08 Volkswagen Bora disassembled the throttle and the water pipe leaked.

1, the axial movement of the water pump rotor is large, and the interference between the auxiliary seal and the shaft is large, so the moving ring cannot move flexibly on the shaft. When the pump turns and the static ring is worn, the water leakage caused by the displacement can not be compensated;

2. Insufficient lubricating oil on the sealing surface causes dry friction or roughness of the sealing end surface, which leads to water leakage of the water pump;

3. The rotor vibrates periodically. The reason is that the stator is misaligned with the upper and lower end covers, or the impeller is unbalanced with the main shaft, and cavitation or bearing damage (wear) will shorten the sealing life and cause leakage.

If the water pump leaks, you can go to the repair shop to repair it.

The water pump is one of the important parts of the vehicle, and there are many reasons for water leakage, so you can go to the 4S shop to replace it.