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

The Positive Crankcase Ventilation mechanism vents gasoline fumes native the crankcase through the input of the engine whereby they are disposed that through combustion in the cylinder. Gas fumes in the crankcase room a natural product of blow-by, which occurs to some degree in even a brand brand-new engine due to the fact that a perfect seal in between a piston ring and also cylinder is difficult to achieve. Engines used to vent this gas fumes into the atmosphere through a little filter an installed on the valve cover(s). However, modern-day emission standards need these fumes be disposed that in a much more environmentally trusted manner, and thus the PCV device 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 might be some crossover years w/ regard to part numbers; constantly verify fitment.


The PCV valve is basically a check valve the ensures the circulation of crankcase fumes just occurs native the crankcase come the intake manifold, and also not the intake manifold to the crankcase. End time, the PCV valve has tendency to end up being coked v oil and also related contaminates, hindering its operation. Symptom of a faulty PCV valve include bad idle high quality (rough idle), engine hesitation, ns of throttle response, too much fuel in the engine oil, and also decreased fuel economy. The location and also orientation that the PCV valve might vary by version year and engine. The complying with procedures are based upon the 2002 come 2004 model years, however lay the structure for PCV valve replacement on any type of 1997 to 2010 Triton V-8.

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• find the PCV valve. This 2 valve 4.6L V-8 has 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 location is not universal for every 4.6L/5.4L engines. If you"re having challenge locating it, reference the replacement component and map all hoses leading right into the entry 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 might simply be a slip-fit style. Part models may have actually a heated PCV valve that calls for an electrical connector be removed.


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• ~ above this layout (reference image), the PCV is eliminated by turning it counter clockwise 90 degrees with a wrench. Part PCV valves will be held in place by 2 small bolts (3 valve 5.4L V-8s, for example). Eliminate the bolts and pull the PCV valve out. Some engines may additionally have a PCV valve that merely slips right into place.


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

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