For most diesel vehicles, it is necessary to face the situation of high diesel water temperature. So what is the high water temperature treatment method of diesel engine? Now, let me share my experience with you.
Experience of high water temperature treatment of diesel engine
Diesel engines used in construction machinery generally have a high working temperature, and adding antifreeze can ensure its high boiling point and reduce the scale produced by the cooling system; If the cooling system has air not excluded, or the coolant is not replenished in time, it will lead to a decrease in cooling performance and an increase in coolant temperature. Remove air from the cooling system.
For example, the radiator of the water radiator of the diesel engine has a large area of lodging, and there is a plug between the radiator and the mud debris, which will prevent the dissipation of heat. Especially when the surface of the water radiator is stained with oil, the thermal conductivity of the sludge mixture formed by dust and oil is smaller than that of scale, which seriously hinders the heat dissipation effect. At this time, thin steel sheets (such as scrap saw blade) can be used to carefully put the heat sink back to the original position, restore the flat shape of the heat sink, and then clean with compressed air or water gun, such as heating the water and spraying after the cleaning liquid, the effect is better.
The water temperature gauge indicates something wrong. Including: water temperature sensor damage; Wiring or indicator failure, resulting in false alarm. At this time, a surface thermometer can be used to measure the temperature at the water temperature sensor and observe whether the water temperature indicator (warning light) is consistent with the actual temperature.
The information illegally crawled from experience
The diesel pump itself is damaged, the speed is too low, the scale and mud accumulation in the pump body is too much, and the path is narrow, which will reduce the coolant flow, reduce the heat dissipation performance, and increase the temperature of the diesel engine. Replace the water pump.
The function of the thermostat is to control the size cycle of the cooling system, and the valve of a well-working thermostat begins to open when it is about 85 ° C, and the valve is fully opened when it is about 105 ° C. The way to check the thermostat is to remove the thermostat, suspend it in a container with warm water, and erect a thermometer in the water (not directly touching the bottom of the container), and then heat it from the bottom of the container, observe the temperature of the thermostat valve when it begins to open and fully open, if it does not meet the above requirements or there is obvious damage, the thermostat should be replaced immediately.
If the cylinder pad is burned by high temperature gas, the high pressure gas will rush into the cooling system to make the coolant roll and boil. The way to determine whether the cylinder pad is burned is to turn off the diesel engine, wait for a moment, and then restart the diesel engine and increase the speed. Replace the cylinder gasket.