Since you didn't identify what engine you're working on, I'm going to assume it's the 56 235 in your sig line. That one has replaceable rod bearings. You could drop some rod caps off and inspect the bearings, and replace them if they're showing wear. Be sure to measure the crankshaft diameter with a micrometer and get the right size replacement bearings if you choose to change them, and use a torque wrench to tighten the rod nuts to the specified torque values.
Jerry
