High quality Spare Parts JCB444 Piston 444 448 Piston Kit Piston With Pin Clip

Products Description

The piston is connected to the connecting rod through the piston pin. The pin allows the piston to rotate around the pin axis. The pin is kept in place in the piston by the pin retaining clip.

After the piston crown comes to ring belt (also called ring zone). Most of the pistons have three ring grooves, in which piston rings are mounted. The top ring is called the compression ring, the middle on is the scraper ring and the bottom one is the oil control ring. The compression ring needs to seal the combustion chamber in order to prevent the inside gases to escape into the engine block. The oil control ring scraps the oil from the cylinder wall, when the piston is on the power or exhaust stroke. The middle ring has a combined role of assuring compression in the cylinder and scrapping excess oil from the cylinder walls.