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John Deere Tractors Discussion Forum
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JD 70 with a sleeve

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andy r

12-04-2007 19:22:17




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Thanks for the comments on my JD 70 gas with a sleeved cylinder. For new readers it has a crack from the sleeve to a water jacket hole (1 1/2" long)and a crack corresponding on the inside along the cylinder. I am sure it was sleeved to fix the block. Sounds like I need to put in new studs to really get it torqued down properly. Seems like most of you guys would give it at least one try to seal up with a new head gasket and bolts. Possibly use a coat of "copper coat" gasket sealer. I guess I would only be out the time and a CarQuest $60.00 complete gasket set (Victor). Sort of a hard thing to sort out with the two possible problems ... either the head gasket or is the crack leaking again? It would seem to me if the sleeve were leaking it might tend to dump coolant into the crankcase. Never found it there. Certainly the startup odor (sweet smell) came from inside the cylinder and one time after a few months of no use there was substancial antifreeze in the cylinder - even hydraulic locked that one time. Probably has to be at the gasket. Head checks out good. Could I ever find a standard bore block and what would it cost? Thanks. andy

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Earl - IL

12-05-2007 13:59:07




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 Re: JD 70 with a sleeve in reply to andy r, 12-04-2007 19:22:17  
Andy, I had my own machine shop for 30 plus years. We did a lot of boring & sleeving. If you pull that sleeve you will find that the crack in that cyl. was due to over torquing of the head studs. Save your self time & money & get a good block. Have a good shop that has done 2 cyl Deere work, resurface the block & head with the proper finish .Rebore if the block is worn to oversize pistons. It will last you a lifetime.You will not be able to seal that permanently with the stress & heating & cooling of the engine.

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Mike M

12-05-2007 04:37:33




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 Re: JD 70 with a sleeve in reply to andy r, 12-04-2007 19:22:17  
Depending on how and where all that crack goes it could actually open up more when torqued down.



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andy r

12-05-2007 06:31:51




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 Re: JD 70 with a sleeve in reply to Mike M, 12-05-2007 04:37:33  
Yep, certainly understand that. For what it is worth this crack doesn't go towards a stud and is a distance away from a stud. I do understand the block could still distort. Thanks



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DSK

12-04-2007 19:46:16




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 Re: JD 70 with a sleeve in reply to andy r, 12-04-2007 19:22:17  
Andy, I have a standard bore 70 block with JD aluminum pistons. E mail if interested.



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andy r

12-05-2007 18:45:38




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 Re: JD 70 with a sleeve in reply to DSK, 12-04-2007 19:46:16  
DSK - how do I contact you??



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