1. Thermostat malfunction: When the water temperature reaches a certain level, the thermostat should open the cooling water circulation valve. If the thermostat is damaged and cannot achieve this function, it will cause the temperature of the upper and outlet pipes to be too low, which will affect the normal operation of the water pump.
2. Cooling circulation water pump problem: If the cooling water pump is damaged or cannot work properly, it will cause the cooling water inside the engine to be unable to circulate effectively with the cooling water in the radiator, thereby affecting the water pump's suction capacity.
3. Belt drive failure: If the cooling water pump is driven by a belt, a loose or damaged belt can cause the water pump to run insufficiently, affecting the circulation of cooling water.
4. Coolant problem: When replacing the coolant, if air is mixed into the circulating water path, it will form air resistance, affecting the normal circulation of the coolant. In addition, failure to replace the dedicated coolant for a long time may lead to the accumulation of scale in the body, blocking the circulation channels.
5. Leakage problem: Damaged or improperly installed seals of water pumps or pipelines can cause air leakage, affecting the water pump's suction capacity.
The solutions include:
Check and replace the damaged thermostat.
Repair or replace the faulty cooling water pump.
Adjust or replace damaged belts.
Ensure that the air is completely expelled when replacing the coolant to avoid air blockage.
Check and repair the air leakage problem to ensure the sealing of the water pump and pipeline.
Through the above measures, the problem of diesel engine water pump not being filled with water can be effectively solved, ensuring the normal operation of the diesel engine.
