Answer to: Why pt cruiser overheatsIt's all in the bleeding. Follow these steps. 1. Work on cool engine 2. Drain overflow tank. Pull off hose at tank site. Use a throwaway cup to catch antifreeze. 3. Put overflow tank hose back after draining to add mark. 4. Open bleeder valve 10 mm and remove overflow hose at radiator end. 5. Slowly pour antifreeze into radiator. as it rises the antifreeze will start to "dribble" out the bleeder valve. Keep pouring till you get a steady stream. 6. Close bleeder valve replace overflow hose and start car leaving radiator cap off. Turn heat on high. 7. Add antifreeze till full only in radiator not overflow. Watch the bubbles about 1 to 2 minutes. Antifreeze is still flowing as the engine warms so 2 minutes was the longest. 8. Replace 16 pound radiator cap and go for a ride. If you have no major issues this will work. I've done it several times. Anytime you open the radiator you need to follow these steps.!!