I have an aluminum intake with a broken carb mount. The mount is broken off, not cracked. I have never used J-B Weld on am wondering how well it works on gluing cast aluminum?
its strong, but I dunno if it will hold for something like that. I think the original formula is strongest, not the quickset type. maybe take the intake to a welder and toss him a $20. and a 6 pack to tig it back together.
I bet it would work. Especially if you epoxied up the mounting hole as well. You will have to drill and tap the epoxy for the bolt but that is common to do with JB weld. I would try it. Just give it plenty of time to cure before drilling and tapping it. As with aluminum anyway, do not over tighten it when mounting the carb, and try not to bottom the tap out while tapping it.
JBWeld will hold just about anything that doesn't have tin in or on it. Tin will not let it set up. They used to send demo kits with the JBWelb. One of the was 2 valves stuck face to face. I tried to berak them apaprt with an 8lb sledge. Busted the stems, but the faces held tight. It is pelnty strong enough for Aluminum.
I'm running an intake just like that now, piece missing the size of my thumb. J-B weld has worked for a year. Get it very clean, build a little damn from tape, fill it up, shape to suit. Or just have it welded.............OLDBEET
Tard- You should check out a product called Belzona- it's like J-B Weld on tweak. We've used Belzona 1221 and 1111 for years in the oil patch and the **** is amazing- it's fully machinable, has expansion properties similar to steel (meaning it won't crack and fall off after a few thermal cycles) and is hell for stout. They come in small (I believe 6 ounce) 2 part kits. I'd recommend a dealer close to you but I don't know which river you live by.
I am capable of welding aluminum, I have a spool gun and several years worth of experience. Having said that, I say, go ahead and try it. I prefer you try to glue the broken piece on rather than mold the piece from JB. Hey, if it doesn't work, fix it better the second time. I have done several successful repairs like that myself before I started welding aluminum.
I tried that on a Shelby 289 manifold years ago, it worked but if I had to do it again would have it tig welded.
My Intake RIGHT NOW is fixed just like that!! Was cracked when I got it but was holding, and then one day while driving I got a HUGE vacuum leak! The piece finally broke off and the carb leaked at the base. So I limped it along to an auto place (schucks, checker, kragen,etc) I bout a pack of JB weld, a can of carb cleaner, and I borrowed a cordless drill and a small bit from them, I then drilled several small shallow holes in the intake, and several in the broken piece (for more "bite"), the stud was still in the manifold, so I cleaned everything real good with the carb cleaner, mixed up the JB and put it in all the small holes I drilled, put some on the broken piece and the manifold, got a piece of duct tape to hold it till it hardened, and went off to lunch, and browsing around town. Came back about an hour and a half later and the JB was hardened. I forced some silicone into the carb base area, "SOFTLY" tightened down the carb and drove it home. After I got home I took off the carb, looked everything over and decided to let the JB cure till the next day, I then filled the intake valley with a rag, cleaned up and filed the JB to look better and then re-gasketed the carb with a gasket and sealant, and it has held with NO problems. While not the exact ideal way to do it, I was "stranded" and had to get home, but so far (OVER A YEAR NOW) no problems. <--------------- VERY LONG, sorry I know, but just wanted to put your mind at ease that it WILL work... BUT Kinda like welding aluminum, --the cleanliness-- part is VERY important. Ken
Used JB to fix a nasty crack in an iron manifold and its still holding 7 years later, I don't even own the car anymore but my friend has had no leaks yet!
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