Intake valves open and close to let the air-fuel mixture (or just air in some modern engines) enter the cylinders, and the exhaust valves allow exhaust gases to escape. Too much or too little ...

"Some believe having a double spring makes them safer, because if the main ... the exhaust valves, the stock ones were compared with heavier single-piece, stainless valves from Racing Engine ...

All four phases occur within a single cycle of the rotor, rather than one at a time in a four-stroke piston engine. There is also no need for a minimum of two valves (intake and exhaust ...

The Cummins engine is well-known due to its power and reliability, but when did it start using an EGR? Here's what it is and ...

On engines with the intake and exhaust cam lobes ground on the ... See All 11 Photos The Viper's main oil control valve is combined with the solenoid and mounts to the top of the block.

Bypassing the turbo at startup heats the main catalyst quickly ... scavenging of residual exhaust. As installed on a Chinese Qoros 1.6-liter 16-valve I-4 engine, the Freevalve system lowers ...

It's springtime! Time to start working on your project car, learn a new wrenching skill, discover what everything is under the hood (and how it works), or just spruce up your daily driver.

This stuck valve allowed "liquid oxygen to flow from the main injector [for the rocket ... the turbo is powered by the exhaust from the engine that spins a small turbine fan on a shaft.

and exhaust. Combustion pushes the pistons down from the top of the cylinder. As engines need air to burn fuel, during intake, valves open up and allow ambient air to come in. When the piston reaches ...