Cylinder liner for Cummins

The cylinder liner, part number 3904165, functions as the internal sleeve for the engine block in Cummins power units. It provides a defined surface for the piston rings to travel against during the reciprocating motion of the engine cycle. By maintaining this interface, the component assists in preserving compression levels and managing oil consumption within the combustion chamber. It also acts as a thermal bridge, transferring heat away from the combustion process and friction points into the engine cooling system.

This component is engineered to meet the specific dimensional requirements for compatible Cummins engine applications. Proper fitment of this sleeve is necessary to ensure the piston assembly operates within the intended tolerances of the engine block. When installing this part, technicians should verify the bore size and seating depth to ensure alignment with the existing engine configuration.

Cylinder liners are used in internal combustion engines to form the cylinder wall. They are designed to be replaceable, allowing for the restoration of the cylinder bore surface without replacing the entire engine block. This allows for maintenance of the seal between the piston rings and the cylinder wall, which is necessary for efficient engine operation.