If you ever tried to get the locating dowels out of the Cummins main caps, you know that using a straight drift doesn’t work. The bolt holes are tighter on the opposite side of the dowel end. I made an expandable driver spud that allows the removal end to be expanded when in place behind the dowel. It only takes a slight press to push them right out without damaging them. The countersunk head screw expands the spud with only about 1/4 to 1/2 turn.
Ron Flood
Cedar Machine
North Branch, MN