The original water pump assemble does not have bleeder screw. The new replacement water pump assemble comes with a new water outlet. The bleeder screw should be on top of the water outlet.
If you have an airlock condition, fill up the overflow container as much as you can while idling. Close the cap and drive the car for a while. Turn off the engine and check the water level after it is cool. Refill it and repeat steps above if necessary. In order to do this, the cooling system has to hold pressure first.
[This message has been edited by be459 (edited 09-10-1999).]