Originally Posted by
latemodel21
Take the belt off and spin the SC pulley, if you get anything that sounds like what you have in the video, then there is probably a problem with the new bearing you installed (ie damaged during installation, etc). You can also spin (by hand) the supercharge side of the (pulley) clutch, this will let you spin the SC internals to further isolate the problem.
With the engine stationary I presume for safety sake.