i have a 96 cavalier 2.2L, just recently changed radiator and thermostat, all new dex(orange) coolant in it. been having a problem with air getting in the coolant system since i bought the car. -been about 3 years now- ive bled the system multiple times and after that itll be good, after i drive around its good, once i park it for the day and get in the next day it has air in the cooling system again! is this my headgasket? no coolant in oil and no oil in coolant. when it starts to get over the normal running temp coolant starts to push out of my reservoir. someone told me it might be a cracked head but im not sure about that.