Fixed parts
Reciprocating internal combustion engine technology

The engine block, also known as the crankcase, is the engine's main component (figure 2).

Its main functions are as follows:

• contain cylinders ;

• support crankshaft, cylinder head, accessories... ;

• as a carrier for lubricating oil;

• serve as a support for cooling water (if such a cooling system is used).

To perform these functions, the engine block must :

• be rigid (otherwise risk of noise, sealing problems or mechanical losses);

• have sufficient thermal conductivity;

• be castable and machinable;

• be watertight (oil and water).

...