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JB weld

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Hand Crank

03-07-2001 19:39:49




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Is this stuff as good as they say?Would it seal a cracked block thats been seeping for ten years or so?Tractor runs an looks good.Just tired of looking at that wet spot.Any help or advise would be appreciated.H.C.




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Tom

03-09-2001 19:45:17




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 Re: JB weld in reply to Hand Crank, 03-07-2001 19:39:49  
I would try it. Clean the area as someone else said and grind out a good area for the JB weld to get into the crack. Grind it out enough so you can be sure the JB Weld gets well into the crack. Leave the rough grinder marks in the cast iron. If the JB weld starts to run out of the crack another thing you can do is to put something against it to hold it in place. Wedge, clamp, or otherwise hold a peice of metal against it to press it into the crack until it cures. If you put somithing on this piece of metal to keep it from sticking to the JB weld you won't chance damaging the repair getting it off. Maybe wax paper, plastic wrap, or even a film of grease or oil. After the peice of metal is against the JB weld I would tap it gently with a hammer to shock the JB weld into the castiron. Probably unnecessary. Good luck.

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CDH

03-09-2001 03:51:42




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 Re: JB weld in reply to Hand Crank, 03-07-2001 19:39:49  
hand crank i patcheda block on a 424ih the size of a hen egg with jb seld two years and it has not leaked . so go for it. CDH



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CDH

03-09-2001 03:50:22




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 Re: JB weld in reply to Hand Crank, 03-07-2001 19:39:49  
hand crank i patcheda block on a 424ih the size of a hen egg with jb seld two years and it has not leaked . so go for it. CDH



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Neal

03-08-2001 20:04:17




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 Re: JB weld in reply to Hand Crank, 03-07-2001 19:39:49  
I like Marine-tex myself. I used it to repair the block on a 3-cyl two stroke saab engine. It held the pressure and vaccume of the crankcase! Neal



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ltf in nc

03-10-2001 15:18:34




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 Re: Re: JB weld in reply to Neal, 03-08-2001 20:04:17  
Having used both materials I am glad to see someone recommend the Marine Tex. I agree that this would be my choice. Marine Tex is superior, it is just not hyped as much. It is also cheaper and can be found a major boat supply stores.



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Johnny

03-07-2001 20:00:47




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 Re: JB weld in reply to Hand Crank, 03-07-2001 19:39:49  
Works on my Farmall A, has had a cracked block for about 6 years, I have to reglaze every other year or so, but is cheap compared to replacement. Johnny



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Pappy

03-07-2001 19:48:36




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 Re: JB weld in reply to Hand Crank, 03-07-2001 19:39:49  
Drain the block. Let it dry. Clean the area that is leaking down to bare shiny metal. If it has a crack, grind or file the crack for a "V" groove. Mix the JB Weld thoroughly (you've got plenty of time) and apply to the shiny metal. Smooth it with a putty knife or your finger. Let it cure for at least 48 hours. If the JB Weld starts to run or migrate, you can place a magnet close to it and slow down the migration.

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