I noticed that after I sent my car to the painter the radiator has been giving me problems. Yesterday when I started the car, after 10 minutes of idling the over flow tube (i don't have a tank so it just spills off the the side) Just started spitting out hot air like no other, non stop until i turned off the car and continued for a minute after. Before paint the car was perfect, except the carb stayed open when the car was turned off, and the carb was rebuilt (not by me). Even after the carb was rebuilt the radiator was fine. The car sat there for 5 months... Any ideas?