Cylinder liner for Mercedes-Benz OM421

The cylinder liner A4440110310 is a component for the Mercedes-Benz OM421 engine. It is inserted into the engine block to form the internal wall of the combustion chamber and provides the sliding surface for the piston movement. This part facilitates heat transfer from the piston and combustion gases to the engine cooling system while maintaining a seal to support compression.

This component is compatible with the Mercedes-Benz OM421 engine model. It is designed to meet the specific dimensional and functional requirements of this engine block to ensure proper fitment and operation.

In internal combustion engines, cylinder liners act as the primary interface between the reciprocating piston rings and the engine block. They are responsible for containing the high-pressure gases generated during the combustion cycle and managing the thermal load transferred from the piston assembly to the surrounding coolant passages. By providing a controlled surface for piston travel, the liner helps maintain engine compression and assists in oil control within the cylinder bore.