Just an update...it's definitely the pump itself making the sound and it still did it even w/ the hose disconnected from the valve cover. Took the pump apart and all looks good. I loosened the belt a little and it seems to have gone away. Still seems to be working fine.


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax