Just updating my own thread, lubrizol helped a tad bit with the noise but still bothered me.
It only reduced it faintly and you could still hear it in the car.
Just bit the bullet and ordered a reman bosch unit and swapped it out only because it's an easy job on the n62.
No more noise quiet as it can be.
I guess whatever seal internally fails it fails beyond repair and no lubricant can't bring it back to life.
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2005 Imola 4.8iS
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