Why is the Volkswagen water pump leaking?

[DeAxel]

Automobile water pump sealing is inadequate. Below are the reasons and methods for checking water pump leakage: 1. The reason for excessive wear on the friction surface of the centrifugal pump mechanical seal is excessive spring force, excessive end face pressure, unclean sealing medium, and excessive spring compression. The solution for excessive wear on the friction surface of the centrifugal pump mechanical seal: replace the spring, add a filter, and adjust the spring. 2. The symptoms of vibration, overheating, smoke emission, leakage, and wear in the centrifugal pump mechanical seal are usually caused by excessive end face width, excessive end face pressure, rough dynamic and static ring surfaces, improper friction pair matching, poor cooling effect, deteriorated lubrication, and poor corrosion resistance and high-temperature durability of the end face. The solution for centrifugal pump mechanical seal leakage: reduce end face width, lower end face pressure, improve end face smoothness, replace the static ring, ensure proper pairing, enhance cooling measures, improve lubrication conditions, and replace the dynamic ring with corrosion-resistant and high-temperature durable materials. 3. The reason for intermittent leakage in the centrifugal pump mechanical seal is: excessive axial movement of the rotor, the dynamic ring cannot compensate for displacement in time, or unstable operation of the horizontal centrifugal pump itself and pressure fluctuations. The solution for intermittent leakage in the centrifugal pump mechanical seal: adjust axial movement and stabilize the pump's operating pressure.