Above each cylinder is a sparkplug. When it sparks, it ignites the compressed fuel and air, causing the mini-explosion that pushes the piston down. So now that we know all the basic parts of the engine, let’s take a look at the movement that actually makes our car move: the four-stroke cycle.
The cylinder head is a piece of metal that sits over the engine’s cylinders. There are small, rounded indentations cast into the cylinder head in order to create room at the top of the chamber for combustion. A head gasket seals the joint between the cylinder head and cylinder block. Intake and outtake valves, spark plugs, and fuel injectors (these parts are explained later) are also mounted to the cylinder head.
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