The piston and liner are essential components in internal combustion engines, driving the mechanical motion that propels vehicles. The piston, a cylindrical part, moves within the cylinder liner, generating power. Working in tandem, they convert fuel energy into mechanical force. The piston compresses the air-fuel mixture, ignited by a spark plug, creating an explosive force that propels the piston downward, turning the crankshaft and generating power. The liner, fitted within the engine block, provides a smooth surface for the piston to slide against, dissipating heat and reducing friction. This dynamic partnership ensures efficient engine operation and facilitates the smooth conversion of fuel energy into motion.