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Gas Tank Repair
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Mojito Anyone?
 
onel0wcubn's Avatar
 
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Join Date: April 28, 2008
Location: La Habana
Gas Tank Repair - August 22, 2012, 06:52 AM

So I have a slow leak in my gas tank. I thought it was the gasket so I replaced that and its still leaking.

I've found where it's coming from and its not the easiest place to get to. Under the tank there is a "Plate" if you will where the fuel filter bolts to. That "Plate" has about half an inch distance from the rest of the tank to it. The leak seems to be coming from point where this plate meets the tank.

Is this something that can just be jb welded or bonded to secure the leak? I have run some stuff in my atv tanks to stop leaks in the past.

I dont want to spend hundreds when i can spend a few bucks on some sealant...


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August 22, 2012, 07:00 AM

get a pic? Is it a crack or a hole or mismatching surfaces? Jb holds gas no problem so I would try and use that before pouring stuff that will clog everything inside your tank.


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August 22, 2012, 07:21 AM

you cant see the crack or hole or wherever its leaking from... i can only guesstimate the exact place since its covered.

I'll take pics when i pull the tank again today..


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August 22, 2012, 08:12 AM

I would throw some JB weld on it. But I would clean the surface area and maybe even grab some sand paper so you have good adhesion


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August 22, 2012, 09:01 AM

kbs coating. Sealed the shit out of my tank was only 35ish bucks on the interwebz. Seal inside and outside the tank, can be messy sealed on the outside under the plate since nobody sees it.
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August 22, 2012, 09:32 AM

I'd try JBweld first, less messy and cheaper if it does the trick.


2011 Ducati Diavel Chromo (Current)
2007 BMW R1200GS Adventure (Current)
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2003 BMW K1200GT (Current)
2004 Ducati 998s Final Edition (Current)
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August 22, 2012, 09:57 AM

Quote:
Originally Posted by Leoallafila View Post
I'd try JBweld first, less messy and cheaper if it does the trick.

Story time!

I went to go help a friend go buy a bike. The dude selling it was a dill hole, he nearly high sided trying show off his super cool katana. It had busted turn signals, had been down probably 5 times (he claimed he used a brillo pad to remove stickers) HAH BS. But my friend still wanted to check it out so I rode it for him. Hop off it and i'm like "wtf is that smell." Turns out the guy had cracked the tank on both sides where the tank met my knee. His damn tank was leaking fuel through JB weld enough so that my pants were stained from it. Moral of the story, don't use JB weld on a gas tank unless there is a specific type that can contain fuel.


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August 22, 2012, 10:54 AM

Counter-story time!

My current tank had three holes in it from someone trying to do knows what to it. Three 4-5 mm holes in total. I cleaned the area well, put some metal mesh "net" to have the jb weld have something to grasp on, let it sit overnight, covered with bondo, painted and I've got almost 3k miles on it like that just fine: it depends on how you use it, JB Weld does hold gas no prob.


2011 Ducati Diavel Chromo (Current)
2007 BMW R1200GS Adventure (Current)
2006 BMW R1200ST
2003 BMW K1200GT (Current)
2004 Ducati 998s Final Edition (Current)
1997 Aprilia RS250
1998 BMW K1200RS
2000 Ducati 998
1998 Pegaso 650
1999 Ducati 996S
2004 BMW R1150R
2005 Aprilia RSVR Factory
2001 Triumph Tiger 955i
2002 Yamaha FZ1
2006 Buell Ulysses
1991 Suzuki GSX-1100R
1991 Honda Africa Twin 750
2008 Mobster Lefty Trophy pitbike
2004 Aprilia RSVR Factory
1990 Aprilia Pegaso 125
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GP Champ
 
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August 22, 2012, 10:55 AM

reference: J-B Weld Company - Frequently Asked Questions


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2007 BMW R1200GS Adventure (Current)
2006 BMW R1200ST
2003 BMW K1200GT (Current)
2004 Ducati 998s Final Edition (Current)
1997 Aprilia RS250
1998 BMW K1200RS
2000 Ducati 998
1998 Pegaso 650
1999 Ducati 996S
2004 BMW R1150R
2005 Aprilia RSVR Factory
2001 Triumph Tiger 955i
2002 Yamaha FZ1
2006 Buell Ulysses
1991 Suzuki GSX-1100R
1991 Honda Africa Twin 750
2008 Mobster Lefty Trophy pitbike
2004 Aprilia RSVR Factory
1990 Aprilia Pegaso 125
1991 Ducati 888
1995 Honda CR250
1996 Aprilia RS125
1995 Aprilia Sr 50
1984 Kram-it 50
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  (#10)
GP Champ
 
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August 22, 2012, 11:07 AM

^ both above stories have substance. If not done properly jb weld doesnt hold it well. My cafe tank had JB on it from pin holes from a PO. Eventually they did leak while some did hold. Was multiple holes. Seem like from the area you are talking about its hard to get too and therefore JB might be hard to get a nice clean patch on. Could try JB see what happens and if it doesn't work go the KBS route.
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August 22, 2012, 12:11 PM

Quote:
Originally Posted by onel0wcubn View Post
you cant see the crack or hole or wherever its leaking from... i can only guesstimate the exact place since its covered.

I'll take pics when i pull the tank again today..
baby powder.
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