4089206 Compressor Cylinder Head for ISB Engines

This cylinder head is a critical service component that sits on top of an air brake compressor's cylinder block, sealing the compression chamber to ensure efficient air delivery. Built with high-strength components, it manages internal air passages and provides the necessary seats for inlet and discharge valves, directly governing the compressor's air output and operating temperature.

This specific part is designed for use in Cummins ISB engines. It is also compatible with other Cummins engine series such as ISX, QSB, QSX15, ISC, L, M, and N engines. This component allows workshop technicians to rebuild a compressor in place rather than replacing the entire unit.

When performing maintenance, technicians should inspect the valve seats and cooling cavities within the head to prevent air leakage or overheating. Proper installation ensures the compressor maintains stable pressure levels under sustained heavy commercial vehicle loads. Always verify fitment based on the specific compressor architecture used in the engine.

Consult your authorized distributor to ensure correct application for your specific engine configuration.

OE cross-reference

25 03 50 (Compressor Cylinder Head) is the equivalent of the Cummins OE number. This part directly replaces Cummins OE number 4089206.