As the engine casing and cooling jacket, the engine block is the central element of an engine. In the
As a central element of an internal combustion engine, alongside the cylinders, the engine block brings together the crankshaft bearing, and for water-cooled engines, the cooling jacket. The auxiliary units needed for the operation of the engine are also generally attached to the engine block.
Engine blocks are normally made from one cast part. Materials used usually include cast iron, spheroidal graphite iron, and lightweight metals (predominantly aluminium). For larger engines, the engine block is separated into two or more cast parts. In this case, the crankcase cylinders are most frequently produced separately.
The engine block has varied functions and tasks, such as
The lower part of the engine block in which the crankshaft runs is called the crankcase. Depending on the engine design, the crankcase also contains the camshaft and the oil pump.