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Engine Sleeve

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deerejon

02-12-2002 18:36:22




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I'm working on a 1934 open fanshaft A. I took the block and had it sleeved back to stock size. When I put in the NOS JD pistons, I tighted up the first piston and then I rotated the crank and pushed the other piston back to the crank to hook up the other rod bearing I noticed that the piston wouldn't move forward. I got to looking and saw that the bottom ring had popped out. I looked at the sleeve and noticed that both sleeves had been bored up approx 3/8 to 1/2 inch and that let the ring pop out. Is this normal to cut the back or the sleeve like this? Also they cut the top part 2" also, I'm told this is normal for the top. I haven't talked to the machine shop yet. Thanks for any help.

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Tractorboy

02-13-2002 15:25:58




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 Re: Engine Sleeve in reply to deerejon, 02-12-2002 18:36:22  
Somebody goofed up bad so make them straighten it out cuz it was not short when they started the boring job .



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Clooney

02-12-2002 18:45:55




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 Re: Engine Sleeve in reply to deerejon, 02-12-2002 18:36:22  
deerejon, what do you mean by "bored up approx 3/8 to 1/2 inch" & "cut the top part 2"?



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deerejon

02-12-2002 18:56:59




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 Re: Re: Engine Sleeve in reply to Clooney, 02-12-2002 18:45:55  
Clooney, The sleeve was bored out approx 1/8 inch wider at the top and 1/8 inch wider at the bottom. The 3/8 to 1/2 inch and the 2 inch are how far they bored into the sleeve.



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Clooney

02-12-2002 19:10:43




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 Re: Re: Re: Engine Sleeve in reply to deerejon, 02-12-2002 18:56:59  
deerejon, the extra diameter at the top won't hurt anything if the piston or top ring doesn't travel there. The extra diameter at the bottom is not correct if the oil ring travels there & the oil ring travels quite close to the bottom of the bore on that A. If the oil ring is traveling into that 1/8" larger bore area the sleeve was installed or machined incorrectly. ~Did they short sleeve it on the bottom? & the extra diameter could be due to the previous bore having been oversized. Look for a faint parting line where the size changes to see if the sleeve actually stops at the point, if so it will have to be re-sleeved to fit your standard pistons.

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fordson29

02-12-2002 19:38:27




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 Re: Re: Re: Re: Engine Sleeve in reply to Clooney, 02-12-2002 19:10:43  
Sounds weird to me. I do know on automotive engines you need to keep about a 1/4 inch at the bottom to make sure the sleeve don't work its way in the engine. Jonathan



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deerejon

02-12-2002 19:38:08




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 Re: Re: Re: Re: Engine Sleeve in reply to Clooney, 02-12-2002 19:10:43  
Clooney, thanks for the information and help.



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