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Farmall & IHC Tractors Discussion Forum
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Engine number stamped on model H Block

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Richard Miller

02-11-2005 11:57:30




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I have aquired a 1949 model H which had a bad engine. The replacement engine I found is a 1950 per casting #. The cast in place serial # was ground off and the block is stamped with steel # stamps. The fuel mount has been machined out plus the dip stick is machined however both areas are blanked off. Any ideas. Thanks




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rpmcbsq

02-11-2005 15:08:20




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 Re: Engine number stamped on model H Block in reply to Richard Miller, 02-11-2005 11:57:30  
I guess I was not clear the orginal serial # was ground off and re stamped. Plus the fuel Pump mount is machined and tapped with a steel plate installed and a freeze type plug in the drilled hole for the dip stick. I was asking for any ideas as to why this one is different than the orginal.
Thanks, Richard



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CNKS

02-11-2005 17:41:35




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 Re: Engine number stamped on model H Block in reply to rpmcbsq, 02-11-2005 15:08:20  
The H does not have a fuel pump or a dipstick. The service manual has pictures of the power unit version, does not mention a fuel pump, but since these engines were sometimes fueled from a source other than their own fuel tanks it is certainly possible. Where is this fuel pump mount -- I am not sure you have an H engine, or if you do it may have an aftermarket modification. I don't know how you know the serial was ground off. The engine serial is under the # 1 spark plug. Do you see obvious grind marks? The power plant verisons should have engine serial number prefixes of UBHM or IUBHM. The IUBHM means the engine was originally an engine over axle version used in road graders, etc.

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DWV

02-11-2005 18:15:18




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 Re: Engine number stamped on model H Block in reply to CNKS, 02-11-2005 17:41:35  
CNKS,I had a power unit once that used H engine
48 or 49 model.It used fuel pump and dipstick.
Fuel pump mount is on side of block below carb.
Mount is not drilled on farmall H.But if its drilled a plate is bolted on block to cover hole
that goes across engine to camshaft.Rod is used in hole to work fuel pump if it is used.Think some
placement of power unit engines made it hard to get to petcocks was reason for dipstick.Not saying
all units used dipstick.Most replacement blocks are drilled for pump.All that i have saw are a later date code than his block though and no serial # was stamped on block.Always finding something i havent seen though.

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CNKS

02-11-2005 18:58:38




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 Re: Engine number stamped on model H Block in reply to DWV, 02-11-2005 18:15:18  
Thanks for the info, beginning to understand now. Lack of access to the petcocks must be the reason for the undrilled cast boss on the H and M blocks, my 41 H has that. My dad had either a U4 or U6 power plant used as an irrigation engine. It had a 200 gal or so gasoline tank set off away from the engine, so it had to have a fuel pump. Now I know also what the raised part of the cast under and to the rear of the carb is for. The serial number info I gave is in the H/4 series service manual, so I thought there should be both a chassis and engine serial. But I can see if it is a factory replacement block, as opposed to one out of another tractor, that it might be drilled for both dipstick and fuel pump, since IH would only have to have one set of replacement blocks, instead of undrilled ones for tractors, and drilled ones for the U series, and that at least the serial prefix might not be stamped. Still don't know why the serial was "ground off and restamped" though. Learn something everyday, which is why I read this forum.

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CNKS

02-11-2005 14:02:26




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 Re: Engine number stamped on model H Block in reply to Richard Miller, 02-11-2005 11:57:30  
As Guy says, it is simply a replacement engine. If you mean it has a cast place for a dipstick. but no opening, that is pretty standard. What is the prefix for the engine serial? I don't know what you mean by fuel mount.



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Guy Fay

02-11-2005 12:55:13




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 Re: Engine number stamped on model H Block in reply to Richard Miller, 02-11-2005 11:57:30  
There's no such thing as a cast in Serial number-ever, on anything, except possibly a porta potty. All serials (which are unique to that particular block) are stamped. If it's a pasts number that was ground off, this would be a replacement block.



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DWv

02-11-2005 14:36:53




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 Re: Engine number stamped on model H Block in reply to Guy Fay, 02-11-2005 12:55:13  
Think he is mixed up,I believed he was refering to block casting # being ground off which seems common with replacement blocks.If he will let us know whats stamped in, that will probably tell the story.



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CNKS

02-11-2005 19:13:37




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 Re: Engine number stamped on model H Block in reply to DWv, 02-11-2005 14:36:53  
You mean that IH made blocks for both new tractors and power units, each with different part numbers, and different serial prefixes. Then for replacement there was only one block but as a separate procedure they ground off the part number of the block for the power units AND the tractors, drilled the dipstick and fuel pump holes, and then stamped a new part number? That way they would only need to inventory one set of replacement blocks for everything, and simply cover the holes on the tractor models.

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DWV

02-11-2005 19:43:58




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 Re: Engine number stamped on model H Block in reply to CNKS, 02-11-2005 19:13:37  
Was trying to say most replacement blocks for 4-6
series engine that had a date code later than when tractors were produced were not stamped with serial #.For some reason a lot of them have casting # ground off and casting # hand stamped on.If the serial # is the one ground off on engine in question i suspect it was a block made during regular production to power unit specs or was a power unit engine.

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CNKS

02-11-2005 20:01:35




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 Re: Engine number stamped on model H Block in reply to DWV, 02-11-2005 19:43:58  
Could be that after they stopped making H/M blocks, or at least not as many of them, they did whatever was necessary to get the inventory sold, or to get a block to a customer. They probably ground off part numbers and or serial numbers and either did or did not restamp so that a power unit block number would not show up on a tractor, or vice versa -- don't guess it really matters. What I really learned was the reason for the places for the dipsticks and fuel pumps that are on I suppose, all H/M blocks--Thanks!

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Novel Idea Guy

02-11-2005 12:39:39




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 Re: Engine number stamped on model H Block in reply to Richard Miller, 02-11-2005 11:57:30  
Any ideas... For what?

You need to ask a question or present a problem.



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Novel Idea Guy

02-11-2005 12:39:38




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 Re: Engine number stamped on model H Block in reply to Richard Miller, 02-11-2005 11:57:30  
Any ideas... For what?

You need to ask a question or present a problem.



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DWV

02-11-2005 12:38:43




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 Re: Engine number stamped on model H Block in reply to Richard Miller, 02-11-2005 11:57:30  
IH replacement block or power unit or industrial.



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