Cylinder liner for Renault Trucks AE390

The cylinder liner, identified by part number 209WN22, functions as the internal sleeve within the engine block of the Renault Trucks AE390 diesel engine. It creates the primary combustion chamber wall, providing a controlled surface for the piston and its rings to travel during the compression and power strokes. This component is engineered to facilitate heat transfer from the combustion process to the engine cooling system while maintaining the necessary seal for compression.

This component is compatible with the Renault Trucks AE390 engine used in heavy-duty transport vehicles. It is installed directly into the engine block to define the cylinder bore dimensions. Proper installation ensures that the piston maintains a consistent fit, which is necessary for the engine to operate within its design parameters regarding combustion efficiency and oil control.

In internal combustion engines, cylinder liners act as a replaceable wear surface for the piston assembly. By housing the piston, the liner protects the engine block from direct contact with moving parts and combustion gases. When wear occurs, replacing the liner allows for the restoration of the cylinder geometry without the need to replace the entire engine block.