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.

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Can a car seat recognize its owner's rear end?

Researchers in Japan have developed a new method of auto theft deterrent that verifies the driver's identity. Are you comfortable with your car seat knowing this much about you?

How will the car of the future use biometrics?

We can already use biological markers to identify people, but within the next decade, similar technology is coming to our cars, too. Will this be yet another distraction for drivers?

Is carbon fiber old news?

Carbon fiber is one of the lightest and strongest materials used in auto manufacturing; however, it's expensive and time consuming to produce. Has it already been replaced by something better?

Compression Ratio and Octane Ratings: What You Need to Know

Unleaded, high octane, supreme: We'll show you which gas your car really needs and how easy it is to figure out.

5 Future Car Technologies That Truly Have a Chance

It's no secret that technology changes fast -- and the auto industry is no exception. So what's in store for future cars?

What's the difference between torque and horsepower?

Horsepower and torque are closely related -- but what sets them apart?

What does a 4-2-1 exhaust system do?

Did you know that there is more than one way to control car emissions? One type is the 4-2-1exhaust system.

What's the connection between compression ratio and fuel economy?

Some of the latest gasoline engines to hit the market are super-efficient, thanks to their engineers playing with a little thing called compression ratio.

5 New Engine Technologies That Make Cars More Fun to Drive

Whether it's a tiny city car with a direct-injected engine or a supercar with a "push to pass" hybrid booster button, these technologies promise that the future of driving will still be fun.

6 Automotive Parts You Can Easily Recycle

Reducing your vehicles carbon footprint is as easy as 1...2...recycle. Learn more about the 6 automotive parts you can easily recycle.

6 DIY Automotive Repairs Anyone Can Do

As a long time automotive writer and enthusiast I am often amazed at the prices mechanics charge for simple repair work that most anybody could do themselves. Learn more about the 6 DIY automotive repairs anyone can do.

6 Great Car Battery Maintenance Tips

Owning jumper cables is like owning a truck. When you own a truck, people seem to cozy up to you when they are moving. Learn more about the 6 great car battery maintenance tips.

7 Ways to Make Your Whole Vehicle Last Longer, From Wheels to Wipers

Did you know that many insurance companies figure most vehicles on the road have only 10 years of useful life before being carted off to the junkyard? Learn more about the 7 ways to make your whole vehicle last longer, from wheels to wipers.

Could Your Gas Cap Be Costing You Money?

There are a lot of lids in this fast-paced, modern world. There are lids for ketchup bottles. Learn more about could your gas cap be costing you money.

Do It Yourself Vehicle Care: Spark Plugs vs. Fuel Economy, Part 1

DIY Vehicle Care: Spark plug vs. Fuel economy, Part I. In this aritcle learn the differences between spark plugs and fuel economy.

Get Money For Your Old Car Batteries

Get money for your old car batteries. Learn how you can get money for your old car batteries from this article.

Synthetic vs. Conventional Motor Oil: Which is Best for Your Needs and Environment's?

Synthetic vs. Conventional motor oil: Which is best for you needs and environment's? Learn more in this article.

Top 7 Ways to Reduce Your Driving Emissions without Reducing Quality of Life

Here are seven easy ways to reduce your emissions without affecting the quality of your daily commute. Learn more about the top 7 ways to reduce your driving emissions without reducing quality of life.

What is engine knock?

Are there worrisome sounds coming from under the hood? Whether it's an annoying ping, a persistent knock, or a dramatic detonation, there are many ways to soothe a noisy engine.

How does piston shape affect combustion?

As engines have evolved over the years, so have the pistons within them. In fact, the shape of a piston has a dramatic effect on the combustion process.

How Laser-powered Headlights Work

Lasers have an illumination power that's about 1,000 times more powerful than LEDs. So, will laser-powered headlamps be too intense for other motorists? Are they a traffic incident waiting to happen?

How Air-Conditioned Seats Work

Did you know that if your car didn't come from the factory with refrigerated seats, there are several manufacturers that would be happy to sell you air-conditioned seat cushions?

How Toyota Entune Works

At one time, gadgets designed to keep us informed and entertained while on the move came from the automotive aftermarket. Now automakers are providing complex, digitally connected gizmos as factory equipment.

How can you use in-car Internet?

In a world that seems hyperconnected already, are cars the next things to go wired with Internet access?

Can you stream online music to your car?

These days, the majority of the music we listen to is streamed from the Internet and stored on our computers and smartphones. But is there a way we can access online music in our cars and trucks?