How long does the thermostat open when the diesel engine is started?

Turn on the thermostat in winter 10 to 20 minutes. It is also called a thermostat. This is a valve that controls the flow path of coolant. It is an automatic temperature regulating device, which contains a temperature sensing element, and opens and closes the flow of air, gas or liquid through thermal expansion or contraction. The function of the thermostat is to automatically adjust the amount of water entering the radiator according to the temperature of cooling water, and change the circulating range of water, so as to adjust the cooling capacity of the cooling system and ensure the engine to work in a suitable temperature range. The reasons why the thermostat is broken are: the temperature of valve opening and full opening is too high; When the warm-up time is prolonged and the water temperature is low, the combustion gas and water condensed on the cylinder wall form acidic substances to corrode the cylinder.