Engine Truck Spare Parts YC6L Cylinder Block Assembly L4700-1002170CSF1-P for YUTONG Bus Parts

he L4700-1002170CSF1-P Dry Cylinder Liner is an original equipment (OE) dry-type cylinder sleeve designed for use with Yuchai YC4G and YC6G series diesel engines, particularly those with a 112 mm bore diameter. As a core component of the combustion chamber, it forms the cylindrical surface within which the piston reciprocates—directly influencing compression ratio, oil consumption, power output, and engine longevity.

Manufactured from high-boron alloy cast iron, this liner offers superior wear resistance, excellent thermal conductivity, and long-term dimensional stability under high-load operation. The "CSF1-P" designation indicates that it features laser-honed internal crosshatching with micro-textured oil retention pockets, a 2026-standard process that enhances lubrication distribution and reduces friction between the piston rings and cylinder wall.

As a dry liner, it does not directly contact coolant but instead transfers heat through interference fit into the surrounding cylinder block. Its installation requires extreme precision in terms of bore finish, press-fit tolerance, and height protrusion to ensure reliable sealing and optimal cooling performance.

Used across Yutong ZK6107/ZK6119, King Long XMQ6117, Higer KLQ6109 buses, as well as Liugong CLG835, SDLG LG936 loaders, this cylinder liner supports high-efficiency combustion and low emissions when properly installed and matched with compatible pistons and rings.