Use caution when removing the rod bolts. The way the rod bolt is made creates a window that may contain shot-peening material. Years ago, I was removing the bolts from a set of SD rods and had trouble getting a couple of bolts out. I initially thought they just had a tighter press fit. However, after getting the rod bolts out, I realized what was going on. Apparently, there were a few small pieces of steel shot from the shot peening process that had gotten into this "window" on the connecting rod.
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