[Joe Bob]

The engine circulates to operating temp and the internal t-stat is supposed to open....if it doesn't open until 240+ then that's what everything is and stays that way.....the internal t-stat is the master controller (Tron). It will come back a little cooler depending on the downstream lines and trombone in this case.

Just because the external t-stat is working doesn't mean it will effect (affect?) the engine operating temp. Clear?