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What is correct about an air-cooled engine?
  • A
    Air is ducted through the oil cooler first and then passes through the engine, cooling it.
  • B
    Fins increase the cylinder and head surface areas.
  • C
    The header tank is placed above the system.
  • D
    The air cooler matrix is water cooled.

Refer to figure.
AIR-COOLED ENGINE
An air-cooled engine has a simple design. It has metal fins on the outer surfaces of head and cylinder block which increase the area exposed to the cooling air, allowing the air to pass through and cool the engine. These fins provide a larger contact area so as to achieve better heat dissipation. The cooling fins have the same purpose as the water jacket on a Liquid-cooled engine, where coolant is circulated through the water jackets in the engine cylinder block and cylinder head.

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