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Need a Little Help for a Friend !!!!!!!!!!!!!!!!!!

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BIG JOHN

01-12-2004 10:33:10




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The guy who does most of my tire work called me this morning with the following problem.

He bought a Super C last year and it was smoking so he though he should have a valve job done on it. He has it at the local Case dealer now and they have done the valve job but now they tell him that he needs to go deeper into it, and that someone has honed the cylinders out to far and that he needs new sleves, pistons and the whole 9 yards.

Am I having a senior moment thinking that they made oversized rings for just this purpose?? If there is such a thing around can someone tell me the part number and source.

He has already put new tires all around and with this mechanic bill he is really burried in this tractor.

Any help will really be appreciated.

THANKS

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sammy the RED

01-13-2004 02:00:23




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 Re: Need a Little Help for a Friend !!!!!!!!!!!!!! in reply to BIG JOHN, 01-12-2004 10:33:10  
It may be that the oversize rings have already been installed.



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RN

01-12-2004 16:44:47




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 Re: Need a Little Help for a Friend !!!!!!!!!!!!!! in reply to BIG JOHN, 01-12-2004 10:33:10  
Oversize rings? Possible- early 70's working in Illinois for jeep dealer and auto parts store with machining services. Machinist would sometimes do about .010 inch overbore cylinder, ridge ream, knurl piston skirt and install special 'service' ring- thicker outside diameter, sometimes chrome plated. Austin/english car engine parts book showed special top compression + size ring with outside bevel so no ridge reaming required- got for mechanic for Triumph Spitfire. Small engine shop did service rings for Kohler engine. These were special rings for certain engines/sizes only. Engine rebuilder shops would have catalogs that might have a 3inch + ,010 ring set that might fit, need to check cylinder for roundness, knurl piston skirt to reduce slap. This procedure was used when customer like a used car dealer wanted cheap fix or when old engine didn't have replacement oversize pistons available, or manufacturer expected to replace rings once on stock pistons as normal procedure-soft iron, thin rings as aircooled small engine or motorcyle- R50/2 BMW rider noted he did this when couldn't afford oversize piston set, had about 20,000 miles on ring job at the time of rally. RN.

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Digger

01-12-2004 16:35:29




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 Re: Need a Little Help for a Friend !!!!!!!!!!!!!! in reply to BIG JOHN, 01-12-2004 10:33:10  
I found out with my H is that you can stick the overbore rings on standard pistons with overbore sleeves in the tractor and it will run but it also smokes. The person that I bought my H from put overbore sleeves with standard pistons and overbore rings it ran but dont think you will like the results.



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Fred

01-12-2004 16:35:25




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 Re: Need a Little Help for a Friend !!!!!!!!!!!!!! in reply to BIG JOHN, 01-12-2004 10:33:10  
Back in the 60s you could buy rings for cars that were 5 to 10 thousandths over. They went on the old pistons for cars that smoked, but you didn't want to spend the money on it. I don't think they lasted a long time but you could get another 10 or 20 thousand miles out of it. I think that was a passing thing. So you may not be having a senior moment after all.



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rustyfarmall

01-12-2004 10:55:51




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 Re: Need a Little Help for a Friend !!!!!!!!!!!!!! in reply to BIG JOHN, 01-12-2004 10:33:10  
To my knowledge, there is no such thing as oversized rings. What you might be thinking of is oversized pistons, which would be used after reboring the cylinders in a worn engine, provided that engine did not use sleeves. In the case of the Farmall C, where cylinder sleeves are used, the common method is to replace both the sleeves and the pistons, they are sold as a set. The dealer is correct.



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Randy in NE

01-12-2004 10:44:48




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 Re: Need a Little Help for a Friend !!!!!!!!!!!!!! in reply to BIG JOHN, 01-12-2004 10:33:10  
Unless the rings were entirely worn down there should be nothing wrong with the pistons. The parts manual for my C does not show any oversized rings. I person might be able to give an autoparts store the specs and see if they can crosss them. But then if you are putting new sleeves and rings it it why not spend a little more and do it right? The engine is already tore down so the extra labor costs shouldn't amount to that much more.

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scotty

01-12-2004 10:43:46




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 Re: Need a Little Help for a Friend !!!!!!!!!!!!!! in reply to BIG JOHN, 01-12-2004 10:33:10  
Big John, Im thinking you can only have so much clearance between the piston and sleeve before you run into major problems! I may stand to be corrected on this but to much clearance is not good.

scotty



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Bill

01-12-2004 11:44:13




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 Re: Re: Need a Little Help for a Friend !!!!!!!!!! in reply to scotty, 01-12-2004 10:43:46  
Years ago ring expanders were made (a wave spring that went inside the ring). But the cyls. are probab;y egg shaped and your best bet is new pistons & sleaves



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