Cylinder head
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The cylinder head bolts onto the top of the cylinder block where it forms the top of the combustion chamber. It carries the valves and in many cases the camshafts.
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Cylinder head design
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Cylinder head’s combustion chambers are designed to help improve the swirl or turbulence of the air-fuel mixture, and prevent fuel droplets settling on the surfaces of the combustion chamber or cylinder walls.
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Diesel combustion chambers
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Direct-injection diesels inject into the combustion chamber formed in the top of the piston. For indirect injection, the combustion chamber is a separate chamber formed in the head.
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Intake & exhaust passages
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Smaller intake and exhaust passages and ports allow more torque at low engine speeds. At high speeds, smaller passages restrict airflow. Larger passages produce greater power at high engine speeds.
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Gaskets
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Gaskets form a seal by being compressed between stationary parts where liquid or gas could pass. Gaskets around a rotating part would quickly wear out. Oil seals are used to seal these parts.
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Gaskets and oil seals
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Gaskets form a seal by being compressed between stationary parts where liquid or gas could pass.
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Head gaskets
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Head gaskets seal and contain the pressures of combustion within the engine, between the cylinder head and the block.
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| Turbulence |
Turbulence refers to the swirling motion of a liquid or a gas. |
