cross-posting from e90:
trying to diagnose this sound coming from the engine.
the sound starts at about 5 seconds into the video, but almost 4 minutes after engine start.
https://photos.app.goo.gl/jLQ5aaecn4pUW5LL6
some relevant background info:
-had a serpentine belt failure in June
-removed belt pieces from pan and pickup
-replaced oil pan gasket
-installed a front main seal protective cover
-added oil accumulator with check valve
-no codes present in mhd