The PCV valve (positive crankcase ventilation valve) is a vital part of the emissions controlsystem on most vehicles. Not every vehicle has a PCV valve, but most do. If yours has one, and if your ...

Cylinder heads are understandably a vital ingredient in any recipe for "porcupine" horsepower pie, so whether the big-block in your Corvette is being built for street performance, drag racing, road ...

Q–My 1985 Ford Crown Victoria, which I purchased new, now has 118,000 miles on it. I had the oil changed every 3,000 miles and the car runs like new. When I had the oil changed this week, the mechanic ...

A PCV system takes into account performance and emissions, but with a big emphasis on emissions. It's supposed to reduce pressure. In a perfect world, we'd like to see 0 psi in the crankcase but this ...