A noise is coming from the front of the engine... Its louder than it normally sounds. At idle and at higher speeds. I recorded the noise and compared it with other Users who posted to youtube and claimed it was their alternator bearings... However I removed the alternator, spun it... feels fine to me.. I've also hand spun all the other pulleys, all seemed just fine... The fan pulley has a little forward/backward movement. I replaced both belts the year before... the belts have about 7K miles on them. What is causing the noise?