21941086 Compatible Water Pump — Volvo FMX

What does a water pump do?

This water pump serves as a critical component in the engine cooling system, ensuring the continuous circulation of coolant between the engine block, cylinder head, and radiator. By maintaining consistent thermal management, it helps prevent engine overheating during intensive heavy commercial vehicle operations.

Vehicle and engine compatibility

This specific unit is engineered for Volvo FMX trucks equipped with D13K engines. It functions as a centrifugal-type pump that remains engaged as long as the engine is running, providing the necessary flow to protect the engine components from thermal stress.

Installation and maintenance guidance

For optimal performance and longevity, technicians should inspect the pump and its associated belts during routine maintenance. It is recommended to check for common failure indicators such as coolant leakage from the weep hole or unusual bearing noise. When replacing this component, ensure all seals and gaskets are correctly seated to maintain system integrity.

Troubleshooting and selection

Proper selection ensures compatibility with the existing cooling architecture of the vehicle's engine. Consult your authorized distributor to verify exact fitment for your specific chassis requirements.

OE cross-reference

525.03.0016 (Water Pump Water Pumps) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 21941086.