What defines an 'overhauled' engine?

An 'overhauled' engine is defined as one that has undergone extensive repairs to restore it to the manufacturer's specifications. This process typically involves disassembling the engine, inspecting each component for wear and damage, replacing or refurbishing parts as necessary, and then reassembling the engine.

The goal of an overhaul is to extend the engine's operational life and ensure it meets safety and performance standards set by the manufacturer. This can include replacing critical parts such as bearings, pistons, and valves, as well as performing any needed machine work on the engine block and cylinder heads.

The term 'overhauled' indicates a level of repair that goes beyond simple maintenance or minor fixes, focusing instead on restoring the engine to a reliable and efficient operational state. This level of detail differentiates it from newly manufactured engines, which are constructed from new materials, or engines that have merely received minor fixes or have not been significantly altered from their original state.