5.9 operating temperature

YY1 said

Thermostat only controls when the flow starts, has no effect on high end of operating temperature.

IE the LOWEST temp the engine should run at is the thermostat spec.

Common mistake.

Click to expand...

What does it mean if your temperature never reaches thermostat's rated temp? Besides the obvious thermostat not working correctly? New radiator and now temps stay around 160. Have not drove on very hot day yet though.