Ok kind people. I have finally gotten the air bled out of the system. Thanks for your guidance. Now at low (idle) rpm the temp is slowly climbing above the halfway point and heat is still not working optimally. I ran the rpm up to 2200 when the temp gauge had risen to the second notch above the halfway point and it immediately fell down to the notch below the halfway point. Heat began to be at best lukewarm. Ran it like this for around 3-4 minutes and temp started to climb back up. I let it get to the first notch above the halfway mark and ran the rpm's up to 2700 and it dropped the temp gauge right back down to the notch below the halfway mark. Heat was working much better. What would you guys say is the cause of this? I'm not showing any visible leaking but haven't inspected the weep hole on the water pump to see if that is leaking. Does this sound like water pump or thermostat? See my opening post for all that has been done on this unit. Again thanks for all your help.
