Four tests. Four angles. Every result signed, dated, archived. Engines that fail are stripped for parts or recycled — never resold "as new" without proof.
Compression measures the pressure each cylinder generates on its power stroke. We take readings cold and hot, every cylinder, and compare. Variance above 8% between cylinders points to wear — worn rings, leaking valves, a tired bore — that we refuse to pass on.
Where compression stays silent, leak-down speaks. We pressurise each cylinder with dry air and measure how much escapes — and where. The sound betrays the leak: hissing through the intake (intake valve), through the exhaust (exhaust valve), through the oil filler (rings), or out of the radiator (head gasket).
A 4 mm rigid endoscope walks every combustion chamber and intake/exhaust port. We record HD video of cylinder walls, piston crowns, valve faces and seats. Two passes per chamber. Anything that looks wrong is opened up before the engine clears testing.
Oil remembers. We send a sample to a partner lab where ICP spectrometry identifies metallic particles, fuel dilution and water. The reading either confirms what the other three tests said — or contradicts them, which sends the engine back for inspection.
Engines that fail the protocol are stripped for parts or recycled. None is resold "as new" without proof of testing.
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