Re: Engine Temp?

Posted by Owen_Dyneto On 2009/8/28 8:52:17

The thermostat opens fully at its specified threshold, but it cannot regulate how hot the coolant gets. A lower rated thermostat, in good working order, will NOT lower the ultimate operating temperature.

I guess I disagree, with reservations. A lower temperature thermostat can lower the operating temperature as long as the radiator/cooling system has the capacity to remove that amount of heat. The issue to consider is that at colder coolant temperatures the efficiency of the radiator is itself reduced, i.e. the higher the differential temperature between the coolant in the radiator and the surrounding air temperature, the more efficient the radiator becomes.