Crankcase Ventilation: PCV means positive crankcase ventilation. Air from carburator air is drawn through the crankcase. This air carries pollution from oil to the intake manifold and burned in the cylinder with fuel. Engine Cooling System: The cooling system is used to keep the engine in the most efficient condition. About 30 to 35 % of heat produced during combustion is removed by cooling system. Temperature during combustion rises to about 3300 o C in the cylinder. Types of Engine Cooling System: There are two types of Engine Cooling System- 1. Air cooled 2. Liquid cooled. Main Components of Engine Cooling System: Radiator, pump fan, cooling lines, water jacket, thermostat.
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