Dodge dakota 2002 Service Manual page 2847

25 - 18 EVAPORATIVE EMISSIONS
PCV VALVE (Continued)
Fig. 12 LOCATION 5.7L PCV VALVE
1 - TOP OF INTAKE MANIFOLD
2 - THROTTLE BODY
3 - AIR RESONATOR
4 - PCV VALVE
Fig. 13 5.7L PCV VALVE
1 - PCV VALVE
2 - O-RINGS
3 - ALIGNMENT TABS
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 man-
Fig. 14 PCV VALVE/HOSE - 5.9L V-8
1 - PCV VALVE
2 - PCV VALVE HOSE CONNECTIONS
ifold. The PCV system manages crankcase pressure
and meters blow by gases to the intake system,
reducing engine sludge formation.
Fig. 15 TYPICAL CLOSED CRANKCASE
VENTILATION SYSTEM
1 - THROTTLE BODY
2 - AIR CLEANER
3 - AIR INTAKE
4 - PCV VALVE
5 - COMBUSTION CHAMBER
6 - BLOW-BY GASES
7 - CRANKCASE BREATHER/FILTER
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.
When the engine is not operating or during an
engine pop-back, the spring forces the plunger back
against the seat (Fig. 16). This will prevent vapors
from flowing through the valve.
DR