3.0L M54 engine whirring noise

[rmr2122]

I recently finished a major engine service project on my 2006 E53 with 90k miles on a 3.0L M54 engine (oil filter housing gasket, coolant overhaul including pipes under intake and all hoses, DISA rebuild using GAS kit, installed GAS ccv kit and removed stock ccv, lower intake boot, cleaned throttle body and replaced gasket, cleaned idle control valve, idle control valve grommet, removed intake and replaced gasket, replaced tensioners, idler pulley, spark plugs, VANOS seals, valve cover gasket). It was a big project!

My engine is running like new! I loved this project and am excited to do it all again on a friend’s e53 in a couple months.

I’m attaching a video of my engine below and wanted to get your feedback on the high pitched whirring noise. It gets higher pitched but not louder when RPMs increase. I’ve watched a bunch of M54 videos on YouTube and I definitely hear this noise on other peoples engines, but I can’t decide if it’s a problem or not. Can you take a listen and let me know if this whirring noise is within normal bounds?

https://youtube.com/shorts/sBBemGyJ3_Q?feature=share

Thanks!