A sleeve from a diesel is typically induction hardened. This is done to prevent wear, your old sleeves from a gas engine like the Allis are wore out verry quick, they are made from soft grey iron.
The sleeves from a custom sleeve manufacturer are going to be made from a spun casting, they are either made from ductile or grey iron. Ductile is much better and only slightly more $$, it will depend on the length of the sleeves, how many they can make from a casting and how many you are ordering. But you can figure on $125 per hole by the time you have them in your hand, maybe more, maybe less.
Those John Deere sleeves are just fine, they will wear a long time and in a naturally aspirated gas engine they will hold up just fine. But don't take someone's advice by following minimum reccomondations for a custom made ductile iron sleeve, the John Deere will not have near the elasticity.
I'm pretty "resourcefull" on these old engines and use a lot of used liners from diesels, turned to size on mandrills and bore the block, but I don't try to get away with running them to thin or following minium thickness requirements for another totally different sleeve. When there's snow on the ground and I'm tinkering on one of the antique engines my time isn't worth to much, a few carbide inserts are cheap and used JD sleeves are free...... If I'm busy though and something needs to get done, then I have more money than time.
Do I know how thin you can go with them? No, that's going to depend on your rod ratio, how well you can fill the cylinders and timeing. You can't fill the cylinders to well on these antique engines, it's probably not going to run fast, but I'd stay around .125" for a min sleeve thickness as a matter of personal opinion backed by experience and others experiences and failures.
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JimD wrote:
