I have a 2003 dodge Stratus r/t. When I start it after sitting awhile it has a loud noise in the front end. It kind of sounds like when you stick something in a fan or like a card in a bike tire. After i put it in gear and start driving, it isn't loud. You can still hear it a little when i hit the gas but then after I drive a little, it goes away. It won't do it on start up again until it sits a few hours. What could i t be??

 

Electric fan coming on and hitting something?