The right hand exhaust opening rocker on the horizontal cylinder has a small flake, which is foreshadowing future problems. Zoomed into the area in question. Closeup of the flaking opening rocker. See my highly specialized top of stroke locating instrument? The right hand intake opening rocker on the vertical cylinder also appears to have some flaking occurring. Will be sending both opening rockers off to EMS . Exhaust Opening Rockers - Vertical Cylinder Intake Opening Rockers - Vertical Cylinder Summary of shims and rockers replaced. Eight closing shims and one opening shim. I was able to swap two two of the closing shims around and decrease the total number closing shims used from the shim to from eight to six along with one opening shim, cost $9.00 per shim. Two opening rockers exchanged at EMS, $69.95 each, plus shipping. $ 63.00 for nine shims $139.90 for two rockers $ 21.00 for shipping ================= $223.90