With thinwall sleeves 3-7/16 bore is the most you can go on a regular H block without machine work. If you want to run sleeves the next step with machine work is 3-9/16 bore thinwall SH sleeve and piston set. The block doesn't have to be bored as much with that set compared to the 300, 350 thinwall 3-5/8 ID sleeves. If you run the pistons on the block without sleeves, sometimes some 3-9/16 pistons can be fitted, or the block can be sized for 3-5/8 pistons. If you have a good block casting most all the above will work. If not get ready for more machine work or finding another block. If your tractor is a early one I would pass on boreing it. If you get 3-5/8 pistons, most if not all now have the small piston pin. You would need adapter bushings in your connecting rods to use. some 3-9/16 have the small pin also. Just my opinion when using 3-5/8 pistons and the block bore castings look good. I go for opening the bore roughly 1/16 and running on yhe block. If you wear that out it can be bored for the sleeve then. Know a few that farmed running pistons in block and they lasted good.
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Today's Featured Article - Women and Tractors - Tractor Engine Repair - by Teri Burkholder. One of the great things about working on a tractor engine with your other half is that you know what he is thinking of at all times and can anticipate his every move and his next thought of what he will do. With Ben, anyway, I can tell! He'll be busy working and I’m handing him tools and he says, "give me that..." and I’ve already got it in his hand or "hand me that....."and I’ve got the portable light right where he needed it placed to see. "Run in the house and get me a...."as I open th
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