Piston Rings

Piston rings are the circular rings that fitted between the piston and the liner. Also it has special materials such  as cast iron and etc. 

This part helps to seal the cylinder. So that all the water exits inside the dams are blocked by it. This part is improving heat transfer from the piston to the cylinder wall and keep the suitable amount of motor oil between pistons and cylinder walls. 

Pistons take an important part of the combustion process in combustion engines. Johnston Auto parts ensure the quality of all products that they manufacture in this company.