How Do I Change a PCV Valve on a 2007 Jeep Liberty?
- 1). Raise the hood of your Liberty and rest it on the prop rod. Locate the PCV valve protruding from the back of the left cylinder head.
- 2). Pull the rubber hose straight back off the end of the PCV valve. Unscrew the PCV valve from the mounting area, by hand. Discard the old valve. Thread the replacement PCV valve into the mounting area, by hand, until it is secure.
- 3). Push the rubber hose back onto the end of the new valve. Push the hose back until it stops, making sure it is tight. Close the hood of the Liberty.
Source...