The cylinder head and cylinder block of an internal combustion engine are the main heat sinks. They are made of metal which has a high thermal conductivity, which means that it can transfer heat quickly. The heat from the combustion process is transferred to the cylinder head and cylinder block, and then dissipated to the surrounding air.
In addition to the cylinder head and cylinder block, other components of an internal combustion engine that act as heat sinks include the pistons, piston rings, and valves. These components are also made of metal with a high thermal conductivity, and they help to transfer heat away from the combustion chamber.
The use of heat sinks is essential for the proper operation of an internal combustion engine. Without heat sinks, the engine would overheat and eventually fail.
