My 94 Eldorado Northstar has a chirping noise coming from the engine when it is idling. Also lately there is a whining sound coming from the front of the engine also. I thought it might be the water pump starting to go but someone I was talking to, who is fairly knowledgeable about engines says it was something about a pulley and the serpentine belt. When I asked if it was just an adjustment, he smiled and said (afraid not). Sounds ominous. I know this isn't much information but does anyone have any ideas as to what he was talking about?