A Cummins cylinder head is a critical engine component that sits above the cylinders, enclosing the combustion chamber and housing the intake and exhaust valves, springs, and fuel injectors.
Key Functions & Features
· Combustion Control: Manages airflow, fuel delivery, and exhaust gas expulsion to optimize engine power and fuel efficiency.
· Cooling & Sealing: Contains internal passages for coolant and oil flow, working alongside the head gasket to maintain compression.
· Durability: Precision-engineered from heavy-duty cast iron or proprietary metallurgy to withstand extreme pressures and thermal stress.
Common Replacement Options
· New OEM / Aftermarket: Brand-new castings built to factory specifications, frequently upgraded with higher nickel content (common for models like the 5.9L/6.7L ISB) to resist cracking.
· Remanufactured (ReCon): Factory-restored components (often denoted with suffix codes like RX) cleaned, inspected, and tested to meet original performance standards at a lower cost.
