OK. I'm really annoyed, and embarrassed, driving down the road with this damn bird chirping under my hood, for everyone around me to hear. First, I try a new tentioner pulley. Chirping stopped for a day, than came back. Than replaced the belt with a new one. Good for another day, than the little ***** came back once again. Last try was the idler pulley. Good, again, for a few miles, than, same result. Don't get me wrong , I like birds, and the sounds they make, just not under my hood. Any suggestions would be greatly appreciated.