My ex's car wouldn't start today, so came over to check it out. The car would begin to fire, but would die before it ever ran. Checked spark, checked fuel, both good. Then I noticed that the upper radiator hose was rock hard with pressure even though the car hasn't run all day. From my knowledge and experience, I believe that the cooling system only has pressure when hot, which means the source of pressure would most likely be one or more of the combustion chambers. Hence, the headgasket is bad. I took the radiator cap off after releasing the pressure, and when she turned the car over, it would spew coolant out when it started to fire and died. Head gasket for sure???