Chrysler 4648973AA Valve-PCV

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The Positive Crankcase Ventilation (PCV) system reduces hydrocarbon emissions by scavenging vapors from the crankcase. It consists of a PCV valve, a fresh air filtered inlet, and vacuum hoses. To maintain idle quality, the PCV valve restricts the flow when the intake manifold vacuum is high. To check the valve's operation, with the engine running at idle, pull the valve out and place your finger over the valve inlet. A strong vacuum should be felt and a hissing noise should be heard if the valve is operating properly. Cleaning the old valve is not recommended.

The PCV valve is found in the valve cover top in inline engines, left-side valve cover in 3.BLV6, and rear of the right-side valve cover in 3.6L V6. For inline and 3.8L V6 engines, remove the valve from its grommet and hose, noting its position. In the 3.8L engine, it's near the ignition coil pack. For 3.6L V6, loosen the hose clamp, remove screws, and pull the valve from the right valve cover. Inspect the rubber grommet or 0-ring for damage and replace if needed. Secure the valve and hose into position and tighten screws for 3.6L V6. Later Inline six-cylinder models use a CCV system with a rubber fitting connected to the intake manifold by a plastic hose. If there's no vacuum, clean the hose and fitting orifice, or replace if damaged. Securely install the fitting and hose in the valve cover.

The PCV system consists of the PCV valve and two hoses. The fresh air inlet hose connects the air filter housing to the valve cover (2.4L four) or to the front valve cover (3.3U3.8L V6). The crankcase ventilation hose (or PCV hose) connects the valve cover (2.4L four) or the rear valve cover (3.3L/3.8L V6) to the intake manifold. The PCV valve is located at the valve cover end of the crankcase ventilation hose that connects to the intake manifold.