Cylinder Head

Cylinder Head Points : Cylinder Head The top of the cylinder is enclosed by a separate cast piece recognized as the cylinder head. The cylinder head is bolted to the top of the cylinder block. It contain combustion chamber. Spark plug and sometimes valves (in I and F-head) are mounted in it. It incorporate passages for the flow of cooling water.
The cylinder head is frequently made of gray iron and aluminum alloy. Aluminum has the advantages of lightness in weight and high heat conductivity. It is cast separately from the cylinder block so that it may be removed for cleaning carbon and grinding valves. To retain compression in the cylinder, a flat piece of gasket is placed between the cylinder head and the cylinder block. In certain cases, such as a racing car engine, a separate bead is not used. But a single piece of cylinder block and head is difficult and costlier to make, and the internal parts of the engine are not as accessible.