John Deere H oversize block

[Otis Wolkins]

I have a 1941 John Deere H block that is rebored 0.090 oversize--I can find 0.090 rings but not the piston--can this block be resleeved back to original? I did find 0.090 pistons from Kuhns but they are domed and look like they are too long for the cylinder. Help!!

 

[NY 986]

I have a 1941 John Deere H block that is rebored 0.090 oversize--I can find 0.090 rings but not the piston--can this block be resleeved back to original? I did find 0.090 pistons from Kuhns but they are domed and look like they are too long for the cylinder. Help!!

In theory yes it can be resleeved. Just need to find the appropriate material for the sleeve and a shop to weld it into the block.

 

[Duner Wi]

Melling has repair sleeves in 3/32 or 1/8 inch wall thickness for 3 9/16 pistons. I don't know about the welding part, most repair sleeves are press fit. I sold my H years ago and am not up on the latest piston and cyl repairs

 

[buickanddeere]

Pullers have sleeved the H block out to take plain ordinary low cost stock pistons from a 40 or even a 420 iirc .

 

[Otis Wolkins]

Thanks for the replies---does anyone know where I could get 0.090 oversize pistons for my block as this seems to me to be my best way forward.

 

[NY 986]

Thanks for the replies---does anyone know where I could get 0.090 oversize pistons for my block as this seems to me to be my best way forward.

Try A & L Parts. Penn Yan, NY. 315-536-0543 M-F. They part out JD 2 cylinders and he has a barnful of new and used.

 

[Duner Wi]

This is old Sealed Power catalog. Be sure length is adequate.

 

[Duner Wi]

Melling website and look at PDF>

https://melling.com/wp-content/uploads/2025/05/2026-Cylinder-Sleeve-catalog_condensed-version-01212026_TOC.pdf

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