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Tool Talk Discussion Forum

JB Weld

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sunnyboy

05-11-2008 11:54:54




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is JB Weld as good as it is said to be, i need to set in a stud in a block for a waterpump, bolt broke off, drilled it out, would like to use JB weld for this.




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dr sportster

05-12-2008 17:21:33




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 Re: JB Weld in reply to sunnyboy, 05-11-2008 11:54:54  
If you read the package it sounds good but also figure you labor time when /if the J-B weld fails.If you mean on an engine I think it wont work. Im a J-B weld lover but think of the pull the nut has against the stud when tightening.More than likely it will break loose in the J-B weld.Why have one stud that you cant torque fully.It would be more for an emergency repair untill you get time to fix it right.So nows the time in my opinion.

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soundguy

05-12-2008 15:44:33




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 Re: JB Weld in reply to sunnyboy, 05-11-2008 11:54:54  
Use some kind of thread insert.

Puzzled? when you drilled out hte broke stud, why didn't you drill smaller than the OD, and then use an extractor.

You can also possibly OS the hole and bushing.. or use a stud that has a larger base diamater.

soundguy



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deadeye012

05-12-2008 07:41:04




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 Re: JB Weld in reply to sunnyboy, 05-11-2008 11:54:54  
Fastenal has a heli-coil called EZ-lok that works good. You order it by size and it comes with the right size tap. EZ-lok insert has adhesive on it that sets up when it gets hot from engine heat after inserted. Search for EZ-Lok on their webpage... JB



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dave2

05-12-2008 01:35:48




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 Re: JB Weld in reply to sunnyboy, 05-11-2008 11:54:54  
Never know til you try it. I'd say the bigger problem would be getting it clean enough to bond.

Dave



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CNKS

05-11-2008 16:44:00




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 Re: JB Weld in reply to sunnyboy, 05-11-2008 11:54:54  
JB Weld is for non-stressed areas.



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RusselAZ1

05-11-2008 16:11:10




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 Re: JB Weld in reply to sunnyboy, 05-11-2008 11:54:54  
JB weld won't take the heat. A good auto parts supplier will have an epoxy stuff that will replace the threads and hold.



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montanagriz

05-11-2008 12:26:48




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 Re: JB Weld in reply to sunnyboy, 05-11-2008 11:54:54  
why dont you just use a heli coil??



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bradk

05-11-2008 13:15:47




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 Re: JB Weld in reply to montanagriz, 05-11-2008 12:26:48  
Heli-coil or drill/tap to install larger stud.May have to drill out water pump hole to accept larger stud.

JB Weld has it's uses,but not for setting a stud like you mentioned.It'll pull right out.



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Mark - IN.

05-13-2008 20:03:38




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 Re: JB Weld in reply to bradk, 05-11-2008 13:15:47  
Would even a heli-coil hold up under the stress and vibration for a water pump? I've used heli-coil myself on some applications, but nothing real stressful. I agree with one poster above, wondering why he drilled out to a larger hole instead of using an easy-out bit. But, what's done is done. Initially I'd think tap the larger hole now, but the con to that would be weakening the already weak boss at the water pump by drilling it for the larger bolt. Guess could be done or tried though. Have heard of JB Weld, never seen or tried it though. Isn't sounding like I'd trust it at least under the circumstances. Then again, can't hurt to try a heli-coil first, especially for the cost. Could weld it closed and drill and retap it, but the block would have to be out for that. I've had crank journals welded up and reground back down to standard.

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