This worked for me after all was said and done.
Park the car on an incline with the front facing uphill
Open up the resevoir and leave cap off
Let car run until warmed up
Once warmed up, idle at 2000 rpm for a while
This allows any airlocks in the heater core to move through the system and "burp" the air out of the resevior.
Sunday, October 25th, 2009 AT 4:10 PM