What kind of noise?
If its screeching already... look at the bottom of the pully's travel to see if it is in contact with the crank pully (beneath and to the right [looking down] of it) (while running).
Also: you can try to rock it front to back (engine off
) to see if there is any play... the bearing is pretty sealed up so I don't think spraying wd something on it would do much to releve the noise as a test.