How to replace the PCV Valve in a 4.6L or 5.4L V-8

The Positive Crankcase Ventilation device vents gasoline fumes from the crankcase v the intake of the engine whereby they room disposed that through burning in the cylinder. Gas fumes in the crankcase room a herbal product of blow-by, which wake up to some level in also a brand new engine since a perfect seal in between a piston ring and also cylinder is difficult to achieve. Engines supplied to vent these gas fumes right into the environment through a small filter an installed on the valve cover(s). However, contemporary emission standards require these fumes it is in disposed the in a an ext environmentally friendly manner, and thus the PCV system is used.


Applicable model Years: 1997 - 2010 Ford F-150, 4.6L and 5.4L V-8 1997 - 2001 PCV valve: Motorcraft EV233 (Ford F7UZ-6A666-CA) 2002 - 2004 PCV valve: Motorcraft EV258 (Ford 2L3E-6A666-AA) 2005 PCV valve: Motorcraft EV259 (Ford 4L2E-6A666-BA) 2006 - 2010 PCV valve: Motorcraft EV279 (Ford 6W72-6A666-AA) keep in mind - there may be some crossover year w/ regard to part numbers; always verify fitment.


The PCV valve is essentially a examine valve the ensures the flow of crankcase fumes only occurs native the crankcase to the input manifold, and also not the intake manifold come the crankcase. Over time, the PCV valve often tends to come to be coked through oil and also related contaminates, hindering its operation. Symptom of a faulty PCV valve include negative idle quality (rough idle), engine hesitation, lose of accelerator response, extreme fuel in the engine oil, and also decreased fuel economy. The location and orientation that the PCV valve may vary by design year and engine. The adhering to procedures are based on the 2002 come 2004 version years, but lay the foundation for PCV valve replacement on any type of 1997 to 2010 Triton V-8.

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• locate the PCV valve. This 2 valve 4.6L V-8 has actually the PCV put into the passenger next valve cover. Part 3 valve 5.4L engines will have actually the PCV situated on the driver next valve cover. The place is not universal for all 4.6L/5.4L engines. If you"re having challenge locating it, referral the replacement part and trace all hoses leading into the input manifold/plenum.


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• eliminate the water tap at the outlet that the PCV valve. This may have actually a water tap clamp, or it may simply it is in a slip-fit style. Some models may have a heated PCV valve that needs an electrical connector be removed.


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• on this layout (reference image), the PCV is gotten rid of by transforming it counter clockwise 90 degrees with a wrench. Some PCV valves will certainly be held in location by 2 tiny bolts (3 valve 5.4L V-8s, for example). Eliminate the bolts and pull the PCV valve out. Part engines may also have a PCV valve that just slips into place.


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• Reinstall the PCV valve water tap and, if applicable, the water tap clamp and also wiring exploit connector.

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