horseman with no horse 55 #1 Posted October 13 i got what is supposed to be a NOS k181 valve. it doesnt have the groove in the stem that others seem to have. does this look right?https://youtube.com/shorts/LIJq46q1Hbc Share this post Link to post Share on other sites
953 nut 62,151 #2 Posted October 13 It has the groove for the keepers. 1 Share this post Link to post Share on other sites
Wheelhorse#1 1,868 #3 Posted October 14 Looks fine to me. 1 Share this post Link to post Share on other sites
horseman with no horse 55 #4 Posted October 14 a picture @lynnmor sent showing the groove in question Share this post Link to post Share on other sites
horseman with no horse 55 #5 Posted October 14 "undercut" as they describe it Share this post Link to post Share on other sites
ri702bill 10,035 #6 Posted October 14 Measure the stem diameter with either a dial caliper or micrometer to see if it matches the Kohler spec. An as-supplied new valve is made too long to allow you to grind the end of the stem to achieve your desired valve clearance. Doing so, favor the high side of the tolerance, as the valve gets "hammered" into the seat after time and closes up the clearance gap. The end of the ground stem must be flat and perpendicular to the shank. 3 Share this post Link to post Share on other sites
