Automobiles engines are complicate mechanisms that are made up of several internal parts that work like clockwork to produce that moves your vehicle. In order to operate engine properly it needs a ll of its parts to be in good condition. All the parts of the motor are essentially bolted to Engine block. Inside the block is where magic is happens, such as combustion. Pistons pump up and down as the spark plugs fire and the pistons compress the air I fuel mix. This reciprocating energy is converted to rotary motion and transferred to the tires by the transmission,via the drives haft, to make them spin. The cylindrica l head is attached to the top of the block in order to seal the area to prevent the loss of gases. The spark plugs, valves and other parts are fitted to it.