Engine Block: It is the main body of the engine and includes all other parts.

Pistons: These are the parts placed inside the cylinders that move up and down in the engine block..

Rollers: They are tubular spaces in which pistons move up and down..

Valves: These are valves on top of the cylinders and control the entry of the air/gas mixture into the cylinders and the removal of combustion gases..

Valves and Cam Shaft: Valves control the opening and closing of valves. The camshaft determines the timing of valve opening and closing.

Internal-combustion engine: This is the type of engine most cars use. Uses fuel for combustion in cylinders.

Fuel Injectors: It sprays fuel into the cylinders and creates the mixture for the combustion process.

Starter Motor: It is required to start the vehicle engine. The starter motor provides rotary motion to the engine.

Cylinder Head: Covers the cylinders and controls the operation of the valves.

Cooling System: It prevents the engine from overheating. It consists of parts such as radiator, water pump and thermostat..

Oil System: It performs the lubrication and cooling function of the engine. Includes components such as oil pump, oil filter and oil tank.

Exhaust System: It throws out the results of combustion. It consists of parts such as exhaust manifold, catalytic converter and exhaust pipe..

Alternator: It produces the electrical energy required to start the engine. The alternator performs this function.

Fuel Tank and Pump: It provides fuel to the engine. Fuel tank, fuel pump and fuel filter are parts of this system.

Engine Control Unit (ECU): It controls the performance and emissions of the engine. Regulates fuel injection and other engine parameters.