Bad tensioner pulley?, Alternator noise Options

[senick]

So I'm getting a noise from the alternator (pretty sure), and I haven't been able to solve it. My first thought was a loose belt, but checking the tension just by pressing down on it I think the tension is fine. It deflects maybe 1/2 inch if I really press hard. The alternator itself seems fine. I ran the engine with the battery disconnected, turned on the A/C at high, turned on the headlights and radio and gave it a good amount of throttle with no problems at all.
The noise is a squealing noise. It's not present when I first turn on the car, but starts up after the engine has warmed a bit. It gets louder with higher RPMs, and goes away for a second when shifting up. The car drives fine, but I'd really like to get this solved. The belts are only about a year old, and look fine.

[xrav22]

That is a problem try getting engine clean or gunk and go to the carwash spray it on let it set 3 minutes and give a few shots on the pullys and the buildup point. I never power wash my engines because the water gets into places water should not be in and rusts. Anyways you can try snugging up the valve cover bolts with a large metric socket.