Which ECMS level is the most thorough teardown?

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When ECMS levels describe teardown depth, they measure how far you disassemble and how thoroughly you inspect and refurbish components. The most thorough option is overhaul/complete disassembly because it requires taking the entire engine apart, inspecting every part, measuring clearances with precision tools, replacing worn or damaged components, cleaning, reassembling to exact specifications, and performing functional tests. This level reveals hidden wear and internal issues that surface checks can miss since nothing is left unchecked inside.

General visual inspection is quick and surface-focused, looking at exterior or readily accessible areas. Detailed inspection goes beyond a surface look but still stops short of a full disassembly, examining more components than a visual check but not tearing the engine down completely. The remaining level covers a scope that isn’t aimed at a full teardown, so it doesn’t reach the same depth of inspection as an overhaul.