The normal engine coolant temperature range for most vehicles is between 195 and 220 degrees Fahrenheit (approx 90°C) . However, the ideal temperature range for your specific vehicle may vary depending on factors such as the thermostat setting, the concentration of the coolant, and the setting of the pressure cap. Its important to keep an eye on your engines temperature gauge to ensure that it stays within the normal range. If the temperature is too low, combustion may be too rich, and if its too high, the coolant can start to boil, reducing its ability to cool the engine and possibly causing damage to the engine and its components. If youre unsure about what temperature range is ideal for your vehicle, you can check the thermostat temperature listed in the parts catalog at your dealership or ask your local auto parts store what temperature thermostat your vehicle came stock with.