Cylinder head

The top end of cylinder is closed by means of removable cylinder head. There are two holes or ports at the cylinder head, one for intake of fuel and other for exhaust. Both the intake and exhaust ports are closed by the two valves known as inlet and exhaust valve. The inlet valve, exhaust valve, spark plug, injector etc. are bolted on the cylinder head. The main function of cylinder head is to seal the cylinder block and not to permit entry and exit of gases on cover head valve engine. Cylinder head is usually made by cast iron or aluminum. It is made by casting or forging and usually in one piece.

Parts of the machine: (cylinder head)

name location materials function Physical appearance

Spark plug Inside the intake ports

Made of titanium metals (for most cars

Serves as the part to start the ignition of the car to form the spark or combustion

Small metals carrying electrodes separated by an air gap

Springs close valves

Beneath the valve retainer

Made of titanium metal

Absorb the force created by the rocker shaft to lessen damage

Thick curled springs

Rocker shaft Near the springs connecting the valve retainer

Titanium steel or aluminum

Serves as the part that makes the valve works

Thin metal SHEET

Intake ports Mostly at the top near the rocker shaft; some are located at the back side of the cylinder head

Made of titanium metal

Lets the air enters the machine to balance the temperature of the cylinder head to avoid overheating

3 to 4 large holes

Valves Connected to the rocker arm pivots

Made of titanium metal

Cirlcle-flat shape material

Stud hole Can be seen at the four corner top part of the cylinder head

Holds the screw of the cylinder head connecting to the main part of the car.

Four little holes in which a screw can fit in