No, that's not where this goes. It's locallized hot areas, particularly exhaust valve area or heads over siamesed cylinders, and also might have castings and restrictions the water would sooner not go around. The engine won't always over heat since there's enough cooler areas to keep things from spiking or boiling over, but you can't know what over heated areas there are unless a tear down shows the wear or have some kind of thermal recording.
