Master sea lion, please come in.

See if the water temperature can come up after a period of time. If not, check whether the thermostat is installed after overhaul. I changed the water temperature plug the day before yesterday, or it may be the water temperature plug.

Turning the key door starter doesn't respond, which should have nothing to do with repairing the engine the day before yesterday. First try to see if the headlights are on and the speakers are off, so as to eliminate the battery problem. If there is nothing wrong with the battery, check the circuit of the key door. Still no good, just see if there is any problem with the magnetic attraction of the starter ~