What must be done before overhauling a piston of main engine?

Before overhauling a piston of a main engine, it is essential to conduct a thorough inspection of the engine to assess the condition of the piston, cylinder, and associated components. Proper documentation and maintenance records should be reviewed to understand the engine’s history. Additionally, all necessary tools and replacement parts must be gathered, and the engine should be safely shut down, drained of fluids, and secured to prevent accidental operation during the overhaul process.