Look under the hood of most cars and you'll probably find one or more pulley-driven belts. But if one of those engine belts break, your car can suddenly become undriveable. See more »

While diesel earned itself a bad reputation for spewing soot in the early days, improvements have made it much cleaner. Test your knowledge of all things diesel with this quiz. See more »

Unless it's entirely electric, it's under the hood of every car, truck and SUV, but how many people really know how one works? Do you know a spark plug from a fuel injector? Test your knowledge in our engine quiz. See more »

Today, hot bulb engines are a mainstay for serious antique engine collectors and represent a historic landmark in the evolution of gas engines. Efficient, simple and robust -- hot bulb engines had it all. See more »

Four strokes, less fuel. How's that sound? With the addition of just a couple of linkages, an Atkinson cycle engine can complete all four strokes with a single rotation of the crankshaft. See more »

It's the reason you can put the pedal to the metal and go from zero to 60 in seconds. But to the uninitiated, an engine can look like a jumble of metal and wires. See more »

Ever wonder what the difference is between a gasoline engine and a diesel engine? Diesels are more efficient and cheaper to run than gasoline engines. Learn what makes diesel engines different! See more »

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! See more »

You may think your dreams of fuel economy can be fulfilled only by a car with a diesel engine, but direct injection engines offer another option for high efficiency and performance. How do they differ from standard gas engines? See more »

The traditional water pump is a relatively simple, belt-driven component. But could an electric water pump be more efficient and more in tune with your engine's specific cooling needs? See more »