So I have own a 2005 Turbo Limit Edition PT Cruiser, it is my work car, but I love it. Lately I took it for an oil change and was told that I need to replace the valve cover gasket. I will be getting that done in the next few days. I noticed that when I get turn the vehicle off I hear bubbling from engine coolant by the over flow tank. It does not over heat at all, but thinking I may have a head gasket issue. Has anyone else had this issue, if so what was your diagnoses. HELP!!!!!