How do you change a PCV Valve on a 2005 Jeep LIberty?

Answer 1

On the 3.7 Liter V6 engine the PCV valve is located on the passenger side of the oil filler neck. The valve itself is a small black plastic device with a right angle bend in it. One end inserts into the oil filler neck and the other end has a hose attached to it. 1. Remove the hose from the PCV valve. 2. Turn the PCV valve counter-clockwise, approximately 90 degrees, until the retaining pin (can't see it when the valve is installed but its on the side of PCV valve, you should be able to get the idea if you look at the replacement PCV valve) is aligned with the slot on the oil filler neck. Once the pin and slot are aligned you will be able to wiggle the PCV valve out of the oil filler neck. The PCV valve has an o-ring that gives some slight resistance to removal. 3. Clean out the PCV valve mounting hole with some paper toweling or rag. Lubricate the new PCV valve o-ring with silicone spray, wd-40, petroleum jell or similar. This will help with insertion. 4. Install new PCV value in opposite order of removal. ---------------- Just wanted to add on to this in case your PCV valve in the '05 is the same as the '06+. In those years, on a 3.7L V6, there are 2 PCV valves. They are located at the rear of each bank of injectors/spark plug coils near the fire wall.

Attached to those valves is a black rubber hose approx. 6 inches long and curbed into a 90 degree turn. Those both then attach to black plastic tubing that joins at the front left of the engine at a T-fitting that goes into the airbox. To change the PCV valves in that scenario, you will need to pull off the black hose at each valve and undo screw each valve using a hex fitting. One that is attached to a socket is probably best. I do not know the size but it is larger than 1/2". They should unscrew like any other bolt and replaced. After replacing the valves, slide the black hose back onto the valves.