What type of maintenance does main engine overhauling typically include?

Main engine overhauling typically involves a complete rebuilding of the engine. This comprehensive process ensures that all critical components are inspected, repaired, or replaced as necessary to restore the engine to its optimal operating condition. During an overhaul, technicians disassemble the engine and examine crucial parts such as pistons, crankshafts, and valves for wear and damage. This level of maintenance goes beyond simple repairs or minor adjustments; it is designed to extend the operational lifespan of the engine and improve its performance and reliability.

The nature of an overhaul demands a thorough approach, which separates it from other maintenance activities such as routine servicing, which might include cleaning and basic checks, or addressing minor wear and tear, which focuses on less significant issues. Replacing only the fuel injectors is also not characteristic of an overhaul since it represents a targeted repair rather than a comprehensive rebuild.