Cylinder liners are created to be as an intermediate layer between piston and engine block to prevent wear and to create cooling. Since it is a non-fixed part, it can be repaired and replaced easily. It is a very essential part of the engine. The honing marks inside the liner holds and carries the oil on the liner walls so that the piston skirt and piston rings are working the oil film with less wear effects. Since the liner’s honing marks are important to have this oil film, Matra offers honing in workshop or insitu.