Symptoms and causes of broken car water pump bearings

Symptoms of broken car water pump bearings

1. The damage of the water pump will weaken the cooling circulation capacity or even not circulate, and the phenomenon of "boiling" of the coolant will appear.

2. The engine is leaking near the water pump.

  Leaking coolant will leave traces of coolant color on the vent holes of the water pump, leading to symptoms such as high water temperature after lack of coolant.

3. Abnormal noise occurs in the water pump when the engine is working.

  The abnormal noise of the water pump may be caused by foreign matter inside or the bearing wear.

Secondly, check whether it is a mechanical failure of the pump itself. The common reasons are: the packing is too tight or the impeller and the pump body are jammed and blocked by debris; the pump shaft, bearing, and the leakage reducing ring are rusted; the pump shaft is severely bent, etc. Remedy: loosen the packing, dredge the water channel; disassemble the pump body to remove debris and rust; remove the pump shaft for correction or replace with a new pump shaft.

How to judge the car water pump is broken

One is that the water temperature is high. After eliminating other causes, you can determine whether it is a pump problem.

 The second is to look at the flow of liquid in the water tank when refueling. When refueling, the water will flow, which shows that the water pump is not a problem.

 Third, watch whether the pump is leaking, and listen to the abnormal noise of the pump. www. Qcwxjs.com

The function of the water pump is to pressurize the coolant to ensure its circulation in the cooling system and accelerate the heat dissipation. As a long-running device, the water pump will fail during use.

 To judge whether the car water pump is broken, first observe whether the water tank is short of water (remember, it must be a cold car to open the water tank cover), the natural temperature is high when the water is short;

Then, if you want to observe the water temperature, hit the car first, hold the throttle for a while, observe the water temperature gauge (usually not more than half of 70-90 degrees), if the water temperature continues to rise (for example, near the red line), use it if you can Touch the slightly larger water-saving pipe near the end of the water tank. If it is cooler and does not feel hot, it must be a problem with the cooling system! Also, make sure that the thermostat is in good condition and the cooling fan is working. Whether the water pump is damaged.

(1) Installation position of mechanical water pump

The mechanical water pump is driven by the engine crankshaft through the transmission belt, and its speed is proportional to the engine speed. The working method of mechanical water pump has advantages and disadvantages. When the engine is working under high-speed and heavy-load conditions, the engine generates a lot of heat, and the high speed of the water pump increases the circulating flow of the coolant, which can just improve the cooling capacity of the engine; when the engine is working under low-speed and heavy-load conditions For example, towing other vehicles or turning on the air conditioner, when the engine speed is low, the speed of the water pump is also low, which reduces the cooling capacity of the engine.