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

The Positive Crankcase Ventilation device vents petrol fumes from the crankcase v the intake of the engine wherein they space disposed that through burning in the cylinder. Gas fumes in the crankcase room a herbal product that blow-by, which wake up to some level 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 offered to vent this gas fumes into the atmosphere through a little filter mounted on the valve cover(s). However, contemporary emission standards require these fumes it is in disposed that in a more environmentally trusted manner, and also thus the PCV mechanism is used.


Applicable design 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 may be part crossover year w/ for to part numbers; constantly verify fitment.


The PCV valve is essentially a examine valve that ensures the circulation of crankcase fumes only occurs indigenous the crankcase to the intake manifold, and also not the entry manifold to the crankcase. End time, the PCV valve has tendency to end up being coked v oil and related contaminates, hindering that operation. Symptom of a faulty PCV valve include negative idle quality (rough idle), engine hesitation, ns of accelerator response, excessive fuel in the engine oil, and decreased fuel economy. The location and orientation that the PCV valve may vary by model year and also engine. The following procedures are based on the 2002 to 2004 version years, however lay the foundation for PCV valve instead of on any 1997 come 2010 Triton V-8.

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• situate the PCV valve. This 2 valve 4.6L V-8 has actually the PCV put into the passenger side valve cover. Some 3 valve 5.4L engines will have the PCV located on the driver next valve cover. The location is not global for every 4.6L/5.4L engines. If you"re having an obstacle locating it, referral the replacement component and map all hoses leading into the input manifold/plenum.


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• remove the hose at the outlet of the PCV valve. This may have a hose clamp, or it might 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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• ~ above this style (reference image), the PCV is gotten rid of by transforming it counter clockwise 90 levels with a wrench. Some PCV valves will be held in ar by 2 little bolts (3 valve 5.4L V-8s, for example). Eliminate the bolts and also pull the PCV valve out. Part engines may likewise have a PCV valve that simply slips right into place.


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

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