What Causes Water Pump Dripping?

1 Answers
NoahLee
07/29/25 11:54am
Water pump dripping is caused by: 1. Poor sealing; 2. Damaged sealing gasket; 3. Internal leakage in the heater. The working principle of an automotive water pump is: The engine drives the water pump bearing and impeller via the pulley, causing the coolant in the water pump to rotate along with the impeller. Under centrifugal force, the coolant is thrown toward the edge of the water pump housing, generating a certain pressure before flowing out through the outlet channel or hose. The center of the impeller experiences reduced pressure as the coolant is thrown outward, allowing coolant from the radiator to be drawn into the impeller through the hose due to the pressure difference between the pump inlet and the impeller center, thus achieving a reciprocating cycle of the coolant.
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