I have a 2008 SE with the 2.4l 4-cyl that rattles at idle with the A/C on and the trans in drive or park. I took the car to a shop and they replaced the serpentine belt, idle pullies and tensioner pulley. The rattling seemed to be coming from the tensioner pulley and they agreed that that's where it was coming from. The issue I'm having is that after replacing the parts it is still rattling, and the only way it can be made to stop is either with a little bit of gas raising it from idle, or if the mechanic uses a breaker bar and puts a little pressure on it. Anyone else experience this? The tensioner pulley was replaced twice to verify it wasn't a bad part our of the box, and it was also bought from a different store. First was from a local Car Quest and the other was bought from a local Napa. Anybody have any clues or ideas what's going on?