Engine Head Parts (Cylinder Head)

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The engine head, also called the cylinder head, is the top part of an internal combustion engine. It closes the top of the cylinder and forms the combustion chamber where fuel burns to produce power.

Main Parts of the Engine Head

Cylinder Head

Covers the top of the cylinder.

Houses the valves, spark plug, and combustion chamber.

Inlet Valve

Allows the air-fuel mixture to enter the cylinder during the intake stroke.

Exhaust Valve

Releases burnt gases from the cylinder during the exhaust stroke.

Spark Plug (Petrol Engine)

Produces a spark to ignite the compressed air-fuel mixture.

Valve Springs

Return the valves to the closed position after opening.

Rocker Arm

Transfers motion from the camshaft to open and close the valves.

Camshaft

Controls the timing of opening and closing of the inlet and exhaust valves.

Combustion Chamber

Space where the air-fuel mixture burns to produce power.

Head Gasket

Seals the joint between the cylinder head and engine block.

Prevents leakage of gases, coolant, and engine oil.

Functions of the Engine Head

Seals the top of the cylinder.

Holds the valves and spark plug.

Forms the combustion chamber.

Controls the flow of air-fuel mixture and exhaust gases.

Helps dissipate engine heat through coolant passages.

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