4936226 Compatible QSB6.7 Cylinder Head

What does a compressor cylinder head do?

This cylinder head serves as the critical sealing component for the air brake compressor, sitting atop the cylinder block to enclose the compression chamber. Designed for heavy-duty performance, it houses the vital valve seats and internal air passages required for efficient air production and thermal management.

Engine compatibility and fitment

This component is compatible with Cummins engines, specifically designed for use in QSB6.7, ISB6.7, QSM11, ISC8.3, QSC8.3, QSL9, M11, N14, ISL, and ISM series engines. Using a high-quality replacement head allows workshop technicians to rebuild existing compressor units rather than replacing the entire assembly.

Installation and maintenance guidance

When performing maintenance, technicians should inspect the cylinder head surface and valve seats for signs of wear or carbon buildup. Ensuring proper torque during installation is vital to maintain a secure seal between the head and the cylinder block to prevent pressure leaks.

System performance and selection

Maintaining the integrity of the compression chamber through high-strength components helps prevent air output fluctuations and overheating in heavy commercial vehicle braking systems.

OE cross-reference

25 03 10 (Compressor Cylinder Head) is the equivalent of the Cummins OE number. This part directly replaces Cummins OE number 4936226.