Does anyone know what this grinding noise might be on my 2007 Town and Country 3.3L? This noise is not present when the belt is removed. I've replaced the idler pulley, belt, and tensioner (because it broke when I was removing the belt).
Here is a link to the video on YouTube: Please ignore our turkey in the background, apparently, he disliked the noise also.

 

alternator water pump ac compressor put a long screw driver on each of the components see which one is louder

 

Thanks, it was the alternator!

 

vary common