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?

fuel rail leaks could end up like this=

Attachment 36802

I'd do it the correct way. ;) whichever way this is.

That was electrical, wasn't it?

I think JB weld says it's fine for fuel. But I wouldn't to risk it.

Ouch. That would suck.

Re: JB Weld and Fuel
 

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 :lol:

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's headers if the job is not done properly. ;)

Re: JB Weld and Fuel
 

That sounds pretty good.

I also wouldn't use JB weld to patch a high pressure leak.

Mike's car was found to be flooded at one time. The resulting electrical demons eventually took his car out. :cry:


Ed

JB weld won't hold against that much pressure when applied from the outside only. Been there, almost burned that. Replace the rail, it's much safer anyway.

Do not use glue :!:
Braze it :!: