I will remove the oil cap tonight when my wife returns from work to see if it gets louder. Is it possible to lubricate the pullies and if so with what type of oil or grease?

99 CSVT Green/Tan # 84 of 2760 Built on Wednesday, September 30, 1998 15.376 @ 92.00 MPH Stock 75,000Km 96 Contour GL 2.5L V6 ATX 170,000Km