I've only been wrenching for 50 yrs so this should be easy for me. Did timing belt, water pump, etc. Car was fine but for a water pump leak. All back together and I cant get the bottom hose hot. Thermostat isnt opening my guess. I've put a known good one in and another. Everything is fine with no thermostat, good circulation, etc.
I've burped it to the best of my ability. Pulled a heater hose, pulled the throttle body hose. There is no air in the system. Thermostat is inserted into the block, tit out.
Not head gaskets, car was perfect before I apparently borked it.
What in the world am I missing??