Hey guys, this is my first post on here and i really need your help.
I was driving home the other night and got stuck in traffic, after sitting for a little while i began to watch the temperature in the engine begin to increase. i pulled over and cooled her off (luckily it was 19 degrees outside). after that i had to get back home so i started her up and she was running cold for a bit so i kept my eye on the temp gauge the hole time. Now this is where is get screwy. When i am actually driving i have heat and the engine temp stays under the halfway mark as it normally did, however when i am sitting i lose my heat and the car begins to over heat. i have flushed the cooling system and changed the thermostat. i did a boiling water test with the old one and it opened as it was supposed to so i now know it wasnt bad. good thing its cheap. the top rad hose is warm after the engine is running but the bottom hose remains cold, so i know nothing is flowing correctly through there. i am so lost with what else to do. is it possible air is in there? i have been trying to burp the system but how do you know for sure if there is still air in there, i even jacked up the front end to help. thanks for your help in advance.