What is the purpose of the Positive Crankcase Ventilation (PCV) system and PCV Valve?

The Positive Crankcase Ventilation (PCV) system reduces hydrocarbon emissions by circulating fresh air from the air cleaner, mixing with blow-by gases, and rerouting through a PCV valve. The PCV system consists of a PCV valve, a fresh air-filtered inlet, and vacuum hoses, and the PCV valve is meant to restrict flow to maintain idle quality. On 2005 and later Expedition/Navigator models, an electric heating element is added to the PCV system.

Genuine Lincoln Navigator PCV Valve

Position Crank Ventilation Valve

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4 PCV Valves found

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Lincoln Navigator Valve Assembly
Part Number: AA5Z-6A666-D
- Other Name: Valve Assy
- Replaced by: KR3Z-6A666-A
$13.73
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Fits the following Vehicles:
2015-2019 Lincoln Navigator | 6 Cyl 3.5L GTDI | 10-Speed Automatic Transmission (10R80), 4-Speed Automatic Transmission E4OD(4R100), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission ZF 6HP26 Steptronic, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Lincoln Navigator Valve Assembly
Part Number: F75Z-6A666-BA
- Other Name: Valve Assy; PCV Valve
$5.29 MSRP: $8.44
You Save: $3.15 (38%)

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Fits the following Vehicles:
1998 Lincoln Navigator | 8 Cyl 5.4L | 4AT 4R100, 4AT E4OD
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Lincoln Navigator Valve Assembly
Part Number: YC3Z-6A666-CA
- Other Name: Valve Assy; PCV Valve
- Replaces: YC3Z-6A666-BB
$25.42 MSRP: $40.55
You Save: $15.13 (38%)

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Fits the following Vehicles:
2003-2004 Lincoln Navigator | 8 Cyl 5.4L DOHC EFI | 4-Speed Automatic Transmission E4OD(4R100), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission ZF 6HP26 Steptronic, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Lincoln Navigator Kit - Crankcase Ventilation Valve
Part Number: YC2Z-6K773-AA
$31.46 MSRP: $46.00
You Save: $14.54 (32%)

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Fits the following Vehicles:
2003-2004 Lincoln Navigator | 8 Cyl 5.4L DOHC EFI | 4-Speed Automatic Transmission E4OD(4R100), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission ZF 6HP26 Steptronic, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Lincoln Navigator PCV Valve Parts Questions & Answers

Valve Assembly
F75Z-6A666-BA
Q: What is the purpose of the Positive Crankcase Ventilation (PCV) system and PCV Valve?
A: The Positive Crankcase Ventilation (PCV) system reduces hydrocarbon emissions by circulating fresh air from the air cleaner, mixing with blow-by gases, and rerouting through a PCV valve. The PCV system consists of a PCV valve, a fresh air-filtered inlet, and vacuum hoses, and the PCV valve is meant to restrict flow to maintain idle quality. On 2005 and later Expedition/Navigator models, an electric heating element is added to the PCV system.