20464403 Volvo FH II Water Pump

What does a water pump do?

The water pump serves as a critical component within the engine cooling system, performing the vital function of circulating coolant between the engine block, cylinder head, and radiator. By maintaining a steady flow of coolant, this component prevents engine overheating and ensures stable operating temperatures during heavy-duty service cycles.

Vehicle and engine compatibility

This specific unit is designed for compatibility with Volvo FH II models, including variants such as 460 LNG, 420 LNG, 380, 480, 500, 460, 540, 420, 520, 440, and 400. It is also suitable for various FH series applications to ensure reliable performance across different engine configurations.

Installation and maintenance

For professional technicians and fleet managers, it is recommended to inspect the pump during routine belt or timing belt service. When replacing the unit, ensure that all mounting surfaces are clean and that the seals are correctly seated to prevent leaks from the shaft or housing.

Troubleshooting and inspection

Monitoring for symptoms such as coolant leakage from the weep hole or unusual bearing noise can help in identifying potential failures before they lead to engine overheating. Always verify fitment with the vehicle's engine code to ensure precise compatibility.

OE cross-reference

525.03.0021 (Water Pump Water Pumps) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 20464403.