The Circuit coolant temperature result shows the temperature of the coolant inside the cooling circuit.
The Cool analysis log contains the change in coolant temperature from coolant-in to coolant-out. If the increase is unacceptable, (greater than 2–3°C), use the circuit coolant temperature result to determine where the greatest increase in temperature occurs.
In parallel circuits, even though the final increase in coolant temperature from coolant-in to coolant-out is small, the coolant may have reached a high temperature in some sections of the cooling channels.
When this occurs, the end temperature is not the maximum coolant temperature; therefore, you should always look at the circuit coolant temperature result in parallel circuits.