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Allis Chalmers Discussion Forum
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Is engine block o.k.?

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Chuck Luedtke

07-29-2003 19:07:10




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Ripped apart WD45 diesel engine. Found two scored and stuck pistons but there are hairline cracks inbetween each piston sleeve on every cylinder. Is the block still good or is it a lawn ornament.




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allisman

07-31-2003 10:06:17




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 Re: Is engine block o.k.? in reply to Chuck Luedtke, 07-29-2003 19:07:10  
maybe you should just call me and say its to much work and ill come where ever you are and get it off your hands,just wishing, but let get serious a cracked block is not a major problem with an allis motor good luck on your rebuild.



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Dick L Still Good

07-30-2003 08:06:41




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 Re: Is engine block o.k.? in reply to Chuck Luedtke, 07-29-2003 19:07:10  
But check the bottom for cracks after you have pulled the sleeves. Probly aint none but check it good anyways.



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Chuck Luedtke

07-30-2003 17:27:14




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 Re: Re: Is engine block o.k.? in reply to Dick L Still Good, 07-30-2003 08:06:41  
So if there are no cracks in the bottom areas of the block then we are still in business? If this is so this is very good news. When I brought this tractor home from my dad's there was still coolant in the block which drained when I opened the drain plug on the right hand side and the coolant still had a good strong antifreeze color and smell to it so I thought it would be o.k.. Now I just have to free up two of the six pistons and the head has a couple of rusty stuck valves due to water probably getting down the exhaust pipe over the years that it sat. Thank you very much for your help. This forum and all of you people out there are unbelievably helpful. Thanks again.

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Dick L

07-30-2003 19:02:04




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 Re: Re: Re: Is engine block o.k.? in reply to Chuck Luedtke, 07-30-2003 17:27:14  
I think you will find those cracks are from the engine over heating some time or other not from freezing. When they crack from freezing you will see a wider uneven crack. That does not always make it bad eather. The head gasket will seal it up quite nicely. The compression chamber seals with the metal rings in the gasket between the sleeves and the head the rest of the gasket seals the water and oil openings. If there is a crack in the webs between the cylinders in the botton you can even pour in an inch of expanding block cement and seal those up as well. If you use the cement you have to rehone the cylinder bores as this stuff pinches the hole smaller in that area. Might be more information than yall wants but who knows.

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Chuck Luedtke

07-30-2003 20:29:41




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 Re: Re: Re: Re: Is engine block o.k.? in reply to Dick L, 07-30-2003 19:02:04  
No, that is just the information I am looking for. Now that I know this, I can start looking and acquiring all the other parts. I need a new or probably a reground camshaft and other than the oil pump gear that I found, I need to get a new shifting lever and probably new or good used fork slide rods cause the ones that I have are all pitted real bad cause the shifting boot had deteriorated away years ago. Thank you for your help.

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Dick L

07-31-2003 07:46:59




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 Re: Re: Re: Re: Re: Is engine block o.k.? in reply to Chuck Luedtke, 07-30-2003 20:29:41  
A little more information on the expanding block cement. I you are going to use it ya might keep in mind that to make the block drain do its job afterwords you will have to put a street elbow on the inside before you reinstall the sleeves. Need to put paper tape over the top of the elbow to keep it open. Put a water hose on the outside of the drain and flush it out with water and the paper tape will float out the top of the block.

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