I have a 92 dodge caravan 3.3 152,000 miles

At the beginning of the summer i changed thermostat and radiator cap For some reason someone put a 13 psi but book calls for 16 psi so i switched it and coolant and ever since i notice that on a hot day or when i use the Air Condition when i shut the vehicle and pop the hood the Coolant in the overflow raises and sometimes boils and sometimes comes over. Is it normal for it to boil like that. Temp Guage always normal. Anyone have any input?

What's the coolant/water mix? AC puts stress on the radiator, so you might want to consider using more coolant.