Quote Originally Posted by Gussie2000 View Post
I doubt the issue is water pump and/or timing belt.

Again,he says the coolant is going "somewhere" so my bet is head gaskets.

Do you have to refill the coolant ?
As an alternative...

Have your take a peek under the intake manifold with a flashlight, while the cooling system is under pressure...

There are more than a few leaky possibilities under there.