Purge Valve: What It Is, How It Works, And Why Proper Maintenance Matters

The emissions system of your car does a lot to help make its exhaust more bearable to deal with. But it wouldn't be nearly as ...
Hot Rod

Auto Shop Series: Cams, Valves And Valve Gear

An engine is like a safe deposit box with two locks. You can unlock one of these with such keys as carburetors, manifolds and ignition. But you can't open it up and get all the performance you want ...
Jalopnik

How Does Variable Valve Timing Work?

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. All month, ...
Motor Trend

Three-Valve Intake Manifold Dyno Test - Three's A Crowd

There is no question that the DOHC 5.0L Coyote engine has taken Mustang performance to new levels, and the spotlight, but if you have a Three-Valve 4.6L, there are still a lot of performance options ...
GM Authority

GM Gen. 5 Small Block Deep Dive Part II: The LT1 Valvetrain, Intake, Exhaust And Cylinder Heads

For Part I, covering the new combustion system, direct injection, and active fuel management: click here. For Part III, covering the block, crankshaft and lubrication systems: click here. Continuing ...