ok so i replaced my water pump on a 2005 tahoe 43k..i know 43k and it goes out... anyway i still have lots of air in the rad cause my car is reading 210 and i know its not getting that hot that fast.. the only thing i can think is that when i put the thermo in i tightened it down too tight so it cant open..anyway my question is what is the best way to purge the air? I did it the ole fashion way by letting it run with no rad cap for a while then put cap on let it get to temp take cap off and add coolant as needed....any suggestions are greatly appreciatted