Originally Posted by Buickman104
[...The car also has a coolant related problem where I get the low coolant light on the car, when the coolant is at a sufficient level and the temperature readings are all normal, but when I turn the car off the coolant coming back to to resevior is boiling and making boiling sounds and steaming.
That could be a bad radiator cap. One of the reasons your only supposed to open them when cool is the sudden drop in pressure will also suddenly lower the boiling point and cause coolant inside the engine to suddenly boil.
It could also be a bad head gasket, they can bubble exhaust gases into the coolant ...
I hope its just the cap.