Waterpump failure signs:
INSTANT overheating (pegged red)
no heat via panels
no coolant flow..
Its a 98 so it has the old style, black impellar. (Prone to shattering...)
Replace the waterpump..
DO NOT ALLOW THE CAR TO OVERHEAT ANY MORE..
~$70 and 25 minutes of your time.
Thermostat replacement is recommended if the car has overheated ONCE since you replaced that as well.
Replace with only white impellar or metal impellar.
Ray