A small gap with big importance in the performance and health of an engine - here's everything you need to know.

Inside the engine are several fascinating parts, which you can see in Figure 7-8. At the top are the cylinder heads. These contain the mechanisms that allow the valves to open and close, letting the ...

both street and dragstrip duty. Nearly 15 years later, the engine has seen more than a dozen dyno pulls topping out at 893 hp and 740 lb-ft of torque, countless trips down the strip with and without ...

Metal valve covers can last longer, but modern cars use plastic because they're cheaper and lightweight, reducing cost and ...

Your engine is composed of many moving parts and pieces. In order to move through the four stages of internal combustion, all of these bits and bobs are quite necessary. Some engines, however, take ...

General Motors has issued a service update for 2021 model year full-size truck and SUV models that are being shipped to dealerships and may be affected by valve lifter problems. The hazards: this ...

A class action lawsuit filed against GM over alleged faulty lifters in certain V8 engines has still not received class action ...