1. It’ll start an oil fire.
   The engine will seize.
2. It’ll cause oil poisoning.

Oil lubricates the pistons so they can glide inside the cylinders, and, without oil, pistons will get stuck and the engine will come to a grinding halt.

1. Air intake and turbocharger
   Battery and fan
2. Radiator and water pump

The water pump circulates the coolant which draws heat from the engine. The coolant then returns to the radiator which disperses the heat.

1. Carburetion, hybridization, electrical charging
   Fuel injection, infusion, circulation
2. Carburetion, port fuel injection, direct fuel injection

As engine science has evolved, carburetion, port fuel injection and direct fuel injection have all gotten the job done.

1. A way to tell how fast a car can go
   A way to tell how much the fuel can be compressed
2. A way to tell how much the engine will wear out

The octane rating indicates how much the fuel can be compressed before igniting (the higher the number, the greater the compression potential). Also, a high octane number is more resistant to engine knock.

1. How much nitrous oxide you can use
   An engine’s maximum rpm
2. An equation that determines when the turbo kicks in

An engine’s redline, which is displayed on the tachometer, shows its maximum revolutions per minute, or rpm, and indicates the engine's top speed.

1. Convert fuel into heat
   Convert fuel into motion
2. Convert fuel into exhaust

Your car engine is a complicated machine that takes in fuel and air and creates movement. Think about that the next time the engine light comes on!

1. Intake, compression, combustion and exhaust
   Injection, rotation, combustion and exhaust
2. Injection, carburetion, rotation and exhaust

You may have heard of a two-stroke engine as well — you can often find them in lawn mowers and other small engine devices. Car engines run on a four-stroke cycle — intake, compression, combustion and exhaust.

1. Deliver fuel to the cylinders
   Change linear to rotational motion
2. Keep cylinder heads in place

When fuel ignites in a cylinder, the piston moves the connecting rod up and down, which turns the crankshaft and creates rotation.

1. The flywheel to the camshaft
   The crankshaft to the camshaft
2. The cylinder head to the camshaft

A timing belt, or timing chain, synchronizes the crankshaft and the camshaft. The camshaft turns half as often as the crankshaft.

1. Camshaft
   Timing belt
2. Distributor

A camshaft is a rotating rod that opens and closes the valves with radial cams. Most modern engines have overhead cams, meaning the camshaft is above the valves.

1. A set of gears that makes the wheels turn faster
   A turbine that compresses the air traveling into the engine
2. An injector that delivers fuel to the engine faster

Both forced induction methods, turbochargers and superchargers get more air into the engine which can boost engine power.

1. Sends electricity to the spark plugs, starting ignition
   Sends electricity to the fuel pump, forcing the car to start
2. Cycles the engine, starting the combustion process

The starter motor powers the engine for the first two strokes (Intake and compression), at which point the engine becomes self-sustaining. The car battery is responsible for powering the starter motor.

1. They set off too many smoke alarms.
   They smelled too bad.
2. They are less efficient than car engines.

From an efficiency standpoint, internal combustion engines beat out external combustion engines.

1. It’ll make it hard for the engine to burn the fuel.
   It’ll help the car get better gas mileage.
2. It’ll keep the cylinders extra cool.

Water can dampen the combustion process. Simply emptying the tank and adding new fuel is often the best remedy.

1. Tesla Model S
   Volkswagen Beetle
2. Ford Model T

The VW Beetle was given an air-cooled engine because it cost less money to manufacture.

1. Motorcycles
   Hybrid cars
2. Oscar Mayer Wienermobiles

Many motorcycles use air-cooled engines, which are louder than liquid-cooled models.

1. Lubrication, cooling, cleaning
   Lubrication, getting rid of exhaust smell, making gas more powerful
2. Cooling, cleaning, making more money for Jiffy Lube

The oil pan is bolted to the engine block and holds the oil that gets circulated through your engine parts.

1. The engine’s movement compresses too much oil.
   It gets too dirty to work.
2. The oil evaporates in the summer.

Whether your car requires an oil change every three months or six months, you need to keep your oil clean to keep your car engine running. Also, since some aging engines tend to lose a bit, make sure the oil's volume stays where it needs to be.

1. Engine control module, which is the engine’s computer
   Engine car manager, which controls the oil coming out of the engine
2. European custom mechanics, which helps race car owners keep track of their modifications

The ECM is the computer that oversees the functions of your engine to make sure everything is running efficiently.

1. Power plant
   Firecracker engine
2. Hydroponic engine

A power plant using natural gas heats water until it boils and turns to steam. This turns a turbine and generates electricity.

1. Lack of exhaust
   Lack of water
2. Lack of spark

Fuel, compression and fire — these are just a few key things that can go haywire under your hood.

1. V-6, V-8 and HEMI
   Inline, V and flat
2. Inline, flat and chrome

Did you know? The old-school VW Beetle is a classic example of the flat configuration.

1. Banging and clunking
   Clicking and clacking
2. Pinging and detonation

No matter the name, engine knock can seriously mess up your engine.

1. The Watt 500
   The Stanley Steamer
2. The Stephenson 900

Did you know? From 1899 to around 1905, Stanley Steamers outsold gasoline-powered automobiles.

1. It's fuel-efficient.
   It’s faster.
2. It uses watered-down gas.

Downsize to a four-cylinder engine and you can save some cash at the pump.

1. Alternator
   Battery
2. Spark plugs

After you start your car, the alternator recharges the battery and keeps your electrical components running. Running things from the battery alone will drain it rather quickly.

1. Bad spark plugs
   Driving too fast
2. A loose latch on the car's hood

Engine knock can be caused by multiple issues, and automakers recommend putting in new spark plugs around 30,000 miles.

1. Because of coal rolling
   Because the fuel contains more energy
2. Because it's louder

Diesel provides great fuel economy and is more energy dense than regular gasoline. Maintenance cost for diesel engines, however, is generally more than gasoline engines.

1. A nuclear submarine
   A giant robot
2. A spud gun

A spud gun and a car engine both operate by igniting fuel in a chamber.

1. Otto cycle
   Tesla cycle
2. Compression cycle

The Otto cycle is named after its inventor, Nikolaus Otto.