20741620 Volvo VNL D13 Overflow Valve

What does an injector pump overflow valve do?

This injector pump overflow valve is a critical pressure control component that maintains the internal pressure balance of the fuel injection pump by redirecting excess fuel back to the return line. By regulating this flow, the component ensures consistent fuel delivery and engine stability during operation.

Vehicle and engine compatibility

This part is specifically engineered for Volvo VNL trucks equipped with D13 engines. It functions as a reliable replacement for maintaining proper fuel-system pressure in heavy commercial vehicle applications.

Installation and maintenance

To ensure correct installation, technicians should verify the M10x1 thread size and inspect the fuel return lines for any debris. Proper seating of the valve is essential to prevent pressure drops that could lead to irregular idling or decreased engine performance.

Troubleshooting and selection

Regular inspection of the fuel system components can help prevent sudden failures that affect engine power and fuel consumption efficiency.

OE cross-reference

0103 064 (Injector Pump Overflow Valve) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 20741620.