20431151 Compatible Water Pump — Volvo

What does a water pump do?

A water pump serves as a critical component within the engine cooling system, acting as a centrifugal pump that circulates coolant between the engine block, cylinder head, and radiator. By maintaining constant fluid movement, it prevents engine overheating and ensures the motor operates at its ideal thermal equilibrium during long-haul transport or heavy-duty tasks.

Vehicle and engine compatibility

This specific water pump is designed for Volvo FH12 series vehicles, including models such as the FH 12/340, FH 12/380, FH 12/420, FH 12/500, FH 12/460, FH 12/390, and FH 12/430. It is specifically engineered to work with D12D engines, providing high-flow performance and durability for these heavy commercial vehicle applications.

Maintenance and inspection

To ensure optimal performance and prevent sudden failure, technicians should inspect the pump during routine belt service. Key indicators of wear include coolant leakage from the weep hole or unusual bearing noise. Replacing the unit during scheduled maintenance helps prevent more serious engine damage caused by overheating.

Troubleshooting guidance

Consult your authorized distributor for compatibility verification and installation guidance.

OE cross-reference

525.03.0003 (Water Pump Water Pumps) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 20431151.