Method for manufacturing a cylinder unit for a cylinder piston combustion engine

A method of manufacturing an axially extending cylinder unit having a pair of opposite ends spaced apart in the axial direction thereof for a cylinder piston combustion engine, said cylinder unit comprising an internal cylindrical guiding face for a piston extending in the axial direction of the cylinder unit and at least one internal combustion space limiting face at one end of the cylinder unit and extending, at least partially, transversely of the axial direction of the cylinder unit and forming a combustion space, said method comprising the steps of

• (a) forming the cylinder unit as a lining unit (1) having a longitudinal axis corresponding to the axis of the cylinder unit by one of the forming operations selected from the group consisting of cold impact forming, hot impact forming, deep drawing, press molding and injection molding, said lining unit being a monolithic unit including a cylindrical liner sleeve (1a) produced in the forming step and forming said internal cylindrical guiding face and further forming said internal combustion space limiting face, said cylindrical internal guiding face and said internal combustion space limiting face produced in the forming step being ready for operation without further machining,
• and said method further comprising the step of
• (b) incorporating said lining unit (1) into a cylinder housing (8).