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At what temperature does the Tiida thermostat open?

1 Answers

DelDakota

07/29/25 5:46pm

The Tiida thermostat opens at around 70-80 degrees Celsius. Below is its working principle: The thermostat operates by having refined paraffin in its temperature-sensitive body remain solid when the coolant temperature is below the specified value. The thermostat valve, under the action of a spring, closes the passage between the engine and the radiator, causing the coolant to return to the engine via the water pump, creating a small internal circulation within the engine. Below is an introduction to thermostat fault diagnosis: (1) Coolant temperature exceeds 110 degrees: Stop the engine and open the hood. Touch the upper coolant hose in the radiator; it should be very hot. Then touch the lower radiator hose; it should also be very hot. If there is a significant temperature difference between the upper and lower hoses, the thermostat is faulty. (2) If the engine does not reach normal operating temperature for a long time: Stop the engine and let it cool to ambient temperature. Restart the engine and drive until the dashboard temperature reaches around 70 degrees (not exceeding 80 degrees). Stop the engine and open the hood. Touch the upper and lower radiator hoses. If there is no temperature difference, the thermostat is faulty. (3) Using an infrared thermometer to test the thermostat: Aim the infrared thermometer at the thermostat housing to measure the temperature changes at the inlet and outlet. This can determine if the thermostat is opening. When the engine starts, the inlet temperature will rise, indicating the thermostat is closed. Once the temperature gauge reaches 70 degrees, measure the outlet temperature. If it suddenly increases and the temperature gauge shows above 80 degrees, the thermostat is opening and functioning normally. If there is no temperature change, the thermostat is malfunctioning and needs replacement.

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