I just replaced the alternator and battery in my 90 Seville, but since I've started it up again the water pump (I believe), has started whistling a little bit. Should I be worried? How urgently should I think about replacing the water pump? So far it looks like it's not leaking, and the car is...

Pearl is a 03 Seville SLS and I love her. But she's falling apart faster than I can fix her. I just put on new rotors, calipers and brakes. I put new rubber all around. New overflow tank. A while back it was the harmonic balancer. Well now It's the altenator I'm pretty sure. drove home one...