1994 SLS. After reading a couple other posts on here I'm pretty sure I've got a bad water pump. Overheating message, no coolant loss, and when I start it up cold I believe I can hear a noise from the waterpump that subsides after a few minutes. Does this sound like a bad waterpump? If so, any tips on changing it and should I change anything else while I'm at it ? (belt, thermostat, tensioner, etc...) Thanks.