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Tractor Talk Discussion Forum

JB Welding a engine block

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Head

01-03-2005 18:52:21




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I have a International tractor that had a busted block on the outside at the water jacket,I JB Welded it up and it worked for a while now it is leaking at different spots,so should I operate the tractor and get it warmed up and then drain the water out and then JB it again,hoping that the metal has expanded enough or when it cools would it put pressure on the JB and bust the block somewhere else. Or should I JB it while the block is cool? Any help would be appreciated.

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Shaggy

01-04-2005 06:06:10




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 Re: JB Welding a engine block in reply to Head, 01-03-2005 18:52:21  
I I know a guy that uses the rubber stuff that you use to seal new windshields and he has had good luck with it on a Farmall B that he uses for mowing.



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cannonball

01-04-2005 05:14:45




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 Re: JB Welding a engine block in reply to Head, 01-03-2005 18:52:21  
the ones i saw fixed that had cracked to outside ..they drilled ends to stop crack.. then put screws in the crack about 1 inch apart then ground off screw heads..cleaned up good put expoxy on .. i asked why they said to make expand like it did when hot..have nice day may god bless



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Keith-OR

01-04-2005 00:21:30




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 Re: JB Welding a engine block in reply to Head, 01-03-2005 18:52:21  
Also you need to drill a small hole at each end of the crack to keep it from cracking any further.
Just my 2 cents
Keith in Gods country



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Weirsdale George

01-03-2005 21:18:13




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 Re: JB Welding a engine block in reply to Head, 01-03-2005 18:52:21  
If the leaks are small, I'd try a radiator leak-stop first.

If you do use JB Weld or the Devcon material, the most important thing is to make sure the surface is absolutely free of any oil, water, paint or other contaminant. You can't get it too clean!



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David B

01-03-2005 20:42:23




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 Re: JB Welding a engine block in reply to Head, 01-03-2005 18:52:21  
My experiance with JB weld is that it doesn't hold up well in heat. Otherwise, that stuff is awesome!!



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lucass

01-03-2005 19:16:57




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 Re: JB Welding a engine block in reply to Head, 01-03-2005 18:52:21  
i would use some deavcon plastic-steel putty. you can get it from gemplers.com .its about 25.00 for a pound. just rufff it up real good,wipe it down with some laquer thinner and apply .it will take a day to cure in warm weather,or you can put a lamp on it if its cold outside.i use it with the block cold.this stuff is good for pinholes in gastanks too. lucass



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UncleTom

01-04-2005 03:05:03




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 Re: JB Welding a engine block in reply to lucass, 01-03-2005 19:16:57  
I once had the kids honda 70 when they were little spark plug fowl alot. I showed them how to take it out and clean it so they could ride it. They ended up stripping the threads in the head. I had a head to put on it but wouldn be able to change it right a way. I JB welded the spark plug into the head.(cleaned it up very well) I thought that it may last an hour maybe a day(hot cold cycle), but atleast they could ride.It never did come out.

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Jerry Cent. Mi.

01-04-2005 05:08:47




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 Re: JB Welding a engine block in reply to UncleTom, 01-04-2005 03:05:03  
I use PC-7. Its available in most hardware stores in two parts in small cans that you mix the contents with just like JB but their is a lot more of it. It takes longer to cure (like over night) and is easier to work with and I have a lot better results.



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