arnie

good day i'm nu to all this, but very inresting read i've go galaxy v6 n whilest kicking the back side off it the pipe out the top of the head to the heater went bang and now what i can only assume is the heater matrix leaking cause i have a coolant smell and very wet steamy passanger side front window, why didn't the pressure cap let go?? think i'll invest in a new one but still don't understand how or why it happened..