Does the new energy engine cooling water pump need to be replaced regularly?

In the cylinder block of the new energy engine, there are multiple water channels for cooling water circulation, which are connected to the radiator (commonly known as the water tank) placed in the front of the car through water pipes to form a large water circulation system. On the upper water outlet of the engine, There is a consumption in the front, which is driven by the fan belt to pump out the hot water in the water channel of the engine block and pump in the cold water. There is also a thermostat next to the water pump. When the car is just started (cold car), it is not turned on, so that the cooling water does not pass through the water tank, but only circulates in the engine (commonly known as small circulation). When the temperature of the engine reaches 95 degrees or more When it is turned on, the hot water in the engine is pumped into the water tank, and the cold wind blows through the water tank when the car is moving forward, taking away the heat.

The belt drives the water pump bearing and the impeller to rotate, and the coolant in the engine cooling water pump is driven by the impeller to rotate together, and is thrown to the edge of the water pump casing under the action of centrifugal force, at the same time a certain pressure is generated, and then flows out from the water outlet or water pipe . The pressure at the center of the impeller decreases due to the coolant being thrown out, and the coolant in the water tank is sucked into the impeller through the water pipe under the action of the pressure difference between the pump inlet and the center of the impeller to realize the reciprocating circulation of the coolant.

The bearings that support the water pump shaft are lubricated with grease, so it is necessary to prevent the coolant from leaking into the grease to cause emulsification of the grease, and also to prevent the grease from leaking. The sealing measures for water pumps to prevent leakage include water seals and gaskets. The water seal dynamic sealing ring and the shaft are connected with the engine through the gasket, and support the moving parts such as bearings. There is also a drain hole on the water pump housing, which is located between the water seal and the bearing. Once the coolant leaks out, it indicates that the water seal has been damaged.

Anything can break, but water pumps are designed to be durable and generally do not need to be replaced regularly, but it is still necessary to check them regularly. After all, the water pump is the heart of the cooling system. If there is insufficient circulation capacity, it will directly affect the cooling system. With a car, it can be checked once every 60,000 kilometers.

From the perspective of the water pump itself, it is not easy to judge whether it is good or bad from the appearance. You can roughly judge whether the water pump is abnormal by looking at the state of the water tank. In the neutral position, open the water tank cover, fuel the car, and see if the water inside can form a vortex state. If the accelerator is increased, the vortex will flow more violently. There is also a thermostat next to the water pump. It is not turned on when the car is cold. You can wait for the water temperature to rise. When the electronic fan is working, the thermostat is turned on, and the vortex will change greatly with the throttle. If this is the case condition, the water pump is fine, if not, the water pump may not work and needs to be replaced.

Listening to the sound is also a method, but it requires certain experience. Comparing the normal sound and different noises, some people with sensitive ears can judge the abnormality of the water pump. For example, the bearing is broken, and the sound is often sharper. If the fixed link is loose, it will also cause abnormal sound.

More checks are usually on the outside of the water pump, such as whether the coolant is leaking, which is often caused by the aging of the seal ring, and generally has no maintenance value. If you see some water marks near the water pump, you should check for leaks. It can correspond to the liquid level of the coolant, whether it is lowered, if so, it needs to be replenished in time, and the leak should be repaired at the same time.

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