LIFTER BORE CHAMFER TOOL
After enlarging lifter bores I was searching for an easy way to remove the sharp edge and put a small chamfer on the top and bottom of the bore. I machined up 2 pieces of 1″ aluminum to accept my Sioux valve grinding stones. I made a short one to do the top. The second one I made fits through the lifter bore and the stone screws on from the underside. Use a 1″ stone and dress a 70 deg angle on it. A few turns by hand will deburr the hole and put a .015 or so chamfer on it.

Keith Starner
K-Star Automotive
York PA
June, 2020