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Farmall & IHC Tractors Discussion Forum
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engine serial numbers

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nspec

07-30-2007 16:56:19




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O.K., this may sound dumb, but here goes. I've got a very early super H, serial number 540J. The engine serial numbers are a little suspicious looking to be original. The serial number reads IBHM 6623 or 1BHM 6623 with the I or 1 looking like it is separate and added on slightly left of the rest.

Part number as best I can tell is 6695-BE or 8E.

Casting code is 9-9-X which matches rest of tractor.

And then the clincher - looks like its stamped 264, but could also be 265 or 285.

I know the super M is 264 ci, but it couldn't possibly fit, right? It looks too original except for the numbers. Only other clue I have is yellow paint under the red, and a hint of army green perhaps under that.

Any ideas??

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D Slater

07-30-2007 19:51:31




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 Re: engine serial numbers in reply to nspec, 07-30-2007 16:56:19  
6695 DE would be the cast # for a 152 block but with that date code it would have a lot higher serial # unless used in a low production tractor like a industrial. If the block has 164 on it that would be the correct size for a SH. As CNKS pointed out the engine prefix you gave is industrial though. Think I read somewhere that industrial W4 series tractors never change to SI4 even after some super parts were used on them. Very interesting if you find any answers I would like to here about it. Does the block have a fuel pump opening near carburetor with a plate covering it?

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CNKS

07-30-2007 17:45:30




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 Re: engine serial numbers in reply to nspec, 07-30-2007 16:56:19  
I can't explain the cu in designation, perhaps it means something else. BUT, IBHM is the prefix of the International I4, don't think there was a Super series of that, if there was the engine prefix would be C-164. So unless it has been upgraded your engine is a C152. A C264 will not fit without extensive modifications, which should be obvious. The yellow paint indicates industrial, and there were many military I4's that were green, also.

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nspec

07-30-2007 18:04:22




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 Re: engine serial numbers in reply to CNKS, 07-30-2007 17:45:30  
Thanks for the response. Are there any obvious visible differences to the exterior of the 152ci engine vs the 164? The numbers are very hard to read still, so I could be off somewhere with those. Is there a tip off with the size of the carburator or exhaust manifold or anything like that? I suppose that could be changed also.



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CNKS

07-31-2007 18:40:46




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 Re: engine serial numbers in reply to nspec, 07-30-2007 18:04:22  
None that I know of. However Dave Slater mentioned the fuel pump cover. The stationary power units and motor grader, etc versions did have fuel pumps, I believe, but they should have their own engine serial prefix. And, the original C152 engines did not have the displacement cast into the block. Thus, IH could have made the engine a C164 and left the I4 a non-super series, I suppose. One difference in the super vs standard series is a faster 3rd and 4th gear. But the I4 already had faster gears than the Super W4, that could be one reason it did not have the super designation. (This is all speculation) But, I don't see any way it could be a C264.

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D Slater

08-01-2007 05:16:29




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 Re: engine serial numbers in reply to CNKS, 07-31-2007 18:40:46  
CNKS, just some thoughts that cross my mind. Tractor serial # shows a gasoline model, but no mention of X1 on block. I know supers didn't use the X1 code but by his prefix the engine is not a super. If IH did use a 152 or 164 with left over 152 block casting code on side or mark it 164 why would they stamp a industrial code on block and use in a Farmall. If the I is realy a F for FBHM then the engine serial # is not high enough for a 52 date code H block. Biggest unknown for me is engine size on block since he indicates it has one. One thing unknown is if engine size and cast # are cast on block or stamped. When it comes to IH I learned not to say it never happened, but my opinion is non original engine.

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CNKS

08-01-2007 05:59:32




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 Re: engine serial numbers in reply to D Slater, 08-01-2007 05:16:29  
I don't disagree, and it IS a replacement engine of some sort -- however if he has the 164 or whatever cast in with a Industrial prefix, it makes little sense. Point is since there apparantly were no Super I4's, I wonder if IH just used a 164 block and left the serial prefix alone. But, they should have changed the part # -- so there are several red flags, and we will probably never know, unless someone actually has an original I4 built after the C164 came out. Hard telling what that engine came out of.

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