1994 325. Week ago I popped the hood for my weekly inspect and noticed coolant tank was low. Filled, over the past week I heard a slight screech like a loose belt when I would first start the car. This am turned the key and low coolant alert came on. Checked, filled, drove for 10 minutes looked under and slight drip. Jacked car up, looked around and I can not see where it is coming from but the drip is eventaully coming off of that sprocket looking thing behind the main pulley. Has anyone ever had a similar symptom. Water Pump?