I posted a while ago on this, and I tested some pulleys by hand with both belts off. I think I found the culprit. Below is the video. The pulley to the left of the water pump makes A LOT of buzzing when turning it by hand (when the camera tilts, the pulley is the one above the water pump [but not the tensioner]). I'm almost certain it'* the cause. The tensioner pulleys themselves seem fine. This pulley is just a stationary pulley for the outside belt. When I tested this this past weekend at Bill'* in the driveway, Toasty could hear the noise from inside the garage! AJ doesn't seem to think it'* the PS pump either.
Can I just replace this one pulley, and if so where can I find it? Cheap? Easy bolt on? I'll try searching in the meantime. Thanks!