Bad water pump?

You are right....5 minutes of run time shouldnt kill a water pump.

My question IS:

Did you have coolant in the engine and radiator....up to the bottom of the thermostat, before start up?

If you forgot and cranked it and had not filled the radiator....the water/coolant may not have been at a pumpable level and it could have burned up the shaft seal....That is WHY waterpumps fail....shaft seal leakage....either from heat....or age.= weep hole leakage.

:read2: