Under the Hood
The Under the Hood Channel explores the systems that make your car function correctly. Learn about car parts and systems and how to do routine maintenance.
10 Popular Car Modifications
How to Set up Car Speakers
10 Car Accessories That Could Be Dangerous
Modern Cars Are Kind of Boring. Why Is That?
Can car companies let known defects go without a recall?
Do car interiors turn toxic in the summer?
Making a Car Last for 300,000 Miles Is Totally Possible — Here's How
Are cars designed to fail at a certain point?
Will it hurt to spray electrical contact cleaner in an ignition?
What's the Fastest Car in the World?
Is Your Junk in the Trunk or the 'Frunk'?
You Can't Take Your Fancy Self-Driving Car Out of the City, Yet
The Long Strange History of License Plates in the U.S.
Do red cars get pulled over more often for speeding?
Do red cars cost more to insure?
How Do I Get Rid of a Dead Animal Smell in My Car?
5 Signs Your Engine Is Losing Power
How Gas Compression-ignition Engines Work
Did cars ever have external combustion engines?
How does engine placement affect handling?
Dieselgate and the Volkswagen Cartel
Diesel Isn't Always a Worse Polluter Than Gasoline
How Coal Rollers Work
10 Cold-weather Motorcycle Accessories
Is all motorcycle apparel made of leather?
What motorcycle accessories will help me stay cool?
How Laser-powered Headlights Work
How Air-Conditioned Seats Work
5 Useful Voice-activated Commands for Your Car
How to Avoid a 'Hurricane Car'
6 Automotive Parts You Can Easily Recycle
Get Money For Your Old Car Batteries
How Does Vertical Acceleration Work?
How Car Suspensions Work
How Car Steering Works
Why the Stick Shift Is Going Extinct
Gas-powered vs. Electric Cars: Which Is Faster?
Are manual transmissions really faster than automatics?
How to Replace Your Car's Serpentine Belt
The Dirty Truth About How Often You Need Your Oil Changed
Is Your Car Road-trip Ready?
How Many Wheels Are in the World?
Why Do Tires Blow Out More in Summer?
Winter Tires Really Do Make a Difference in the White Stuff
What Is an Ignition Coil?
Can your car tell you when the light's about to change?
How the Open Automotive Alliance Works
Learn More / Page 19
So why does a diesel engine with huge torque and low maximum RPM get a low horsepower rating compared to a low torque, high revving race car engine? Find out why in this article.
The goal of a carburetor is to mix just the right amount of gasoline with air so that the engine runs properly. Learn more about how a carburetor in a gasoline engine works.
There are three different engine configurations commonly used in automobiles -- inline, V, and flat. Learn the difference and find out what designers look at when deciding which configuration to use in a car.
It's the reason you can put the pedal to the metal and go from 0 to 60 in seconds. But to the uninitiated, an engine can look like a jumble of metal and wires.
If you have a vehicle that needs to be tested for emissions, you might want to check on the condition of your catalytic converter. So what is it and what does it do?
What does the computer in a car do? What was the Y2K scare about our cars starting?
Forced induction systems are one of the best ways to make lots of power, so which system is better? Turbochargers or Superchargers? Learn the pros and cons of both.
Mazda has been using this type of engine in some of its cars for several years. Learn what a Miller-Cycle engine is and how it works.
If you're planning to make more power from your engine. Switching to hi-performance exhaust headers are a good idea. Find out how exhaust headers work to improve engine performance.
Glare-resistant rearview mirrors can be useful when the vehicle behind you has extra bright headlights. Find out how simply flipping the rearview mirror can block out the bright light.
What is the difference between a normal lead-acid car battery and a "deep cycle" battery? I have a trolling motor on my boat and I don't see why I can't use my car's battery with it rather than spending another $80 on a deep cycle battery.
Japanese automaker Honda is best known for their VTEC system. Almost all of their newer vehicles are equipped with VTEC engines. But what does it actually do and how does it maximize engine performance?
How does the thermostat in a car's cooling system work? I had to test my thermostat today and was amazed as I watched it!
An oxygen sensor in a car is a very important part of making your engine run smoothly. Learn what it does and what can happen if your oxygen sensor fails.
I'm always hearing people talk about pumping nitrous oxide into an engine. How does nitrous oxide help an engine perform better?
I see many dump trucks with wheels on two rear axles on the ground and a third axle with elevated wheels that can be lowered. These seem to be used when the truck is full -- but why include what must be expensive hardware to raise and lower the wheels? Why not just keep them down at all times?
I would really like to know how people can make their cars jump up and down with their front wheels like they do in movies like "Boyz in the Hood."
If the battery light stays on when you're driving your car, does that mean you need a new battery?
What does that funny "H" pattern on my car's gear shift have to do with my transmission? How does it make the car change gears? And when I mess up and hear that horrible grinding sound, what is actually grinding?
Take diesel-engine technology, throw in a two-stroke cycle, and you've got the basis for the huge engines found in trains and big ships. Learn about the diesel two-stroke engine!
Diesel engines are often more efficient and less expensive to operate than their gasoline alternatives. So why aren't there more diesels on the roads? Well, they have their own issues, too.
Gear ratios are what allow a car to reach a high rate of speed or climb a steep hill. Learn about gear ratios, gear trains and planetary gear systems.
Surprisingly enough, horsepower actually does refer to the power of horses. But over the years it’s become a valuable measurement for all kinds of machinery. Learn how horsepower is calculated and what it means to the automobile industry.
If you have a car chances are you also have a tire-pressure gauge. Learn how this pen-sized device measures air pressure and why the little stick inside doesn't just fly right out the back!