1. Connecting rod bolt
   Air filter
2. Cylinder headcover
   Ignition coil

The air entering your car's engine needs to be clean. This is the air filter's job. Depending on the roads you drive on, it should be replaced every 15,000 to 30,000 miles, and more often if you drive on dusty, unpaved roads.

1. Water pump pulley
   Crankshaft oil seal
2. Glow plug
   Valve lifter

Valve lifters do exactly what their name suggests. They help to lift the valves within the engine, opening and closing them when needed. They are also known as hydraulic tappets.

1. Resonator
   Fan belt
2. Muffler
   Camber arm

The fan belt is made from rubber. It connects several components of the engine, including the cooling fan, alternator and the crankshaft pulley. Sometimes you may hear a loud squealing coming from beneath the hood. That's a worn fan belt.

1. Exhaust system
   Cooling system
2. Climate control system
   None of the above

The by-products of the combustion of the gas/air mixture during combustion are various gasses. These need to be removed from the engine through the exhaust system, starting with the exhaust manifold which collects the gases from the various cylinders then sends them down the exhaust system and out the tailpipe​.

1. Fuel filter
   Air filter
2. Oil filter
   None of the above

Oil keeps all the moving parts of an engine lubricated. An oil filter helps to remove impurities in the oil that might damage the engine. From time to time, you would need to replace the filter as it will get clogged up. Don't worry; your mechanic should do this when you have your car serviced.

1. Water pump
   Fuel pump
2. Oil pump
   None of the above

Depending on the engine, fuel pumps come in a range of configurations and types. Essentially though, they are responsible for pumping fuel along the fuel line to the engine under pressure.

1. Camshaft follower
   Piston pin bush
2. Gungeon pin
   Compression ring

If there is a compression problem in a cars engine, it will run poorly, if at all. A compression ring helps to form a seal with the cylinder wall within the engine.

1. Climate control system
   Ignition system
2. Exhaust system
   None of the above

Without the ignition system, a car will simply not start. There are many parts to an ignition system, including the battery, coil and solenoid, to name a few.

1. Drawing pin
   Cylinder head bolts
2. Zip ties
   None of the above

Also called head bolts, cylinder head bolts secure a cylinder head and its gasket to the engine block. To remove the cylinder head, you have to unscrew them. And of course, together with their gasket, they need to form a perfect seal.

1. Muffler
   Intercooler
2. Cambelt
   Exhaust gasket

An intercooler is part of a turbocharged engine only. By reducing the temperature of the air into the turbocharger, it is made denser, thus creating more power.

1. Starter motor
   Camshaft locking plate
2. Rocker arm
   Drive belt

When you turn the key in your ignition, the starter motor engages. It turns the engine over, starting it. If your starter motor fails, your engine cannot start.

1. Cylinder liner
   Catalytic converter
2. Exhaust manifold
   None of the above

This hollow tube fits into the cylinder bore within the engine. The pistons then move within this tight, sealed environment, compressing the fuel/air mixture to be combusted.

1. Fuel transporter
   Fuel line
2. Fuel filter
   None of the above

The fuel line is made of reinforced rubber to stop it from perishing. That doesn't mean that it cannot be damaged. In Hollywood movies, you always see the bad guys cutting the fuel line of the hero's car.

1. Water pump
   Sprocket
2. Oil filter
   None of the above

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

1. Fan
   Crankshaft
2. Solenoid
   None of the above

When fuel burns in the engine, it pushes the pistons, which in turn rotate the crankshaft. This causes the vehicle to move. Well, a few other things have to happen, but that is essentially the gist of it.

1. Pulley part
   Connecting rod bearing
2. Thermostat
   Timing tape

A thermostat ensures that coolant is only pumped from the radiator once the engine has warmed up sufficiently. It allows the coolant to be pushed through the engine whenever it is needed. The coolant then removes the heat from the engine and dissipates it while in the radiator. This process then repeats when needed.

1. Single overhead camshaft
   Oil filter
2. Gas tank
   None of the above

An engine with a single overhead camshaft (OHC) only had one of these engine parts. But what does it do? It opens and closes the exhaust and intake valves.

1. Choke cable
   ECU
2. Thermostat
   Intake manifold

An integral part of modern engines, an engine control unit or ECU is the brain of the engine. It uses a series of sensors that ensure the engine runs optimally at all times.

1. Camshaft phase variator
   Fuel line
2. Hi-tension leads
   Drive belt

The high tension leads play a crucial part in a car engine. They conduct the electrical current from the ignition coil to the spark plugs, which create the spark to start combustion in the engine.

1. Valves
   Cylinder head cover
2. Supercharger
   Piston pin bush

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. Starter pinion
   Cylinder headcover
2. Sparkplug
   Gas tank cap

Connected to the ignition coil, the spark plug provides the spark that ignites the fuel/air mixture, which then provides the combustion to run the engine.

1. Vibration absorber
   Camshaft pushrod
2. Crankshaft oil seal
   Connecting rod

The piston within the cylinder is connected to the crankshaft by the connecting rod. In fact, there are usually two of these connected to each piston. Why two? Well, if they were to fail, it would cause massive damage to your engine.

1. Air blowers
   Bearings
2. Cooling fans
   Oil gaskets

Bearings reduce friction between components within the engine. They protect and support various parts, including the crankshaft and connecting rods.

1. Spark plug lead
   Connector pin
2. Oil control ring
   O-ring

This ring is found under the umbrella of the piston rings. And what does the oil control ring do? It makes sure the correct amount of oil is used in the cylinders of the engine.

1. Cambelt
   Crankshaft
2. Tappet
   Valve

Pistons move linearly, up and down, essentially. The crankshaft, which is connected to the transmission through a flywheel, turns that movement into a rotational one. This is needed to move a vehicle forward (or backward, depending on the gear selected).

1. Fuel injector
   Overflow tank
2. Thermostat
   Camshaft pin

Fuel can be delivered straight into the combustion chamber by injectors or mixed with air first, at which the intake stroke of the piston is performed.

1. Fuel line
   Balance shaft
2. Radiator bolt
   None of the above

This counterweighted engine shaft helps offset unwanted crankshaft vibrations. Vibrations in an engine can lead to problems further down the line, so this is a crucial part on a vehicle.

1. Carburetor
   Alternator
2. Drive belt
   Valve stem seal

Not only does an alternator charge your battery, but​ it also powers most of the electrical systems on a vehicle. If it is faulty, your battery will quickly run flat.

1. Exhaust valve
   Coil
2. Tappet cover
   None of the above

It is essential for all the gasses created by the combustion process to be released into the exhaust system. This valve does that. They are then processed through the catalytic converter and released through the tailpipe.

1. Exhaust system
   Air intake manifold
2. Crank pulley
   Heater

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

1. Connecting rod washer
   Pistons
2. Crankcase
   Solenoid

A piston moves up and down within the cylinder, compressing the air/gas mixture, which is then ignited by a spark from the spark plug. Pistons are connected to connecting rods.

1. Valve cover
   Air intake housing
2. Harmonic balancer
   Mounting

The valve cover forms a protective cover over the cylinder head of the engine. This stops all kinds of dirt, grime and other debris from getting into the engine and fouling it up. Early engines didn't have valve covers. These are sometimes called rocker covers.

1. Oil filter
   Water pump
2. Distributor
   Fan

A distributor makes sure the spark plugs fire in the right order. If they do not, the vehicle will not run properly. The distributor is part of the ignition system.

1. Connecting rod washer
   Oil sump
2. Radiator
   Air duct

A radiator dissipates the heat that engine coolant carries from the engine into it. It then circulates it back into the engine to do the same again. If your radiator is leaking, your car's engine will overheat.

1. Valve housing
   Cradle
2. CV joint
   Engine block

The engine block is made of metal and houses the crankshaft, pistons and cylinders amongst many other parts. In some vehicles, the engine block is made out of aluminum, so it weighs less. Engine blocks are also called cylinder blocks.

1. Carburetor
   Camshaft pushrod
2. Distributor
   Solenoid

The carburetor controls the amount of air and fuel entering the engine. This is only found on older engines, however. Modern power units simply do not use a carburetor.

1. Gas tank
   Oil pump
2. Oil pan
   Oil filter

This is the reservoir where the oil used to lubricate the engine sits when it is not running. This would need to be drained when you perform an oil change. To do this, simply remove the bolt at the bottom of the pan and let the oil drain into a container.

1. V12
   Boxer
2. In-line
   None of the above

A boxer engine, or horizontally opposed engine, sees cylinders arranged on either side of a crankshaft. These are sometimes found in Porsche cars.

1. Tappet
   Battery
2. Valve
   Camshaft locking plate

If your car's engine is turning over sluggishly when starting, or nothing happens except for a ticking sound, it's likely your battery is the problem. That is always the first place to check.

1. Glow plug
   Fan belt
2. Camshaft
   None of the above

All the other parts are found on a gasoline-powered vehicle except a glow plug. That is just found in diesel-powered cars. A glow plug is essentially a small heater that warms up the engine before it starts. This allows the fuel/air mixture to burn properly from the start.