According to J.D. Power, the PCV valve has been a part of just about every car engine since 1961, and it helps control emissions. As with any part, the PCV valve wears out, and since it's exposed ...

You take your car in for an oil change. The work is almost done when the technician comes out to talk to you. Hes holding your air filter and PCV valve and recommending that you replace both ...

Separating the crankcase from the intake manifold, which is a source of varying air pressure, the PCV valve maintains the optimal level of vacuum in the crankcase to extract the products of blow ...

Popular Mechanics’s automotive experts outline the tools and techniques proven to smoke out even the toughest to find vacuum ...