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Cracks in Allis B Block

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Bubba Bill

01-04-2002 14:52:36




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Am currently overhauling a CE engine (97000 range).
The lands between the cylinders at the narrow most point appear to have cracks. The cylinder liners are
out and you see the cracks when you look at the machined smooth surface that mates with the cylinder head. Is this a problem or normal?




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Mike Curley

01-07-2002 19:18:17




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 Re: Cracks in Allis B Block in reply to Bubba Bill, 01-04-2002 14:52:36  
I CAN SEE HOW TO SEAL UP THE THREAD END OF THE BOLT TO THE BLOCK. BUT HOW DO YOU SEAL THE HEAD OF THE BOLT TO THE BLOCK ? -MIKE



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steve

01-08-2002 19:15:55




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 Re: Re: Cracks in Allis B Block in reply to Mike Curley, 01-07-2002 19:18:17  
Mike, i think dick said he put an o-ring under the head and had a grove cut for it to set in. You might repost at the top, or send an e-mail directly to Dick L.



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Dick L

01-04-2002 15:14:35




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 Re: Cracks in Allis B Block in reply to Bubba Bill, 01-04-2002 14:52:36  
Rather than call them normal,which no crack should be thought of a normal I would say they are somewhat common. If they are just cracked the gasket will seal them fine. If the crack has opened up it still is not the end of the block.



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Dale E.

01-05-2002 07:01:45




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 Re: Re: Cracks in Allis B Block in reply to Dick L, 01-04-2002 15:14:35  
Hey Dick, Working on a WD45. Block is cracked as described adove and also cracked where the center main bearing lives.This block has already been bolted. Also have a WD block with only one crack between two cylinders.Is the 45 block junk? If so I was planning on useing the 45 crank in the WD block. Question is which parts of which motor to use.(ex. which main bearing and or rod caps etc.)Inards on 45 look better than WD. Out of my league on this one but still trying to hit a homer.Any ideas appreciated. Dale

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Dick L

01-06-2002 09:04:18




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 Re: Re: Re: Cracks in Allis B Block in reply to Dale E., 01-05-2002 07:01:45  
I would not try to repair the WD 45 block if it is cracked through the main journal casting.
I have not switched crankshafts from the WD 45 engines to a WD block my self so I will not voice an opinion. The rods themselves are the same.
As to rod and main bearing caps, they should always be put back exactly where they came from.
The rods are machined at the factory with the cap inplace as well as the blocks line bored with the caps inplace. If the caps are damaged and need to be replaced an engine shop can remachine the rods to properly except the different caps. The block should be relinebored if different caps are used on most engines. Some exceptions can be made to the switching of main caps. If you have to ask the question you really need to have an engine shop at least check the block with the different main caps inplace.

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Dale E.

01-06-2002 12:19:11




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 Re: Re: Re: Re: Cracks in Allis B Block in reply to Dick L, 01-06-2002 09:04:18  
Thanks, thats what I'll do. As always your advice is greatly appreciated!



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