Chapter 21, Problem 1RQ

What is normal operating coolant temperature?

To determine

State the normal operating temperature of a coolant.

Explanation of Solution

A thermostat is referred as a temperature-controlled valve located at the engine coolant exit on most engines to control the minimum normal operating temperature. It is used to control the normal operating coolant temperature between high-temperature and low-temperature extremes.

The coolant temperature usually depends on the thermostat rating. The engines equipped with a $195°\text{F}$ thermostat have the normal operating coolant temperature between $195°\text{F}$ and $215°\text{F}$.