alrite my question is, i use my cat as a daily driver so i drive everywhere in it. recently i have noticed that my radiator has been spittin coolant after longer drives. I have also noticed that it makes a sort of "groaning" sound a few seconds after i turn the car off. i popped my hood, turn the cat off, and heard the groaning coming from the top of the radiator where the excess coolant exit hose is...have any of you guys ever experienced this??