Is it noisy only with the a/c on, or is it all the time?
If it is always noisy, the pulley bearing is probably shot.
My A/C doesn't work. Has a hole in condenser. Compressor makes a very loud clicking sound, especially when above idle, revving or driving. I'm assuming the clutch bearing is failing.
I'm afraid the thing will seize and break the belt. So I just bought a A/C bypass pulley.
Much cheaper than replacing the compressor,condenser and recharging it.
I'm just trying to keep my van going for a while, it's on it's last leg unfortunately.
Thanks for confirming that my compressor clutch bearing is failing.