1. Oil pan
   Oil filter
2. Crankshaft
   Rotor

Attached to the bottom of the engine, the oil pan is the reservoir where oil is kept when the engine is not running. To drain old oil from your engine, simply loosen a special bolt and drain the oil to dipsose of later.

1. Glow plug
   Spark plug
2. Distributor cap
   Catalytic converter

Essentially, spark plugs are the most important factor in a vehicle starting. They provide the spark that ignites the air-fuel mixture which starts the motor and keeps it running.

1. William C. Durant
   Henry Ford
2. Karl Benz
   None of the above

Karl Benz not only was responsible for the first car in 1885, he also produced a reliable two-stroke gasoline engine that made it possible in 1879.

1. Circle
   Wankel
2. Turning
   None of the above

A rotary engine is very different to a conventional engine. For the main part it has no pistons. These are replace by rounded rotors. The combustion process causes these rotors to turn, which in turn generates power.

1. Léon Levavasseur
   Henry Ford
2. Ransom E. Olds
   Henry Leland

The first V8 engine was invented in 1902 by Léon Levavasseur. V8 engines were initially used in boats and aircraft but eventually moved on to the automobile.

1. Compression
   Intake
2. Power
   Exhaust

The intake stroke is the first one taken by a running engine. Here a pressure vacuum sucks the fuel/air mixture into the cylinder, where it will be combusted.

1. Electrical engine
   Internal combustion engine
2. Steam engine
   None of the above

Without the internal combustion engine, cars would not exist today as we know them. Sure there are other engine types, but it's the internal combustion engine that has powered vehicles for the last 130 years.

1. Connecting rod
   Crankshaft pin
2. Rack and pinion
   Rotor

All pistons are secured to the crankshaft via a connecting rod. This allows the piston to move the crankshaft after the power stroke.

1. X
   Y
2. Z
   V

Each arrangement has its own unique pros and cons, but cylinders arranged in a V are certainly the most powerful. In fact, Volkswagen put two banks of V engines together to create an even more powerful W engine for the Bugatti Veyron.

1. Carbon dioxide
   Gasoline
2. Oxygen
   Oxygen/gasoline mix

The air/gasoline mixture is ignited by the spark from the spark plug prompting the combustion necessary to keep the engine running.

1. Cylinder head
   Water pump
2. Fuel filter
   Starter ring

A water pump moves coolant from the radiator through the engine where the excess heat is transferred to it. It then returns to the radiator.

1. Fuel filter and fuel pump
   Glow plug and high tension leads
2. Fan belt and spark plug
   Crankshaft and camshaft

A timing belt is crucial to ensure the engine fires correctly by keeping valves and pistons in sync.

1. Above
   Left
2. Right
   Below

Overhead cam engines have a camshaft situated above the valves. This is the most common type of layout in engines.

1. Wankel
   W engine
2. V engine
   Z engine

The odd one out here is a Z engine. Nothing like that exists. A Wankel engine is also called a rotary engine. We all know what a V engine is, for example a V8, and a W engine is two V engines in line.

1. Compression
   Exhaust
2. Intake
   Power

Once the fuel/air mixture has been burnt up, it produces gases, These are removed from the engine via the exhaust system through the exhaust stroke.

1. Tailpipe
   Muffler
2. Exhaust valve
   Crankshaft oil seal

An exhaust valve is found in the cylinder head. It is driven by the camshaft and releases exhaust gases after combustion.

1. Rocker arm
   Fan belt
2. Engine block
   Crankcase

Cast out of metal, the engine block houses the crankshaft, pistons and cylinders. The engine block is also sometimes called the cylinder block.

1. Tappett
   Cover piece
2. Drive block
   Valve cover

The valve cover is bolted onto the cylinder head. It acts as a protective lid to the inner workings of the engine.

1. Air filter
   Air intake manifold
2. Camshaft fastener
   Crankshaft

The crankshaft changes the linear motion of the piston stroke into a rotational one, which turns the driveshaft and makes a vehicle move.

1. Starter motor
   Intake valve
2. Rocker cover
   Exhaust valve

Driven by the camshaft, the intake valve is located in the cylinder head. It has the job of letting in the right amount of air/fuel mixture into the cylinder.

1. Open and close to let the gas/air mixture into the cylinder, then seal to allow combustion
   Allow lubricant to travel around the engine
2. Allow coolant to travel around the engine
   None of the above

Valves must open to let the gas/air mixture into the cylinder and then close to allow combustion to happen. Finally, they open to release the gases that are left over after the combustion process.

1. Oil filter
   Muffler
2. Connecting rod washer
   Supercharger

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.

1. Camshaft
   Carburetor
2. Alternator
   PCV valve

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. Straight
   Inline
2. W
   Flathead

The most common configuration for the cylinders in an engine is inline. These can be 2-, 4-, 6- or 8-cylinder engines.

1. Power
   Compression
2. Intake
   Exhaust

The power stroke is the third of four in a running engine. Once compression has taken place and the air/fuel mix has combusted, the power created by this is transferred to the crankshaft, which then turns.

1. It dissolves the gas formed by the combustion process.
   It lubricates moving parts.
2. It cools the engine.
   It makes the engine run at its optimum.

There are many metal parts within the engine. These need lubrication which motor oil provides, ensuring that they do not wear out quickly.

1. Oil filter
   Water pump pulley
2. Crank pulley
   Air filter

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, more often if you drive on dusty, unpaved roads.

1. Part of the engine management system
   It holds brake fluid.
2. Circulates engine coolant when needed
   It holds oil.

A radiator dissipates the heat that engine coolant carries from the engine into it. It then circulates the now-cooler engine coolant back into the engine to do the same again.

1. Engine block
   Cylinder
2. Oil sump
   Fuel tank

Pistons are housed within the cylinder, where they form a tight fit. Here they move up and down in the cylinder.

1. Balance shaft
   Rocker arm
2. Camshaft phase variator
   Piston pin and crank pin

The balance shaft is a counterweighted engine shaft. It offsets unwanted crankshaft vibrations that would cause untold problems over time and make your ride thoroughly unpleasant.

1. Boxer
   V
2. W
   None of the above

A boxer engine, or horizontally opposed engine, sees cylinders arranged on either side of a crankshaft.

1. Y engine
   Oxygen engine
2. Horizontally opposed engine
   None of the above

Horizontally opposed engines appear in many vehicle types, including motorcycles. They are often called flat engines, as well.

1. Starter motor
   Rotating rotor
2. Key
   Harmonic balancer

When you turn the key in your ignition, the starter motor engages. It turns the engine over, starting it.

1. Windshield wiper blade
   Cabin air filter
2. Battery
   Glow plug

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. Intake
   Big Bang
2. Compression
   Power

The compression stroke sees the fuel/air mixture in the cylinder compressed enough to allow it to combust when the spark plug sparks.