At what engine coolant temperature does the alarm trigger?

1 Answers
GarrettLee
07/25/25 4:55am
Engine coolant temperature alarm triggers between 115 to 120 degrees Celsius. The temperature gauge scale ranges from 0 to 130 degrees, with the normal operating temperature at the central 90-degree mark. After vehicle startup, the coolant temperature rises rapidly until the needle reaches the central position, where it stabilizes. Generally, it's advisable to start driving when the temperature reaches this midpoint. The automobile radiator, also known as the heat exchanger, is a key engine component that dissipates heat. Coolant absorbs heat in the water jacket, releases it when flowing through the radiator, then returns to the water jacket to complete the temperature regulation cycle. When engine temperature rises excessively, the water pump circulates coolant repeatedly to lower engine temperature, thereby protecting the engine.
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