I have a 2003 PT Cruiser. Recently, while stopped for gas, I heard a loud hiss under the front of my PT and saw a cloud of steam shoot out near the front. I opened the hood and checked for a hose leak and checked the water level and all seemed well. Does the PT have a pressure relief valve?
AC system pressure relief maybe, check that you AC fan is running.
Make sure your coolant recovery hose is attached to the overflow tank.
It's normal for the pressure in the radiator to relieve when the rengine is stopped and the heat soak cycle starts but it shouldn't be visible, it should be conatained.
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