OM352
OM314
In an engine, the top of the cylinder is closed with a separate cast piece called the cylinder head. The cylinder head is bolted to the upper part of the cylinder block. This joint is covered by a head gasket. It consist of a combustion chambber, spark plugs, and sometimes valves.
In most engines, the cylinder head includes passages that deliver air and fuel to the cylinders, and which allow exhaust gas to exit. Most OEM(original equipment manufacturer) cylinder heads are made out of cast-iron. A cylinder head made of cast-iron is more durable and less expensive. However, cast-iron is heavy and provides a lesser efficiency in dissipating heat. For this reason, some manufacturers prefer using cylinder heads made of aluminum. These cylinder heads are much lighter than cast-iron cylinder heads. Performance cars and race cars commonly have aluminum cylinder heads. Nevertheless, Motive Auto is proffering cast-iron cylinder heads since the aluminum ones are less durable compared to the cast-iron. So our customers can see that cast-iron heads wear out much later than the heads that are made of aluminum.