Assertion: engine overhaul | /r/CapableOf | replace piston rings
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text: I'm no mechanic, but from what I've read in my Hayne's Repair Manual, a complete engine overhaul involves replacing piston rings, reboring or honning cylinder walls, replacing pistons (if the cylinders are rebored), replacing main and connecting rod bearings, regriding the crankshaft to restore the journals (if needed), and restoring the valves.