Whistle noise.....

Hello,

I have an 07 V6

So I've just replace my serpintine belt and recently found out that my ac system has a leak somewhere. My problem is that I have a whistle while under acceleration and and it's slightly noticable during idle. It does slightly silence when I recharge the system and the AC clutch finally engages. I am confused though since it didn't make this noise before I replaced the belt. It could be the idler or tension pulley. Anyone else have something like this before. I have ruled out any vaccum leaks and I can pinpoint the sount to the front of the engine where the belt and pulleys are. Any info or input helps. I'm sure it isn't a huge issue. It's just annoying as hell.

 

Does anyone come on here anymore?

 

Take a long screw driver and rather carefully with engine running place the tip on pulley bolts and have your ear on the handle, easy way to check for bad pulleys.