Water pump hose loose from too much pressure or head crack?

Hello everyone please help me. I posted a thread saying the lower hose from the water pump is coming off. Back in july my radiator split, had it replaced jeep runs great. in the last few weeks my lower hose at the water pump is coming loose, is this a result of too much pressure.
I start the vehicle with the radiator cap off and after a few minutes the coolant rise up and starts to drip out. Do I have a small crack or leak in the head. Please help me, thanks for your input, john

 

Coolant will expand as it warms up, especially if you have beyond a 50-50 mix. You might want to do a compression test to check for a cracked head. Pressure in your cooling system will help it run cooler.

 

My suggestion to replace the radiator cap was a experienced way to address and see if excess pressure was an issue without explanation. Sorry for my being lazy.

Another thought - attach a cooling system pressure tester (rental or loaner) , observe a pressure rise as engine runs, a head gasket or a head issue would rise quickly unrelated to temp increase, it is noticeable. Also check for evidence of oil in coolant or coolant in oil... milkshake appearance,