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Block cracked

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Robb

01-09-2000 19:23:43




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I have a 1950 John Deere A with a #3 power block in it.I had just put the block in and drove it acouple of times & the cylinders filled with water. (it did not freeze.) Tore it apart & it cracked on the deck were the headgasket sits straight across between the 2 cylinders. I am going to try to weld it. I was told I should preheat the block to 350 degrees first. I was wondering if any one ever did anything like this, also what # & kind of welding rod I should use? Thanks for any help.

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Robb

01-11-2000 20:18:16




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 Re: Block cracked in reply to Robb, 01-09-2000 19:23:43  
Thanks guys for the info a friend of mine who has welded cast before is the one going to do the work. I want to make sure I cover all the bases!!



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BC

01-10-2000 21:51:17




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 Re: Block cracked in reply to Robb, 01-09-2000 19:23:43  
If I thought much of that block, and had not had any experience welding cast, I would find someone who was.



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mark

01-10-2000 11:09:49




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 Re: Block cracked in reply to Robb, 01-09-2000 19:23:43  
nickel 99 rod



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Joe

01-10-2000 17:37:44




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 Re: Re: Block cracked in reply to mark, 01-10-2000 11:09:49  
Welding cast can be a little tricky. if you have
access to a forge, and can grind and pin the crack in the block. Heat the entire block after grinding and pinning, weld it, then cover it to keep it hot and let it cool down slowly. You may have a chance Joe



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clooney

01-10-2000 17:46:24




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 Re: Re: Re: Block cracked in reply to Joe, 01-10-2000 17:37:44  
Joe, can you explain your pinning in a little more detail,it sounds interesting



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Joe

01-10-2000 18:21:13




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 Re: Re: Re: Re: Block cracked in reply to clooney , 01-10-2000 17:46:24  
Clooney, when you grind the crack, you grind small cross v's across the crack. Lay in round mild steel pins that you weld in when you weld the crack shut. This adds strength to the break.
Good luck, Joe



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