Cylinder Head

A cylinder head is housing for the engine components such as the injector, the valves and the rocker arms. It is placed on top of the liner and the piston. The cylinder head has passages machined inside for the flow of air, water and the exhaust gases. It also has channels for lubricating oil. The cylinder is made of cast iron.

Aluminium cylinders are also used where better heat dissipation is required. Common defects in cylinder heads are cracks which can cause water leakage. Any drop in water level or pressure should be investigated. A gasket is placed between the cylinder head and the liner and the engine block, which needs to be periodically renewed.