What is the normal water temperature for a diesel engine?

1 Answers
MadelineRose
07/29/25 7:31pm
Diesel engines operate at much lower temperatures compared to gasoline engines due to their characteristics of long-term operation at low speeds and high torque. The normal water temperature ranges between 70°C and 95°C. However, the ideal temperature during normal driving is between 70°C and 80°C. If the temperature exceeds 90°C and remains high, it indicates abnormal engine operating conditions. When the engine temperature is too high, you can try removing the thermostat. The purpose of the thermostat is to continuously monitor the coolant temperature in the engine, maintaining the water temperature at an ideal range of around 80°C to 90°C, ensuring a good working temperature environment for the engine. The thermostat is located on the inlet pipe leading to the heat exchanger and plays a role in maintaining a constant water temperature. Additionally, you can clean and unclog the radiator and intercooler. Professional radiator cleaning agents can be used during the cleaning process. It is also important to check whether the electric fan is spinning fast enough and whether the water pump is damaged, as issues with the water circulation can significantly impact cooling efficiency.
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