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John Deere Tractors Discussion Forum
Show Parts for Model:

Re: 1941 model b-cylinder question

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warren woodrow

02-04-2013 12:41:39
74.231.185.160



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Gonna let a machine shop evaluate and tell me if it is within spec to be bored. Hope to save it if possible.




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Wilamayb

02-04-2013 14:39:11
71.15.146.140



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 Re: 1941 model b-cylinder question in reply to warren woodrow, 02-04-2013 12:41:39  
Sometimes It's hard to judge the depth of those pits... It may get bored only to find out that the pits wouldnt clear up...



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warren woodrow

02-04-2013 16:33:10
108.131.120.73



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 Re: 1941 model b-cylinder question in reply to Wilamayb, 02-04-2013 14:39:11  
I guess at that point I could junk it or sleeve it ?



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Wilamayb

02-04-2013 16:54:05
71.15.146.140



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 Re: 1941 model b-cylinder question in reply to warren woodrow, 02-04-2013 16:33:10  
Yup, that'd be the case normally, but according to another poster the early B block can be bored all the way out to the late B bore of 4 11/16. If that is the case there is no reason to have to sleeve your block. Just go for the late B pistons. They are cheap and readily available. That would be 3/8 of an inch of bore over your stock 4.5 inch, which I would have to believe would take care of even the worst pitting...

According to the same post the piston pins are the same size so no rod change will be necessary, only new piston pin bushings in your rods.

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warren woodrow

02-04-2013 17:17:13
108.131.120.73



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 Re: 1941 model b-cylinder question in reply to Wilamayb, 02-04-2013 16:54:05  
Thanks-hope to have the block out of tractor this weekend and pistons seem ready to come out. Been working about a month on freeing the thing up and finally got it to turn yesterday. Absolutely amazed at how much fasteners can rust on an old tractor . Also amazed at what atf,diesel,motor oil, beating on , and patience can do to take one apart !!



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