Alright guys, i think my AC Compressor is messed up, but AC Still works perfectly fine.... i have a loud hissing sound from it, but when AC is turned on, noise dissapears....
is it just the pulley?
has anyone had this problem before?

Thanx.

 

it is the pulley bearing....
http://forums.maxima.org/showthread.php?t=506182

if you can get the pulley off the compressor (without taking the compressor off the car), you can replace it for $30. otherwise you have to remove the compressor, which necessitates a complete evac/recharge + a new receiver/drier.

question - did you every do anything to your AC? such as put in one of those cans of R134?