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

The Positive Crankcase Ventilation device vents gasoline fumes indigenous the crankcase with the entry of the engine wherein they are disposed the through burning in the cylinder. Gas fumes in the crankcase are a herbal product that blow-by, which wake up to some level in also a brand brand-new engine due to the fact that a perfect seal in between a piston ring and cylinder is difficult to achieve. Engines offered to vent these gas fumes right into the setting through a tiny filter an installed on the valve cover(s). However, contemporary emission standards require these fumes be disposed of in a much more environmentally friendly manner, and thus the PCV device is used.


Applicable model 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/ to the to component numbers; constantly verify fitment.


The PCV valve is essentially a inspect valve the ensures the circulation of crankcase fumes just occurs from the crankcase to the input manifold, and also not the entry manifold come the crankcase. Over time, the PCV valve often tends to come to be coked v oil and also related contaminates, hindering that operation. Symptom of a faulty PCV valve include bad idle top quality (rough idle), engine hesitation, loss of accelerator response, excessive fuel in the engine oil, and decreased fuel economy. The location and orientation of the PCV valve may vary by version year and engine. The adhering to procedures are based upon the 2002 to 2004 model years, however lay the foundation for PCV valve instead of on any type of 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 inserted into the passenger side valve cover. Part 3 valve 5.4L engines will have actually the PCV located on the driver next valve cover. The place is not global for every 4.6L/5.4L engines. If you"re having an obstacle locating it, reference the replacement part and trace all hoses leading into the entry manifold/plenum.


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


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• top top this layout (reference image), the PCV is gotten rid of by turning it respond to clockwise 90 degrees with a wrench. Part PCV valves will be hosted in place by 2 tiny bolts (3 valve 5.4L V-8s, because that 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 hose and, if applicable, the hose clamp and wiring exploit connector.

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