1. Turbocharger
   Bearing
2. Intercooler
   Fuel pump

A bearing reduces friction between components within the engine.

1. Radiator
   Fuel pump
2. Spark plugs
   High tension leads

A fuel pump makes sure fuel gets from the area where it is stored (the fuel tank) to the engine where it is ignited to help propulsion.

1. Starter motor
   Fuel hose
2. Oil pump
   Water pump

When you turn the key of your car, the starter motor begins the combustion process by rotating the engine through the first part of its cycle.

1. Timing belt
   Oil pump
2. Fuel pump
   Radiator

Made of rubber, the timing belt rides on sprockets. Its purpose is to help the cylinder fire at the right time.

1. Fuel tank
   Spark plugs
2. Main bearings
   Radiator

The main bearings are between the crankshaft and the block. The crankshaft rotates on these bearings.

1. Sprocket
   Spark plugs
2. Nuts and bolts
   Oil sump

Spark plugs provide the spark that ignites the air/fuel mixture which starts the motor and keeps it running.

1. Fuel tank
   Radiator
2. Sump
   Oil pan

Radiators are crucial in ensuring that an engine runs at an optimal temperature, cycling water and coolant through it when needed.

1. Exhaust system
   Valve lifter
2. Connecting rod
   Piston

The exhaust manifold, catalytic converter and muffler are all parts of the exhaust system.

1. Distributor
   Engine block
2. Oil Pan
   High tension leads

Cast out of metal, the engine block houses most of the inner workings of the engine, including the crankshaft, pistons and cylinders.

1. Crankshaft
   Connector rod
2. Oil control ring
   Radiator

Found under the umbrella of the piston rings, the oil control ring makes sure the correct amount of oil is used in the engine's cylinders.

1. Nuts and bolts
   Sprocket
2. Fuel line
   Ignition System

The battery, ignition coil and spark plugs are all elements of the ignition system.

1. Radiator
   Hydraulic Valve Lifter
2. Fuel pipe
   Oil pump

This helps to maintain zero valve clearance using hydraulic oil pressure.

1. Fuel tank
   Water pump
2. Turbocharger
   Fan belt

In simple terms, a turbocharger pushes more air into the engine, which in turn creates more power as more fuel is burned.

1. Spark plug
   Timing belt
2. Valve lifter
   Brake fluid reservoir

This helps lift the valves within the engine, opening and closing them when needed.

1. Oil pan
   Fuel tank
2. Air filter
   Spark plug

This is the reservoir where the oil used to lubricate the engine sits when it is not running.

1. Intercooler
   Sprocket
2. Turbocharger
   Cam belt

Reducing the temperature of the air entering the turbocharger makes it denser, thus creating more power.

1. Exhaust system
   Ignition system
2. Carburetor
   Fuel pump

This controls the amount of air and fuel entering the engine.

1. Radiator cap
   Wrist pin
2. Dual overhead camshaft
   Exhaust valve

It is essential for all the gasses created by the combustion process to be released into the exhaust system. This valve does that.

1. Exhaust pipe
   Fan belt
2. Air intake manifold
   Radiator

This part is essential to how your engine runs. It allows the fuel/air mixture into the cylinder of the engine where it will combust, prompting the engine to run. It does this by evenly distributing the air/fuel mixture to the intake ports.

1. Camshaft
   Oil pan
2. Engine block
   Valve cover

This protective cover is also called a "cam cover" or sometimes a "timing cover."

1. Fuel tank
   Oil pump
2. Wrist Pin
   Distributor

A wrist or piston pin (or gudgeon pin in the U.K.) connects a piston to a connecting rod, allowing it to pivot when the piston moves.

1. Compression ring
   Piston pin clip
2. Thermostat
   Water pump

This ring helps to form a seal with the cylinder wall within the engine.

1. Oil filter
   Water hose
2. Oil pan
   Air Filter

An air filter ensures the air entering the engine, which is used during the combustion process, is kept clean and free of any particles that may damage the engine.

1. Fan Belt
   Fuel Tank
2. Oil Filter
   Piston Pin Clip

Secured on both sides, the piston pin clip keeps the piston pin in place.

1. High tension leads
   Spark plug
2. Oil filter
   Radiator

Oil keeps all the moving parts of an engine lubricated. An oil filter helps to remove impurities that build up in the oil that might damage the engine.

1. Fuel tank
   Radiator
2. Oil filter
   Intake valve

Located on the cylinder head, this valve is driven by the camshaft.

1. Vibration dampeners
   Sodium cooled valves
2. Cylinder head bolts
   Sprockets

Also called head bolts, these secure a cylinder head and its gasket to the engine block.

1. Exhaust valve
   Fuel tank
2. Radiator fan
   Distributor

This makes sure the spark plugs fire in the right order, necessary for smooth operation.

1. Crankshaft
   Cylinder liner
2. Spark plug
   Piston

This hollow tube fits into the cylinder bore within the engine, giving it a measure of protection.

1. Cam belt
   Valve cover
2. High tension leads
   Crankshaft

High tension leads carry the high voltage necessary for the spark plugs to fire, igniting the air/fuel mixture in the cylinders.

1. Oil sump
   Fuel tank
2. Radiator
   Piston

This is the reservoir where the oil used to lubricate the engine sits when it is not running.

1. Spark damper
   Oil damper
2. Vibration damper
   Radiator damper

The main purpose of this part is to help prevent vibrations caused by the rotation of the crankshaft.

1. Front crankshaft pulley
   Piston
2. Sprocket
   Timing belt

This pulley is bolted to the crankshaft. It helps reduce the vibration caused by its rotation.

1. Crankshaft
   Spark plug
2. Thermostat
   Air intake manifold

A thermostat ensures that coolant is only pumped from the radiator once the engine has warmed up sufficiently.

1. Fan belt
   Oil pump
2. Distributor
   Crankshaft

The oil pump circulates oil through the engine under pressure to lubricate the moving parts. It also helps with cooling the engine.

1. Valves
   Oil pump
2. Fuel tank
   Distributor

The valves within an engine open and close in sequence to let the air and fuel mixture in. They then seal when combustion takes place and let out the gases produced.

1. Distributor cap
   Fan belt
2. Connecting rod
   Oil sump

This part connects the piston to the crankshaft, transferring the power of combustion into mechanical force.

1. Connecting rod
   Piston
2. Valve cover
   Engine block

A piston is attached to a connecting rod. It moves up and down in a cylinder, turning the crankshaft.

1. Fan plug
   Cam plug
2. Expansion plug
   Radiator plug

The expansion plug expands when coolant freezes, which is often the case in cold climates. They are also called core plugs, frost plugs or freeze plugs.

1. Chloride bearings
   Water pipe
2. Sodium cooled valve
   Nitrogen plugs

This valve helps things keep cool by letting the sodium within melt at high temperatures. This has a cooling effect.

1. Balance shaft
   Compression ring
2. Oil pan
   Fuel pipe

This counterweighted engine shaft helps offset unwanted crankshaft vibrations.

1. Oil filter
   Camshaft
2. Water pump
   Crankshaft

When fuel burns in the engine, it pushes the pistons which, in turn, rotate the crankshaft. This causes the vehicle to move.

1. Single overhead helical crankshaft
   Sodium heating component
2. Single overhead camshaft
   Standing oxygen hydro-calipers

This type of engine has one camshaft. It opens and closes the exhaust and intake valves.

1. Fuel hose
   Water reservoir
2. Sprocket
   Oil filter

A sprocket is a wheel with a set of teeth on the outer circumference. It drives items like the timing chain or belt.