There are two types of cooling systems:
(i) Air cooling system
In this type of cooling system, the heat, which is conducted to the outer parts of the engine, is radiated and
conducted away by the stream of air, which is obtained from the atmosphere. In order to have efficient
cooling by means of air, providing fins around the cylinder and cylinder head increases the contact area.
(ii) Water-cooling system.
It serves two purposes in the working of an engine:
a) It takes away the excessive heat generated in the engine and saves it from over heating.
b) It keeps the engine at working temperature for efficient and economical working.