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Restoration & Repair Tips Board

Measuring for bearings

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WillinSoTex

08-04-2006 14:55:04




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Anyone have an advice on measuring connecting rod bearings on a Farmall B, C113 engine?
Working on one that is a different kettle of fish. Opened the head and found the pistons marked 1,3,3,4-guess someones been here before.
Thanks, Will




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El Toro

08-10-2006 09:13:52




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 Re: Measuring for bearings in reply to WillinSoTex, 08-04-2006 14:55:04  
Take the crankshaft to an auto machine shop and and have them measure it. They can determine if the shaft only needs to polished or needs to be ground undersize. I would put a new sleeve and piston kit in it too. The machine shop can furnish your rod and main bearings too. Hal



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dr.sportster

08-05-2006 07:53:25




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 Re: Measuring for bearings in reply to WillinSoTex, 08-04-2006 14:55:04  
A manual would be a must for an engine rebuild and you will find alot of[maybe not all]the info needed.



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Bob

08-05-2006 00:10:32




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 Re: Measuring for bearings in reply to WillinSoTex, 08-04-2006 14:55:04  
Did you look at the old bearings for size markings?

Was there a bearing/oil pressure problem before you began tearing it down?

Down you have the tools and ability to "mic" the crank journals and check them for size, compared to OEM "specs", and "out of round"?

Why does having the pistons marked make the engine a "different kettle of fish"? Whats's the big deal with that????



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JMS/MN

08-06-2006 08:29:21




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 Re: Measuring for bearings in reply to Bob, 08-05-2006 00:10:32  
If they were REALLY marked 1,3,3,4- I guess I'd wonder just what kind of work was done inside. lol



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Bob

08-06-2006 10:30:12




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 Re: Measuring for bearings in reply to JMS/MN, 08-06-2006 08:29:21  
I've seen a lot of stranger things!

Someone may have replaced a bad #2 piston with a used piston from another engine, marked #3.

No big deal.

At least he didn't open 'er up and find a piece of shoe leather for a bearing insert, or a piston and rod removed altogether, because of a ruined crank journal!



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JMS/MN

08-07-2006 16:08:03




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 Re: Measuring for bearings in reply to Bob, 08-06-2006 10:30:12  
Just for my own sanity- what's left of it- I'd mark it with 5. Now, that leather strap thing- my mother was accused of doing an overhaul like that on a Model T by the feed dealer when he did a 'roadside assist' while she was on her way to town in the late 40s.



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