Fan

All cars have a fan to help cool the coolant as it passes through the radiator . On most cars, the fan is driven directly by the engine , usually via the generator drive belt. But this arrangement means that the fan always runs at the same speed as the engine. This has several disadvantages. Read more

Fitting an electric, thermostatically controlled fan in place of the mechanical, engine -driven type can save you fuel and allow you to regain engine power normally wasted in constantly driving the fan. Read more