I'm having a problem with my a/c,seems that i'm only getting cold air out of the 4 vents on the passenger side.The others are blowing warm air.I imagine there is some sort of damper that controlls the air,but were?I also noticed a little rattleing sound coming from the s/c pulley,whats involved in changing the bearings in this area?The car is a 96 riv with a series 2 s/c. Any help would be great.Thanks DAVE