As Andrewwynn pointed out, please pay attention to this detail if you haven't already - confirm the locking of the adjustment unit in its initial position before verifying or adjusting the N62 engine timing:
https://www.newtis.info/tisv2/a/en/e...mshaft/DpNVZpB

"Important!
When the engine is shut down, the inlet and exhaust adjustment unit is normally locked in its initial position.
The situation may arise in some individual cases where this initial position is not reached and the camshaft can continue to be rotated in the adjustment range of the adjustment unit.
In order to avoid incorrect timing adjustment, it is essential to check the locking of the adjustment unit and if necessary perform locking by rotating the camshafts".

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'05 E53 X5 4.4i, '97 E39 528, '07 E92 335i, '16 F86 X6M.