New to this forum. I recently obtained a slant six from a combine that I plan to use to run a Harvester chain saw on my log cutting machine. I ran a compression check on it today and 5 cylinders are 125 to 150 but number 1 cylinder is only showing 50 PSI so it's going to need some work. The problem is I have no idea what year it is, what displacement it is or any thing else about it. It has point ignition, 3 core plugs so I'm guessing its pretty old. Is there any way to identify it so I'll be able to get parts for it. In my younger days when I was a mechanic I worked on several of these slant sixes. Any help or info would be greatly appreciated. Here are a couple of pictures of it and my home made log cutting machine I intend to use it on. I tried to upload pictures but the upload timed out after about 5 minutes the file size is too big these are 480KB and it looks like the maximum they can be is 256 KB. I will see if there is any way to resize them.

Thank You, Dave Sr.

Look at the top of the block, where the head mounts on the front right corner. There is a flat facing up, machined surface with the block identification. Usually some code like 22. Also small hose from water pump to the bottom of the head. Short rubber hose, 170, 2-3 inch hose, it's a 225.

If you are windows based use the snipping tool to capture your image and save it.
Those re-sized images will allow uploading to the board.

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Hyper_pak

Thanks for the reply. The hose from the water pump to the head is 2 and 3/4" so it must be a 225. There is a machined area on front of the block below the head I sanded it off clean but no numbers on it. Maybe I'm not looking in the right place. How many changes have been made on the 225's over the years. What would I have to know about this engine to get the right parts such as rings, valves, and gaskets. I'll see if my son can get the pictures to upload when he gets home from work today he knows a whole lot more about computers than I do. Thanks for the info I really appreciate the help.

Thank You, Dave Sr.

If it has 3 core plugs on the driver side of the engine, it is a 67-down engine. You should be able to use pistons, rings, bearings, etc that would fit any cast iron (aluminum engines very rare - not yours) engine from the mid-late 60s. The usual year range/interchange is 1960-1976 for this block type and head parts and gaskets are good over this same range.

Pics would be nice to confirm...

Lou

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Home of Slant6-powered fun machines since 1988

Thanks Lou and hyper_pak for the replies. I will try getting the pictures uploaded tonight. Unless I find out different I'll just call it a 1964 that should be in the safe range for parts. As soon as I can find time I'll remove the valve cover back off the rocker arms on that cylinder and with the piston at the bottom of its stroke I'll run an air test to see if I can determine whether the problem is valves or rings or both.

Thank You, Dave Sr.

Slant six pictures. Here are a couple of pictures of the /6 these were taken when I first got it in the shop and a picture of my home built log cutting machine. My intentions are to replace the Stihl chainsaw I currently have on the cutter with the slant six mounted ahead of the axle with a drive shaft back to the new Harvester saw that I'm building with chain drive from the drive shaft to the saw. This will give me much more power, heavy .404 pitch chain and a longer bar so I can cut larger diameter or more logs at a time much faster. If you want to see details of how I built the machine you can check my thread on the Outdoor Power Equipment forum at Log cutting machine under Tree Work Equipment by Dave Sr. Thanks for the replies guys I'll probably have more questions after I decide how much of a rebuild I'm going to do on the /6.

Thank You, Dave Sr.

Looks like a 64-ish/era engine to me.

NOTE that you can often "cure" low compression simply by doing a valve lash adjustment. Tight valves will do this, and this can happen from valve seat recession or other wear processes. I have saved many an engine by doing this free procedure. Quick and dirty is to simply back off the rocker adjuster screws by 1/2 turn and do the comp test again. You might be happily surprised!

Lou

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Home of Slant6-powered fun machines since 1988

Thanks Lou, I'll definitely check that

Dave Sr.

'66-'67 to my eye, judging by the valve cover (min year '66) and the 3 freeze plugs (max year '67).
Agree! valve adjustment procedure

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