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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.

Topics to Explore

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10 Car Features We Wish Came Standard

Everyone wants a loaded car, but it's expensive to get all the options. You have to pay extra, sometimes a lot extra -- like buying-a-whole-Bentley extra -- to get the coolest of the cool bits.

10 Cars to Watch in 2014

Whether you're an all-around gearhead or you’re usually indifferent to cars, you're likely to find something on this list to spark your interest. These autos bring new (and awesome) features to the table for 2014.

Will new motor mounts increase engine response?

Motor mounts normally hold your car's engine firmly in place. But worn-out mounts allow a running engine to shift and bounce in all kinds of unpredictable, power-sapping ways.

How does engine placement affect handling?

There are plenty of great reasons to design a car with its engine in the front; however, the same can be said for placing the engine behind the driver. Does engine placement really matter?

Do exhaust cutouts increase horsepower?

Modern car and truck engines are typically efficient and powerful at the same time. But is there a relatively simple way to free-up some additional horsepower through the exhaust?

How much horsepower does a cold air intake add?

A cold air intake is one of those rare modifications that works pretty well on its own. But how much horsepower can you really expect to gain?

How much horsepower does a performance muffler add?

Replacing your car's stock muffler with a performance muffler is a good idea -- that is, if it's a rusted-out mess and you need to replace it anyway. But will this mod actually increase horsepower?

5 Cheap Ways to Increase Horsepower

If you're serious about increasing your car's horsepower -- and you have deep pockets -- your options are almost unlimited. But what can you do if you're on a tight budget?

5 Signs Your Engine Is Losing Power

Have the horses under your hood turned into mere ponies? If so, you and your four-banger may have a power problem on your hands. Here's how you can tell.

How much horsepower does a supercharger add?

A supercharger is a considerable investment; however, it's also one of the best ways to improve the fun factor of driving your car or truck. How much additional horsepower should you expect?

Does a dual exhaust system improve your car's performance?

It seems like clearing out the exhaust as fast as possible would give you a bit of an edge over the competition. But does a dual exhaust system really improve your car's performance?

How Paintless Dent Removal Works

If you've ever watched a real pro in action, paintless dent removal appears deceptively simple. But is it really as easy as it looks?

10 Serious Mistakes in Car Maintenance

There are so many dangerous, irresponsible and downright ridiculous things you can do to a car while "fixing" it that it was difficult to narrow this list down to just 10 examples.

How the Rotating Detonation Engine Works

How would you like to save $300 to $400 million on your annual fuel bill? The U.S. Navy is ready -- and they'll do it with rotating detonation engines.

10 Problems Cars Can Diagnose By Themselves

Modern cars and trucks can keep track of their own health. The problem often comes when they try to communicate their information to the driver. How does your car talk to you?

How an Electronic Sun Visor Works

A sun visor's primary role in any car is pretty straightforward, right? But as far as automotive designers and aftermarket electronics manufacturers are concerned, anything can be improved.

Can you buy a car with Siri built in?

She talks, she jokes, she knows where all the best restaurants are, and she's even handy with a map. Now Siri may be coming to your car.

How Automatic Braking Systems Work

Most auto manufacturers want to make it clear that they're not trying to take driving away from the driver. But research shows that we could use a little help in the braking department.

Inside an Opposed Piston Opposed Cylinder (OPOC) Engine

Do you know how Opposed Piston Opposed Cylinder (OPOC) engines work? Check out this amazing graphic that explains how OPOC engines work!

Inside a Sleeve Valve Engine

Do you know how sleeve valve engines work? Check out this amazing graphic that explains how sleeve valve engines work!

How MirrorLink Works

From a user's standpoint, MirrorLink is pretty slick. It's the magic that makes your smartphone's computer and the car's computer talk to each other.

How Run-flat Tires Work

Did you know that Goodyear has been making run-flat tires for NASCAR since 1966? Decades later, tire engineers are still perfecting the design for everyday drivers on public roads.

Are modern cars vulnerable to hackers?

Thieves and thugs will always find a way to take something they didn't work for. But just how vulnerable are modern automobiles to a high-tech attack?

10 Hottest New Cars for 2013

Will 2013 be a decent year for the auto industry? Well, if these 10 cars can make it to production, there should be a lot of happy motorists out there.

How much horsepower is enough?

Modern car engines can create massive amounts of horsepower -- and everyone wants more power, right? But how much is too much? And how much is just enough?

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