The sign of air in the car's water tank is actually that the antifreeze in the water tank has air resistance, which will prevent the coolant from circulating correctly. Imagine that after filling the antifreeze, it no longer circulates. the engine at normal pace, the high temperature alarm will always appear at the end, and you have not found the reason after checking for a long time. This is probably caused by too much air entering the water tank.
So how should the air be exhausted from the car's water tank? First, we start the vehicle and preheat it for 5-10 minutes. Once the cooling fan is turned on, the coolant will go down a little. Next, we fill in the coolant and close the water tank cap. However, this method can only treat. the symptoms but not the root cause.If you want to completely cure the air in the water tank, you must perform the correct operations the next time you replace the coolant. Here are the operation steps.
The first step is to open the engine compartment when the car is cold and check if there is enough coolant. There are upper and lower limit scales of MAX and MIN on the side of the coolant kettle. When the car is cold, add more when the fluid level is below the lower limit. side of the kettle;
The second step is to check the connections. Check the pipe for cracks or signs of leaks, focusing on checking the five-way pipe (so named because there are five of them). joints connecting various parts);
The third step is to drain the old antifreeze and clean it withclean water. The fluid channel allows clean water to flow continuously through the engine cooling system, then idle the car for 3-5 minutes to allow the water to circulate, and continue to inject clean water until the flowing water is clean;
Fourth step 1: In order to allow the antifreeze to flow quickly into the water tank , after draining the water for about 1 hour, add new antifreeze from the water pipe of the water tank (radiator). Add another bucket of antifreeze to the antifreeze tank until the antifreeze tank is almost full. After that, turn on the car for about 10 minutes. At this time, the cooling system has removed some of the air and the fluid level has dropped. Then add antifreeze until the capacity is between the two markings.
Hello professor, I am part of the Power Company of ChinaNational Heavy Duty Truck Group. I have been engaged in engine research and development for many years. Excessive water temperature can cause problems such as cylinder pulling and piston removal. and the piston ring sticks.
1. Check if there is too little cooling water in the water tank. Find the cause and eliminate it
2. Hose in the water tank. Once foreign bodies are found, the water tank should be removed, rinsed and cleaned repeatedly;
3. Check the working condition of the water pump, whether the belt slips or not. too loose and the water seal is leaking. If these conditions are found,
If necessary, they should be adjusted and replaced respectively;
Check if there is air in the. cooling system causing air blockage. If this is the case, the cause must be identified and eliminated;
5. Check if the ththermostat is broken. Check the method: Run the diesel engine at the specified thermostat opening temperature. and use your hands to feel the temperature difference between the outlet pipes before and after the thermostat where the cooling water circulates. If it is significant, it means that the thermostat is broken. If there is no change, the thermostat is operating normally. . If the cooling water temperature is always low and cannot reach the specified value, it means that the thermostat is normally open and has failed. NoteNote: Do not touch the water pipe with your hands;
6. The advance angle of the fuel supply is small and the fuel supply is late, which prolongs the afterburning period of the diesel engine and increases the heat load;
7, the cylinder bed is damaged, allowing high temperature gas to enter the voie seaworthy, replace the parts to be repaired
8 the diesel engine has been overloaded for a long time; ;
9. If the diesel engine is equipped with a silicone oil clutch, check if it is expired.
10. There are too many carbon deposits in the combustion chamber and the exhaust valve clearance is too large.
I tell you that a simple way is to remove the thermostat, plug the mouth of a thermos bottle under the thermostat (i.e. block the small circulation), then to check the small water pipe of the expansion tank. blocked?
I hope you can adopt it.