-09-2003, 11:59 PM

He said a 5/16 hole---pretty good size for a sheet metal screw to fill.. Personally I would take it down to the local radiator shop and have it repaired ------the right way. It is gasoline were talking about.

Longhorn Man · 12-10-2003, 12:46 AM

I agree, go to a rad shop. you can have it boiled out to remove all the varnish and rust for little to no extra cost, and have the filer neck inspected too. (Very common leak area on these tanks)
If you want to spend a couple more bucks, then you could dump in a POR15 fuel tank liner kit after getting it cleaned.

walker · 12-10-2003, 12:50 AM

Rad shop or weld it up yourself if you have the equipment. If you are going to weld it write back and ask how, as it can be dangerous if you don't do it right.

12-09-2003, 10:43 PM	#1
72gmcshorty Registered User Join Date: Jul 2001 Location: North Delta, British Columbia Posts: 1,344	Gas tank repair question What can i use to patch up a 5/16 hole i drilled by accident into my gas tank? I tried some putty stuff but not too impressed (still leaks). Can JB weld be used on gas tanks and how do you put in on such a big hole? __________________ 1992 Gmc 2wd 1972 Chevy Blazer 2wd

12-09-2003, 10:54 PM	#2
8.1PWR Registered User Join Date: Nov 2003 Location: Green Valley, AZ Posts: 28	There used to be a product you could get at parts house that would seal a tank with fuel in it. It was popular with 4wheelers. I don't know if it will seal a 5/16 hole. It was more for seams and cracks. You could try a self threading screw with a rubber washer and then use the sealer to seal the screw and washer to the tank. __________________ 1970 Chev C20, 2wd, LB, 350 4BBL, muncie 4spd, 4:10 limited slip. 2002 Chev 2500HD 8.1L Allison, 4X4. 1996 Chev S10 Blazer, 4X4. 2006 Jeep LJ Rubicon

12-09-2003, 11:15 PM	#4
tmcdanielhsd Registered User Join Date: Nov 2003 Location: hillsborough, nc Posts: 10	try a stainless sheet metal screw, fender washer and an o ring. __________________ 69 C10 2wd, LT1, 4L60E, 4.11 2000 F350, 4wd CC 7.3 PSD, DRW 1995 F350, 2wd, 7.3 PSD, DRW

12-09-2003, 11:24 PM	#5
Eddie H. Registered User Join Date: Mar 2001 Location: Paradise TX USA Posts: 1,200	Just ask around and you can probably pick up a good tank for next to nothing. So many people are removing the behind the seat tanks and putting a tank in the rear, that they're readily available. I just gave one away a couple of months ago. __________________ "Negative people always seem to have a problem for every solution"

12-10-2003, 12:50 AM	#8
walker Registered User Join Date: Jul 2003 Location: north of Phx AZ about 30 miles Posts: 698	Rad shop or weld it up yourself if you have the equipment. If you are going to weld it write back and ask how, as it can be dangerous if you don't do it right. __________________ Andy,Phx AZ '67 C-10 (Ahhh, done at last. Well there is that disk front end I want to put in and...) "23 C-Cab-sold '48 Ford 8N tractor(still working) '67 Scout(Now on the road) '70 MG B.-sold

12-09-2003, 11:13 PM	#3
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	sand the area...istall a screw...or pop-rivet..then j.b. weld it... or remove it take to rad.shop to get repaired

12-09-2003, 11:59 PM	#6
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,501	He said a 5/16 hole---pretty good size for a sheet metal screw to fill.. Personally I would take it down to the local radiator shop and have it repaired ------the right way. It is gasoline were talking about.

12-10-2003, 12:46 AM	#7
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	I agree, go to a rad shop. you can have it boiled out to remove all the varnish and rust for little to no extra cost, and have the filer neck inspected too. (Very common leak area on these tanks) If you want to spend a couple more bucks, then you could dump in a POR15 fuel tank liner kit after getting it cleaned.



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