21218878 Volvo B11R D11K Water Pump

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 and the radiator. By maintaining consistent fluid flow, it prevents engine overheating and protects internal components from thermal stress during heavy-duty operation.

Vehicle and engine compatibility

This part is specifically engineered for Volvo B11R trucks featuring D11K engines. It is also compatible with other heavy commercial vehicle engines found in various tractor units and buses. For precise fitment, always verify the engine code against the technical requirements of your specific vehicle.

Installation and maintenance

To ensure optimal performance, technicians should inspect the pump housing and impeller during routine maintenance. It is recommended to check for signs of coolant leakage or unusual bearing noise. For maximum reliability, this component should be replaced in conjunction with the timing belt or alternator belt service intervals.

Troubleshooting and service

Maintaining a stable cooling environment is essential for preventing costly engine failures in heavy commercial vehicles.

OE cross-reference

525.03.0006 (Water Pump Water Pumps) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 21218878.