I have a rattling noise that is somewhat intermittent when in park but under load sounds like a box of marbles rattling around as heard in the video. I have checked every pulley.. replaced idler and tensioner..belt.. recently had timing belt replaced with pulleys and tensioners. No noise when engine on and serp belt removed. I took everything back apart and checked everything I could for the noise and I am at a loss. No play or noise in fan bracket or clutch when removed and spinning it by hand. Anyone have any insight on this?