Well as stated after I turned off the car a 2004 neon 2.0 auto I think I heard a gurgling or bubbling noise. I checked the antifreeze later that day it is full, the car never ran hot and drove great. Am I crazy I was sitting in a parking lot for about 30 minutes with the a/c on waiting on a friend when this happened. Any help thanks

 

Probably a worn-out radiator cap.

 

never thought of that thanks I will pick one up

 

easy way to tell if its the cap.. feel the top radiator hose when engine is up to temp, see if its firm or not. If its squshey the cap isn't holding pressure. Another way to tell is when the engine is cold, squese top rad hose and if you can push coolant into resivore, cap is bad.