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Old 01-15-2008, 10:06 PM   #1
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Default JB Weld and Fuel

Does anyone know if JB Weld is resistant to fuel and if it could be used on a fuel rail to fix a leak. Wondering if fuel would destroy the integrity or if it would hold up to use. Any ideas or have tried it?
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Old 01-15-2008, 10:27 PM   #2
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fuel rail leaks could end up like this=

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I'd do it the correct way. whichever way this is.
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Old 01-15-2008, 10:31 PM   #3
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That was electrical, wasn't it?

I think JB weld says it'* fine for fuel. But I wouldn't to risk it.
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Old 01-15-2008, 10:37 PM   #4
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Ouch. That would suck.
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Old 01-15-2008, 10:50 PM   #5
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Default Re: JB Weld and Fuel

Quote:
Originally Posted by jshelton54
Does anyone know if JB Weld is resistant to fuel and if it could be used on a fuel rail to fix a leak. Wondering if fuel would destroy the integrity or if it would hold up to use. Any ideas or have tried it?
Yes, it resists gasoline pretty well (I've used it to patch punctures in motorcycle fuel tanks..years ago, now I solder them closed) but that said, I would not use it to repair a high pressure item, like a fuel injector rail.

If a seam is leaking, it can be brazed closed, or even silver-soldered closed. Brazed with brass or 50% silver solder, the break will be closed up and a very strong repair. (When I convert a rail from quick disconnects to AN fittings, I silver solder them on and pressure test them to 100psi with compressed air, no leaks, no worries
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Old 01-15-2008, 10:54 PM   #6
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Quote:
Originally Posted by J Wikoff
That was electrical, wasn't it?
not sure if the cause was ever found. I know there was some speculation. I was just pointing out what could happen if fuel started spraying on jshelton'* headers if the job is not done properly.
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Old 01-15-2008, 11:05 PM   #7
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Default Re: JB Weld and Fuel

Quote:
Originally Posted by clm2112
Quote:
Originally Posted by jshelton54
Does anyone know if JB Weld is resistant to fuel and if it could be used on a fuel rail to fix a leak. Wondering if fuel would destroy the integrity or if it would hold up to use. Any ideas or have tried it?
Yes, it resists gasoline pretty well (I've used it to patch punctures in motorcycle fuel tanks..years ago, now I solder them closed) but that said, I would not use it to repair a high pressure item, like a fuel injector rail.

If a seam is leaking, it can be brazed closed, or even silver-soldered closed. Brazed with brass or 50% silver solder, the break will be closed up and a very strong repair. (When I convert a rail from quick disconnects to AN fittings, I silver solder them on and pressure test them to 100psi with compressed air, no leaks, no worries
That sounds pretty good.
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Old 01-15-2008, 11:33 PM   #8
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I also wouldn't use JB weld to patch a high pressure leak.

Quote:
Originally Posted by Hans
Quote:
Originally Posted by J Wikoff
That was electrical, wasn't it?
not sure if the cause was ever found. I know there was some speculation. I was just pointing out what could happen if fuel started spraying on jshelton'* headers if the job is not done properly.
Mike'* car was found to be flooded at one time. The resulting electrical demons eventually took his car out.


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Old 01-17-2008, 12:01 AM   #9
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JB weld won't hold against that much pressure when applied from the outside only. Been there, almost burned that. Replace the rail, it'* much safer anyway.
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Old 01-17-2008, 12:25 AM   #10
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Do not use glue
Braze it
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