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Farmall & IHC Tractors Discussion Forum
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engine size

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LinemanFarmer

12-17-2006 15:37:46




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Hi Folks, I was looking though the parts catalog online here and didn't realize there are differnt engine sizes. I knew there was a high compression and low. I guess the question is, how can you tell what engine I guy could have? Also My father came out today and got to see the tractor for the first time, we studied the whole thing out (he has been farming and being his own mechanic forever it seems). It looks as if some one has done some overhauling on the tractor at least 500-1000 hours ago. The rod bearings look excellent and so does the piston pins. The Sleeves arn't in to bad of shape, I misjudge a little is what he said, not to bad of a groove, but the piston that I finally got out, we took the rings off and put them in the sleeve to find ring gap. IT WAS BAD! I don't know what its suppose to be, but it was almost a 1/4". I don't know if the rust ate all of that away, or what happend. We started guessing that who ever tore the engine down got the wrong rings. ??? But the sleeve that had the rust is surface rust. We knifed at it and found no pits, it looks like it can be honed out easily. If you would know where I can find the engine size and what the ring gap is or where I can find it and learn something id be happy to know. May just need rings and a valve job! "I Hope"

Thanks fellers Derek

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LinemanFarmer

12-17-2006 17:22:11




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 Re: engine size in reply to LinemanFarmer, 12-17-2006 15:37:46  
Thanks guys, that helps! Derek



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City-Boy McCoy

12-17-2006 16:03:23




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 Re: engine size in reply to LinemanFarmer, 12-17-2006 15:37:46  
Well, first, it would have helped if you had told us what model tractor you have. I know you have posted before, but this is a fast moving forum, and we hardly have time to go back and look up the other posts to see what model Farmall you are talking about.
mike



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LinemanFarmer

12-17-2006 16:08:57




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 Re: engine size in reply to City-Boy McCoy, 12-17-2006 16:03:23  
I apoligize, Its an M farmall and the year is 1947. Derek



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City-Boy McCoy

12-17-2006 16:44:45




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 Re: engine size in reply to LinemanFarmer, 12-17-2006 16:08:57  
Lineman:

All non-diesel M's had a 248 cubic inch engine. They had a bore of 3 7/8". If you measure your bore, you can tell if it has had the cubic inches increased to that of a Super M. The Super M had a larger bore of 4". The stroke for both was 5 1/4".

Some years the block will have the cubic inches embossed on it on the right side - roughly above the oil filter. Something like "C-248" or "C-264" will show. However, I looked at a 1947 M yesterday which had no cubic inch size shown on the outside. So, don't count on it. Hope this helps you.

mike

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CNKS

12-17-2006 17:18:13




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 Re: engine size in reply to City-Boy McCoy, 12-17-2006 16:44:45  
On the H and M, don't know about the C, the first engine in the series did not have the cu in designation cast into the block. The 2nd and later engines did. Thus on the M there is no C 248 cast in the block, but the SM engine does say C 264.



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City-Boy McCoy

12-17-2006 16:59:17




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 Re: engine size in reply to City-Boy McCoy, 12-17-2006 16:44:45  
I should have made myself more clear; the Super M has a 4" bore and will compute to 264 cubic inches. The regualar M with its standard bore of 3 7/8" is 248 cubic inches. Many aftermarket sleeve and piston kits for the M come with oversize components so that you end up with the larger size engine (264 cubic inches). Safe bet is to measure your bore.
mike



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