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

The Positive Crankcase Ventilation system vents petrol fumes native the crankcase through the intake of the engine wherein they are disposed of through combustion in the cylinder. Gas fumes in the crankcase room a organic product that blow-by, which occurs to some level in also a brand new engine since a perfect seal in between a piston ring and cylinder is impossible to achieve. Engines supplied to vent this gas fumes into the environment through a small filter mounted on the valve cover(s). However, contemporary emission standards require these fumes it is in disposed that in a much more environmentally friendly manner, and thus the PCV system is used.


Applicable version Years: 1997 - 2010 Ford F-150, 4.6L and also 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) note - there might be some crossover year w/ regard to part numbers; constantly verify fitment.


The PCV valve is basically a examine valve that ensures the flow of crankcase fumes just occurs from the crankcase to the intake manifold, and also not the entry manifold come the crankcase. End time, the PCV valve tends to end up being coked with oil and also related contaminates, hindering its operation. Symptoms of a faulty PCV valve include negative idle high quality (rough idle), engine hesitation, lose of throttle response, extreme fuel in the engine oil, and decreased fuel economy. The location and also orientation of the PCV valve may vary by version year and engine. The following procedures are based upon the 2002 to 2004 design years, however lay the foundation for PCV valve replacement on any 1997 come 2010 Triton V-8.

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• situate the PCV valve. This 2 valve 4.6L V-8 has the PCV put into the passenger next valve cover. Some 3 valve 5.4L engines will have actually the PCV situated on the driver next valve cover. The location is not global for every 4.6L/5.4L engines. If you"re having difficulty locating it, referral the replacement part and map 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 a hose clamp, or it may simply be a slip-fit style. Some models may have actually a cook PCV valve that needs an electrical connector be removed.


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• on this style (reference image), the PCV is removed by transforming it counter clockwise 90 levels with a wrench. Some PCV valves will be held in place by 2 tiny 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 simply 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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