In this video we teardown a BMW M62 4.4L V8 engine from a late 90's E39 5-series. This engine is an all aluminum design, featuring timing a timing chain powering dual overhead cams, with the intake having variable valve timing (VANOS).

Common issues with this engine is an under-designed cooling setup, burning and leaking oil and of course the VANOs system. This particular example suffered catastrophic failure internally due to oil and coolant mixing. The result is a milkshake which does not lubricate or cool critical engine components well and causes them to wear rapidly until meltdown. The connecting rod and main crankshaft bearings were chewed up, spun and missing, the piston head in cylinder #6 was completely destroyed and sitting in the oil pan, the timing chain had jumped timing, cylinder walls were scored, the timing chain guides were chewed up, and one valve was destroyed in the processes with damage to the head. This whole engine would not have been able to be saved, since its oil and cooling passages were full of the milkshake and completely clogged up, with metal and plastic bits splattered throughout the engine.

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