ORIGINAL: mikeb0914

So i went to the dealership and had some people look at my engine noise. they said with out a doubt its the pullies, i replaced the idle/tension pulley and i still have that sound. i dont have any tools to move the belt and check if the sound stays with no belt, but know a few people that might. the guys who work on my car said when they took the belt off and ran it that the sound was still there. its just the sound is so pinpointed on the pulleys. it just sounds like there makin alot of noise and theres that rattling sound that speeds up as the throttle is opened. the rattling sound just sounds like its talkin back after a rev up, like on the way down. you hear it with the hood shut and out of the car, i hate to say it but the noise might be on the bottom end, what are the possibilities of whats wrong on the bottom end? Please help