Okay, I thought I had a spun bearing but upon further investigation it seems only to happen when the jackshaft pulley is spinning. So I had the accessory belt installed and disconnected the jackshaft pulley belt and the noise is gone, sounds normal. the noise is completely gone. Can the accessory bracket go bad or the jackshaft pulley?? I am running a bypass pulley for the ac. the noise is strong when the jackshaft is spinning and the blower spins freely when spun by hand. I am running MP tensioners and ruled out the idler tensioner with a swap to a stock one.