What Is A 12-Valve Cummins (And How Is It Different From A 24-Valve?)
In turn, the reliability of Cummins 12-valve builds has become the stuff of diesel engine legend. Read more: 15 Popular Oil ...
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PCV Valve
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 ...