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Allis Chalmers Discussion Forum
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Model C

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bart1963

08-08-2004 19:09:51




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We have a 47 Model C with a frozen motor. We have had Marvel Mystery oil, diesel fuel, etc. in the cylinders to free them - no luck. We decided to take the next step and pull the cylinder head and try to get them to come free another way when a friend suggested jacking up one wheel and rocking the wheel with the transmission in 3rd geat. Seemed to be working but noticed that the 2nd and 3rd liners starting to poke up thru the engine block. Now, here's my question... Are we just better off pulling the pistons and liners and starting with a rebuilt lower end , or just go forward with a patch job ?? I'm inclined to just go whole hog and start fresh. Any ideas, Thanks

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steve(ill)

08-08-2004 19:57:33




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 Re: Model C in reply to bart1963, 08-08-2004 19:09:51  
your hunchis correct. the rings will be "s tuck" in the piston grooves, the rod may be lokced to the piston pins. crud on the bearings, and valves probably "stuck" in the guides. Tear it all down and clean it up. Even if you just put new rings, hone the cylinders and put new gaskets It will be worth it. While donw you can clean the bearings and reshim, clean the oil pump and chekc clearance to get a littl more pressure. Pull the liners and put new o-rings on them so you wont have any antifreeze leaks in the future. IN the long run you wont be sorry. Grind the valve while you are at it. i "overhauled" an old locke up engine with $60 for rings and $60 for gaskets, plus a lot of "adjustment" and it runs great now.

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