All of my remaining 17 brain cells agreed that they have never seen the new-style Mahle pistons in a JD specific K532 that had not otherwise been rebuilt with a new piston. Indeed, the Kohler parts manual does not show Mahle pistons being used in any K532. Mahle K301 (Magnum 12) pistons should work as replacements in the K532. As you know, new-style Mahle pistons were used in most K582 engines, although the Kohler full-skirted pistons were used in some.
THANKS, Harold & Josh; that is what I suspected, but I wasn't sure.
While we are on the subject; I thought I saw a post on here by Harold, that the old style rods can be machined to fit the forged pistons? later, J.Z.M.
Yes, the only difference between old style and new style K532/K582 rods is that the piston end is planed down for the new style rod to fit into the Mahle piston. At the piston end the old style is 1.205" thick and the new style is 1.035". There is no rod-to-piston side clearance spec, and so the rod does not not need to be planed to exactly my 1.035" measurement--just plane the same amount from each side of the rod.
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