Some results after pulling the VP (pics attached, here's the video link: https://youtu.be/TvsD1p1DOV0

1. The ball bearings on the VP spin well and have zero drag/pitting.

--Is there another part of the VP that should be inspected/considered as the cause for the loud knock?

2. Looks like there is no trace of the VP gasket remaining on the mounting surface of either the VP or black, which I think would at least partially explain the heavy amount of buildup around the VP (I took about a 1" thick glob of buildup off the A/C Compressor.

--To that end, has anyone put a VP into a Ultrasonic Cleaner or is that advised against? I'm not familiar with the internals of the rest of the VP

Attached Thumbnails