RAM 3500 HD Truck 2WD L6-6.7L DSL Turbo VIN A (2007)
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.
Fig. 6 Engine Off Or Engine Pop-Back - No Vapor Flow
When the engine is not operating or during an engine pop-back, the spring forces the plunger back against the seat. This will prevent vapors from
flowing through the valve.
Fig. 7 High Intake Manifold Vacuum - Minimal Vapor Flow
During periods of high manifold vacuum, such as idle or cruising speeds, vacuum is sufficient to completely compress spring. It will then pull the
plunger to the top of the valve. In this position there is minimal vapor flow through the valve.
Fig. 8 High Intake Manifold Vacuum - Maximum Vapor Flow
During periods of moderate manifold vacuum, the plunger is only pulled part way back from inlet. This results in maximum vapor flow through the
valve.