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Farmall & IHC Tractors Discussion Forum
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A cracked block?

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Andy2006

08-31-2006 16:37:50




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I just bought a 1947 Farmall Cub. It was in pretty rusty, dirty shape, but it seems to be sound. While cleaning old grime I found a crack at the front of the engine on the right side. It is right on top of the oil pan, just under the antifreeze tube. I know that a crack is bad, but does anyone know if this is repairable? Or is it better to junk the block?




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Merlin

09-01-2006 22:50:25




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 Re: A cracked block? in reply to Andy2006, 08-31-2006 16:37:50  
You can also take a bolt out of the front cover in front of the crack and drill through the bolt hole and on through the crack into good metal and tap it. When you tighten it up it will close the crack. I too squeeze some JB Weld into it before I tighten it back up. You will have to take the front end off, but you will probably have to do that anyway.



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Paul Moroni

09-01-2006 17:30:56




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 Re: A cracked block? in reply to Andy2006, 08-31-2006 16:37:50  
I have had luck by filling sand around the spot to repair and heating it with a torch lightly. then weld it with stainless wire in a mig welder.



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bdm

08-31-2006 21:01:05




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 Re: A cracked block? in reply to Andy2006, 08-31-2006 16:37:50  
whooops, try this again



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bdm

08-31-2006 21:00:02




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 Re: A cracked block? in reply to Andy2006, 08-31-2006 16:37:50  
I agree with the welding having done this myself. There are also other alternatives
http://www.locknstitch.com/



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Jim Becker

08-31-2006 19:50:43




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 Re: A cracked block? in reply to Andy2006, 08-31-2006 16:37:50  
What the others said is fine for water jacket damage. Unfortunately, the crack you have is structural. It is probably the result of crashing over rough ground, hooking a chain to the front axle or other abusive treatment. A welder that is an expart at cast iron can patch it but it will never be as strong as the original. And the original was weak enough.

If the engine is in decent running condition, do what you can to patch it up. If you need to do major engine work, get a good block to start with. One possible patch is to weld a chain link to the bolt just ahead of the crack and the same to the bell housing bolt just below the starter. Put a big turnbuckle between them to pull the crack shut.

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K.B.-826

08-31-2006 16:53:22




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 Re: A cracked block? in reply to Andy2006, 08-31-2006 16:37:50  
Tom"s right on. External cracks in the water jacket can often be repaired. Best to take it to a welding shop that has done this type of repair before. Cast iron can be very tricky to weld.



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Tom Windsor

08-31-2006 16:46:49




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 Re: A cracked block? in reply to Andy2006, 08-31-2006 16:37:50  
Not every crack in a block means junk it. In the past two years, I have welded cracks in 3 different blocks and they are still satisfactory. The last one was in the water jacket of a G Allis Chalmers. I generally do the welding, then grind it smooth and then go over it with JB weld, then grind it smooth again. I use the JB weld just to fill any pin holes that might have been left over from the welding. You must be careful with the welding, use the proper equipment and know what you are doing.

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