Although some maintenance schedules include an interval for replacing the positive crankcase ventilation, or PCV, valve, others may not. In the latter case, a general recommendation is to replace the ...

We don't mean to be the harbingers of doom, but it's unwise to keep driving if your car's engine has a malfunctioning positive crankcase ventilation (PCV) system, particularly a bad PCV valve.

Every engine has some sort of crankcase breathing system. The internal combustion process creates pressure, some of which makes its way past the piston rings-along with fuel vapors-and into the rest ...

Regardless of what type of vehicle you drive, if it was built in the last few decades, its engine has some form of emissions control system designed to reduce the harmful environmental impacts of ...

All engines need some sort of crankcase pressure relief. Whether it's in the form of a simple breather, or a more effective PCV system, you need a way to vent blowby gases inherently generated by a ...

A car smelling like burning oil is usually caused by oil leaking onto hot engine parts (like the exhaust manifold) or internal engine failure. Common causes include failed valve cover gaskets, worn ...

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 ...