RAM 3500 Truck 4WD L6-5.9L DSL Turbo VIN C (2002)
Positive Crankcase Ventilation Valve: Description and Operation
All 5 9L V-8 gas powered engines are equipped with a closed crankcase ventilation system and a Positive Crankcase Ventilation (PCV) valve. The 8.0L
V-10 engine is not equipped with a PCV valve. Refer to Crankcase Ventilation System-8.0L V-10 Engine for information.
Fig.3 Typical PCV Valve/Hose (Non-California Shown)
This system consists of a PCV valve mounted on the cylinder head (valve) cover with a hose extending from the valve to the intake manifold. Another
hose connects the opposite cylinder head (valve) cover to the air cleaner housing to provide a source of clean air for the system. A separate crankcase
breather/filter is not used.
Fig.4 Typical Closed Crankcase Ventilation System
The PCV system operates by engine intake manifold vacuum. Filtered air is routed into the crankcase through the air cleaner hose. The metered air,
along with crankcase vapors, are drawn through the PCV valve and into a passage in the intake manifold. The PCV system manages crankcase pressure
and meters blow by gases to the intake system, reducing engine sludge formation.
The PCV valve contains a spring loaded plunger. This plunger meters the amount of crankcase vapors routed into the combustion chamber based on
intake manifold vacuum.
