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

The Positive Crankcase Ventilation mechanism vents petrol fumes indigenous the crankcase with the intake of the engine whereby they are disposed the through burning in the cylinder. Gas fumes in the crankcase space a organic product that blow-by, which wake up to some degree in even a brand new engine because a perfect seal between a piston ring and cylinder is impossible to achieve. Engines used to vent these gas fumes right into the atmosphere through a little filter mounted on the valve cover(s). However, contemporary emission standards call for these fumes it is in disposed the in a more environmentally familiar manner, and thus the PCV mechanism 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 might be part crossover years w/ to the to component numbers; always verify fitment.


The PCV valve is essentially a examine valve the ensures the circulation of crankcase fumes only occurs from the crankcase to the input manifold, and not the entry manifold to the crankcase. Over time, the PCV valve tends to end up being coked through oil and related contaminates, hindering the operation. Symptom of a faulty PCV valve include negative idle top quality (rough idle), engine hesitation, lose of accelerator response, extreme fuel in the engine oil, and also decreased fuel economy. The location and also orientation that the PCV valve might vary by design year and engine. The following procedures are based on the 2002 come 2004 version years, but lay the foundation for PCV valve instead of 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 inserted into the passenger side valve cover. Some 3 valve 5.4L engines will have actually the PCV situated on the driver side valve cover. The location is not global for all 4.6L/5.4L engines. If you"re having difficulty locating it, referral the replacement component and map all hoses leading right into the intake manifold/plenum.


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


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• top top this format (reference image), the PCV is eliminated by transforming it counter clockwise 90 degrees with a wrench. Some PCV valves will be held in place by 2 small bolts (3 valve 5.4L V-8s, because that example). Eliminate the bolts and pull the PCV valve out. Part 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 hose clamp and wiring harness connector.

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