Here's a Ford factory service bulletin on that subject. SERVICE LETTER
TRACTOR AND IMPLEMENT DIVISION
LETTER No. 2-T-11
TO: ALL DISTRICT OFFICES, PARTS DEPOTS AND DEALERS, ALL EXPORT COMPANIES
DATE July 29, 1952REPLACING STEEL SLEEVES WITH CAST IRON SLEEVES 9N, 2N, 8N TRACTOR
REBORING SPECIFICATIONS
The 8N tractor engine fitted with steel sleeves has a bore diameter of 3.2684" Min.
----- ----- Mean Diameter of 3.2685"
3.2687" Max. The steel sleeves have a mean wall thickness of .0375" and the cast iron sleeves have a mean wall thickness of .0897". The new bore for cast iron sleeves is
3.3657" Min.
----- ----- Mean Diameter of 3.366"
3.3665" Max. The amount of metal to be removed is
New Mean bore 3.3660
Old Mean bore 3.2685
Difference ----- .0975" When reboring the block, the following cutting depths are recommended. - First rough cut is 3.268" to 3.325". Metal Removed Approx. .057" - Second rough cut is 3.325" to 3.364". Metal Removed Approx. .039" - Finish cut is 3.364" to 3.366". Metal Removed Approx. .002" Total metal removed is .098" Before making the finish cut, it is advisable to check the diameter of the bore to ensure that .002" is the proper amount of metal to be removed to give a bore diameter of 3.366". After making the finish cut, the counter bore should be made to accommodate the lip of the sleeve. The counter bore diameter and depth are Diameter:
3.414” Min.
----- ----- Mean 3.415"
3.416" Max. Depth .063" to .066" The cast iron sleeve has an O.D. of 3.3670" Min. ----- ----- Mean 3.3674"
3.3678" Max. New bore mean diameter is 3.366" Press fit is .0014" The range of a press fit should be between .0005" and .0021". After the cast iron sleeves are installed, it will be found necessary in most cases to hone the sleeves to obtain the proper piston fit. Instructions for the procedure in fitting pistons in the cast iron sleeves will be issued in Service Letter 2-T-12.
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Got a Tisco sleeve and a good 4" mic handy???