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John Deere Tractors Discussion Forum
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Sleeve in a John Deere 70

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andy r

11-27-2007 15:37:06




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My John Deere 70 seemed to seep antifreeze in the cylinder as I could smell it once in awhile upon start up. I never did used any block sealer. I decided to replace the head gasket. I found a small crack on the face of the block from a water jacket hole towards the cylinder. A little over an inch long. The crack didn't go into the cylinder. After further examination I found out why it didn't go clear through to the cylinder. I found it has been sleeved. Both cylinder walls look great. Pistons appear good from the top. Tractor has good power. Doesn't burn any oil. Do I put it back together with a new head gasket using maybe some coppercoat gasket sealer and see if that cures the problem???? Possibly run some block sealer. Were cracks in the cylinder commonly fixed that way, with the sleeve and no welding???? Any suggestions are appreciated. andy

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yello fello

11-27-2007 20:23:24




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 Re: Sleeve in a John Deere 70 in reply to andy r, 11-27-2007 15:37:06  

DickD said: (reply to post at 01:48:54 11/28/07i have had great results with this stuff in the same situation)



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johns48jdb

11-27-2007 18:14:13




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 Re: Sleeve in a John Deere 70 in reply to andy r, 11-27-2007 15:37:06  
there is a method where they drill a hole or two in the cracked area and drive metal pins into the holes to seal them up. drilling at the end of the crack is suppose to stop the crack from getting worse. i had a head done that way, but don't know if i ever heard of anybody doing a block that way. should work i think. do you not get some water in the oil from the leak?



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DickD

11-27-2007 16:48:54




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 Re: Sleeve in a John Deere 70 in reply to andy r, 11-27-2007 15:37:06  
If you have to use a stop leak product, There is a product we have used very successfully called IRON TITE Most NAPA stores in our area stock it.



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andy r

11-27-2007 16:01:08




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 Re: Sleeve in a John Deere 70 in reply to andy r, 11-27-2007 15:37:06  
Yep .... the valves and seats were pretty good, but I did have them touched up. Shop also checked head for cracks. Everything is OK on the head. Thanks.



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teddy52food

11-27-2007 15:50:52




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 Re: Sleeve in a John Deere 70 in reply to andy r, 11-27-2007 15:37:06  
Before you put it back together you should take the valves out ,clean it up good and have the head magnafluxed to make sure it is not cracked. Also make sure it is flat or a new gasket may leak too.



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