Heres what you need to know. The PCV (positive crankcase ventilation) valve is a one-way valve that recycles crankcase gases back into the engine to burn. A plugged PCV valve can result in a rough ...

The positive crankcase ventilation valve releases exhaust gas and unburned fuel from the engine block into the intake manifold. All engines allow some exhaust gases, unburned fuel and oil to ...

The report mentions that the failure could be traced to a damaged piston inside the engine, which allowed the crankcase to become pressurized and lose oil.