M52 Vanos scraping?

I think I may have installed the new Vanos seals correctly. Today for the first time I heard the noise in the video.



At the time car is running up-to temperature on oil and coolant.



Notice the noise is not on every revolution of the engine.



http://ift.tt/1j8Xcxw



I'm hoping I just made a mistake and have not killed the Vanos unit (indeed if it is the Vanos)