What is the normal water temperature for a diesel engine?

1 Answers
XavierLee
07/29/25 10:41pm
Water temperature is optimal between 70-92 degrees Celsius. Thermostat operation: When the water temperature reaches 70-80°C: The thermostat is partially open, allowing coolant from the engine water passages to flow through the partially open thermostat space to the radiator side, achieving a semi-circulation state. When the water temperature reaches 80-92°C: (Note: Some models may vary, this applies to most common market models) The thermostat fully opens, enabling coolant from the engine water passages to flow through the fully open thermostat space to the radiator side in a complete circulation cycle, achieving true circulation. Optimal operating temperature: Through coolant flow and fan operation, engine heat is dissipated to maintain the best working temperature for the engine.
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