A/C Tensioner Pulley wheel Chirping!?

For the past few months, there has been a rather disturbing chirping noise coming from underneath the hood whenever I run the A/C. I ignored this noise for as long as I could, but recently, it's become rather embarrassing..for me anyway. When you pull up to someone on the streets, the last thing you want them to hear coming from under the hood of a performance car is an annoying chirping noise...plus it's a dead giveaway that you're using your A/C.

Anyway, within the past few days, I've narrowed down the location of the chirp. It's not the compressor (Thank god), but rather the Pulley Wheel on the belt tensioner.

I replaced both the belt and today the Pulley Wheel, yet the chirping persists. I was certain the wheel would fix the problem, but alas, it didn't.

What I can tell you though is that when I've had the car running, I can shoot some WD-40 into the back of the Pulley wheel, and the chirp instantly goes away. That's how I narrowed down the location. What I can't figure out is what's causing it. And what my next move should be. Clearly it's something in the Pulley wheel assembly, but I don't know what.

Any help would be appreciated!

New Wheel: http://natomessageboard.com/uploads/0000...wheel1.jpg

http://natomessageboard.com/uploads/0000...wheel2.jpg

There may not be enough clearance between the pulley and the tensioner. Try putting a thin washer between them to increase the clearance.

Wouldn't the Washer cause friction between the two surfaces once the Pulley is tightened down?

No. The washer goes between the bearing and the tensioner. The bearing is held tight by the bolt and the pulley rotates around it. I have noticed that some replacement pulleys do not have a wide enough center causing the pulley to rub on the tensioner when the bolt is tight, the washer provides the necessary clearance.