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| Welding a carb? https://slantsix.org/forum/viewtopic.php?t=37481 |
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| Author: | Reed [ Mon Oct 12, 2009 3:43 pm ] |
| Post subject: | Welding a carb? |
Is it possible to repair a carb that has cracked and broken bits? I just bought a Holley 4360 carb off of eBay and it has pat of the air horn and choke mechanism broken. It looks like it is all repairable if I can come up with a way to weld the carb body. JB Weld? Any other epoxy type products come to mind? Thanks! |
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| Author: | coconuteater64 [ Mon Oct 12, 2009 4:57 pm ] |
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I've seen some wacky stuff done with JB Weld. Why not? Should work as long as it's clean. Gas shouldn't hurt it; my gas tank has been patched with the stuff for 4 years now. |
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| Author: | slantsixbob [ Mon Oct 12, 2009 10:03 pm ] |
| Post subject: | |
maybe a tig weld? if you have access to it at least. not sure about the jb weld though. |
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| Author: | Reed [ Mon Oct 12, 2009 10:06 pm ] |
| Post subject: | |
I haven't seen JB Weld hold up very well in contact with gasoline. My experience and almost everything I have read indicates that it slowly dissolves. I tried it on a home-made intake manifold a few years back. it held for a few months, but slowly developed a leak. |
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| Author: | stonethk [ Mon Oct 12, 2009 10:50 pm ] |
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Depending on the way it is broken, solder maybe? I never trust epoxies. |
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| Author: | 64conv65hard [ Tue Oct 13, 2009 5:08 am ] |
| Post subject: | |
JBWeld has different products for different needs. The stuff for fuel tanks has never "broken down" for my patch jobs on my boat fuel tank. I think it should work, just use the correct product. |
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| Author: | KBB_of_TMC [ Tue Oct 13, 2009 9:11 am ] |
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A few years ago I saw some sticks for "welding" potmetal advertised somewhere; I think they were intended for use with a propane torch. I've never tried them, but if you can find them it might be worth a try. |
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| Author: | Reed [ Tue Oct 13, 2009 9:15 am ] |
| Post subject: | |
I will try and find some of the JB Weld product for gas tanks. On closer inspection of the carb I will need to have a fairly plastic media to patch some of the damage, especially to the choke pulloff pod.  If I can't get the JB weld to work, I might just throw in the towel on this carb.  KBB- http://www.muggyweld.com/potmetal.html |
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| Author: | coconuteater64 [ Tue Oct 13, 2009 10:10 am ] |
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Quote: JBWeld has different products for different needs. The stuff for fuel tanks has never "broken down" for my patch jobs on my boat fuel tank. I think it should work, just use the correct product.
this
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| Author: | slantsixbob [ Tue Oct 13, 2009 12:29 pm ] |
| Post subject: | |
Quote: I will try and find some of the JB Weld product for gas tanks. On closer inspection of the carb I will need to have a fairly plastic media to patch some of the damage, especially to the choke pulloff pod.
oh that sucks. throws tig out of the window. well good luck with the other idea then. hopefully it works well so maybe the rest of us can use it if possible If I can't get the JB weld to work, I might just throw in the towel on this carb. KBB- http://www.muggyweld.com/potmetal.html 
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| Author: | Reed [ Tue Oct 13, 2009 12:47 pm ] |
| Post subject: | |
I will let you know. Hopefully I will be able to get to this little project this weekend... 
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| Author: | stonethk [ Tue Oct 13, 2009 2:51 pm ] |
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About 2 weeks ago I took a TIG welding intensive. I had high hopes for some pot metal pieces. I was told pot metal is too porous even for TIG-- same deal with anything cast without pressure. If you hit an air pocket your piece will most likely be ruined. ....so no love for the pencil torch & solder idea eh? |
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| Author: | bbbbbb9 [ Tue Oct 13, 2009 2:56 pm ] |
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What about brazing or leading? |
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| Author: | Reed [ Tue Oct 13, 2009 3:21 pm ] |
| Post subject: | |
I figured I was post some pictures so we all could know what I am looking at: broken lip on the air horn, exposing the float bowl  mangled external choke vacuum pulloff pod  Right now, solder and/or JB weld are at the top of my list for things to try. I am pretty sure I have a spare air horn, so my only real concern is getting that choke pulloff pod to seal up right and be airtight again and flat on the mating surface. Maybe solder the bits together and do a light internal and external coat of JB weld? I was bummed when I opened the box since I bought the carb specifically for the choke assembly.
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| Author: | coconuteater64 [ Tue Oct 13, 2009 5:56 pm ] |
| Post subject: | |
how about extending on of the pod screws, use a piece of L-shaped steel, held in place by that other screw and the lengthened screw. Then slather the odd bits with JB Weld. |
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