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06-20-2008, 08:23 PM
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#1 | | Member
Advisory Panel
Name: Michael Shelley City: Wilson State: NC County: Wilson Join Date: Jul 2005 Age: 59 | JB Weld
This question is for those of you who are experienced in using JB weld.
Q. Will this stuff seal a leak even if the leak is in progress at the time the stuff is applied?
Mike |  
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06-20-2008, 08:24 PM
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#2 | | Senior Moderator
Name: Tracy City: Salisbury State: NC County: Rowan Join Date: Feb 2008 Age: 47 | Re: JB Weld
What kind of leak?
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06-20-2008, 08:24 PM
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#3 | | Member
Name: Dennis Reynolds City: Ivan's Corner (Monroe) State: NC County: Union Join Date: Jan 2007 | Re: JB Weld
Nope
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06-20-2008, 08:26 PM
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#4 | | Senior Moderator
Name: Tracy City: Salisbury State: NC County: Rowan Join Date: Feb 2008 Age: 47 | Re: JB Weld
Never had it seal anything currently leaking, or leaking during the curing time.
__________________ Tracy
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06-20-2008, 08:35 PM
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#5 | | Member
Advisory Panel
Name: Michael Shelley City: Wilson State: NC County: Wilson Join Date: Jul 2005 Age: 59 | Re: JB Weld
Well, I can vouch for it not sealing, just wanted to know if someone had actually had luck with it. Long story short, my planer is weaping oil from the gearbox via two pin holes in the casting. I plan on draining the oil from the gearbox next week and try again. The holes had to be there the whole time but finally the oil worked it's way through the paint. Probably some air voids in the casting. Really @#$$%$ me off but what are you going to do. Right, fix a problem not caught by the off shore folks. I have been very happy with the planer all in all so I guess this is just a little bump in the road.
Mike | |
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06-20-2008, 08:44 PM
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#6 | | Member
Name: Dennis Reynolds City: Ivan's Corner (Monroe) State: NC County: Union Join Date: Jan 2007 | Re: JB Weld
The problem is the oil has probablby soaked into the pores of the casting metal & will inhibit the bonding of the metal to the JB Weld. You'd have better luck draining the gear box & cleaning the pinhole with a degreaser such as lacquer thinner or spray carb cleaner. If it's just a smill pinhole, try a self drilling screw if aesthetics aren't a concern. Otherwise, drill & tap it with a tapered tap & put in a set screw with some RTV silicone or Loc Tite. If it's in an area subject to stress such as a bearing seat, I'd try welding with nickel welding rod.
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"Whether you think you can or you think you can't - you're right." - Henry Ford | |
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06-20-2008, 09:44 PM
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#7 | | Member
Advisory Panel
Name: Michael Shelley City: Wilson State: NC County: Wilson Join Date: Jul 2005 Age: 59 | Re: JB Weld
The area where it is leaking is on the top of a protrusion where the oil seal is located. I don't fancy drilling holes in the casting and if there is no simple fix, I will just get a replacement cover. I do think I will drain the oil, clean up the area and give it another try.
Mike | |
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06-20-2008, 09:51 PM
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#8 | | Member
Name: Dennis Reynolds City: Ivan's Corner (Monroe) State: NC County: Union Join Date: Jan 2007 | Re: JB Weld
If the area is not subject to pressure, you may try just cleaning it up & applying some RTV silicone from the inside.
__________________
"Whether you think you can or you think you can't - you're right." - Henry Ford | |
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06-20-2008, 10:09 PM
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#9 | | Member
Name: jeff... City: State: NC County: Granville Join Date: Mar 2006 | Re: JB Weld
JB Weld needs a clean dry surface to bond to. oil or water + JB Weld = Failure. Don't know if this hole of yours is under pressure - but I have seen folks fix holes in oil pans on old tractors and gear boxes with a regular old tire plug - seemed to work well... as long as you can jam it up in there. But I don't recall any of the covers being cast - so I don't know if it'll work... Try drilling a hole and tapping it put a short bolt in the hole with some loc-tite and rubber washer that should take care of the leak.
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06-20-2008, 10:20 PM
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#10 | | Member
Name: Bruce City: Apex State: NC County: Wake Join Date: Nov 2005 | Re: JB Weld
If it were mine (it isn't), I would drain and remove gearbox cover. Clean it with some detergent (solvents will probably take the paint off). Let dry, and then JB Weld from the inside. You may find some more pores that also could use some attention. | |
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06-20-2008, 11:50 PM
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#11 | | Moderator
Name: Peter Davio City: Hope Mills State: NC County: Cumberland Join Date: Dec 2005 Age: 39 | Re: JB Weld
I like Bruce's approach to fixing the problem.... I need to pick up some JB Weld to fix a hole in the intake in my truck, it is pouring water onto the alternator as fast as I pour it into the radiator...
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06-21-2008, 08:54 AM
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#12 | | Member
Name: Jim City: Cary State: NC County: Wake Join Date: Oct 2005 Age: 58 | Re: JB Weld
Don't know if this will work or not, but years ago when I flew RC airplanes, oil from the fuel would often get under the covering and into the Balsa wood frame which weakened it.
I learned back then that K2R spot remover is an excellent way to pull oil residue out of a surface. Spray on, wait until dry, brush off. Several treatments would make Balsa wood almost like fresh again.
It might degrease the casting enough to allow a JB Weld.
Jim
Last edited by JRD; 06-21-2008 at 08:55 AM.
Reason: spell error
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