21697342 Volvo FH16 D16E Overflow Valve

What does an overflow valve do?

The injector pump overflow valve is a critical component that regulates internal pump pressure by redirecting excess fuel back to the return line. This mechanism ensures that the injection pump maintains a constant pressure balance, which is vital for stable engine operation and efficient combustion cycles in heavy-duty engines.

Compatibility and fitment

This specific part is designed for Volvo FH16 trucks equipped with D16E engines. It serves as a reliable replacement to ensure the fuel system operates according to original equipment standards, maintaining the necessary pressure thresholds required for heavy commercial vehicle performance.

Installation and maintenance

When performing installation, technicians should verify the M10x1 thread size and ensure the valve is seated correctly to prevent pressure leaks. Proper maintenance of the overflow valve helps prevent common issues such as erratic idling or increased fuel consumption caused by pressure imbalances.

Troubleshooting guidance

Check the compatibility list to ensure this component meets the specific requirements of your engine series.

OE cross-reference

0103 064 (Injector Pump Overflow Valve) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 21697342.