Stock OEM-style PCV valves have remained unchanged for over 50 years. A typical stock-style PCV has one airflow channel; the air flow through this channel is controlled by a spring actuated piston.

GM began installing PCV valves on its 1961 vehicles destined for California and it was an industry mainstay by the mid '60s. PCV valves have come in all shapes and sizes over the years, and style ...

Somewhere along this PCV hose, there's a control valve of sorts called a ... With age, this hose may collapse, obstructing the flow of vapors through the PCV system. A clogged or severely restricted ...

The PCV (Positive Crankcase Ventilation) system is designed to regulate and remove fumes from the engine crankcase, and to alleviate crankcase pressure which could cause oil leaks or seal damage ...

Q. I have a ’96 Honda Accord EX with 42,000 miles. Recently, I brought it to my local garage to have the valves adjusted (they seem to be “rapping” a little, and I thought that ma… ...