26 13 21 Compressor Cylinder Head for Detroit Diesel

What does a compressor cylinder head do?

This compressor cylinder head serves as the critical cast component that seals the top of the air brake compressor's cylinder block. By providing the necessary seats for inlet and discharge valves, it maintains compression chamber integrity and manages heat dissipation during operation. This part allows workshop technicians to rebuild compressors in place, offering a cost-effective alternative to complete unit replacement.

Compatible engines and vehicles

This component is compatible with Detroit Diesel engines, specifically the DD13, DD15, and DD16 series. It is widely used in heavy commercial vehicles including Freightliner models such as Cascadia, Coronado, and Columbia, as well as Western Star trucks like the 57X, 4900, and 47X. It is also fitted to Mercedes-Benz vehicles.

Installation and maintenance

When performing installation, ensure that the sealing face is perfectly clean to prevent gasket leaks. Because torque and tolerance values vary by compressor architecture, always refer to the specific service manual for the engine model. Proper alignment of the bolt hole pattern and port threads is essential for maintaining system pressure and preventing air leaks under high load.

Selection guidance

Check the compatibility list.