View Full Version : JB Weld for injector bungs
October 3rd, 2008, 10:22 AM
I've seen a few people using JB weld to hold injector bungs in and was wondering how long they last. Has anyone been running a car with JB welded bungs for a couple of years? Also how well do they stand up in a boosted application?
October 3rd, 2008, 11:15 AM
I take solace in the fact Holley shows it as an option in their injector bung installation instructions.
October 3rd, 2008, 12:09 PM
JB Weld is surprisingly effective in that application. We used it on the Maverick on our custom TBI: tack welded the bungs in place, then filled the gaps with JB.
October 3rd, 2008, 06:32 PM
I have JB weld sealing up the front of my oil pan (the welds were pinholed so I got them as close as I could with steel then filled it in with the 2 part epoxy. I have quicksteel in the timing cover too as a filler between the aluminum sections then formagasketed it in place. I'd be more worried with it breaking down overtime vs its strength. Gasoline is a pretty good sovlent.
October 6th, 2008, 10:09 AM
Yeah, I didn't think strength would be a problem, just concerned with how well it will last. How difficult is it to weld the bungs in without distorting them? I have a friend who's good at TIG welding aluminum but would I still need to ream the bungs out afterwards?
October 6th, 2008, 06:09 PM
I would, welding to cast is tough you have to throw a good bit of heat at it.
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