In the recent past, rains have been on the high side. Whenever there is rain, all places are wet and cool. However, this coolness does not necessarily transform into coolness of the vehicle engine. Very many vehicles have over- heating problems even during wet seasons.

While the cooling system today is more reliable, the main components of the cooling system have remained the same. A basic cooling system consists of liquid coolant being circulated through the engine. The circulation is to control the high temperatures in the engine as a result of the combustion.

Previously, engines used to be air cooled, but those are very few now and are to be found only in the Volkswagen, Deutz, and a few other vehicles. The modern motorcycle has not changed much, it is air cooled although a few are also water cooled. That is why we shall concentrate on the liquid cooling system.