How to Service and Repair the PCV Valve on Mercury Mariner?

Service and repair operations on the Positive Crankcase Ventilation (PCV) valve begin by placing your vehicle in neutral position then hoisting it for work. Next, remove the intake manifold. The PCV valve cap should be gently released from its two tabs before pulling out the PCV valve itself. The installation process requires performing the reversal steps of removal.

OEM Mercury Mariner PCV Valve

Position Crank Ventilation Valve

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6 PCV Valves found

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Mercury Mariner PCV Valve Part Number: 2L5Z-6A666-BA
$24.39 MSRP: $38.73
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Product Specifications
- Other Name: Kit - Crankcase Ventilation Valve; Crankcase Vent Valve
- Manufacturer Note: SOHC
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2007 Mercury Mariner | Luxury, Premier | 6 Cyl 3.0 L GAS
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Mercury Mariner PCV Valve Part Number: 8S4Z-6A666-A
$39.73 MSRP: $63.09
You Save: $23.36 (38%)
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Product Specifications
- Other Name: Valve Assembly; Crankcase Vent Valve
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2009-2011 Mercury Mariner | Base, Hybrid, Premier | 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.5 L GAS
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Mercury Mariner PCV Valve Part Number: 4L5Z-6A666-BA
$17.29 MSRP: $27.45
You Save: $10.16 (38%)
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Product Specifications
- Other Name: Valve Assembly; Crankcase Vent Valve
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2008 Mercury Mariner | Base, Hybrid | 4 Cyl 2.3 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.3 L GAS
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Mercury Mariner PCV Valve Part Number: 3L8Z-6A666-AD
$104.64 MSRP: $172.18
You Save: $67.54 (40%)
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Product Specifications
- Other Name: Valve Assembly; Crankcase Vent Valve
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2007 Mercury Mariner | Base, Convenience, Hybrid | 4 Cyl 2.3 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.3 L GAS
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Mercury Mariner PCV Valve Part Number: 2C5Z-6A666-AA
$80.02 MSRP: $131.67
You Save: $51.65 (40%)
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Product Specifications
- Other Name: Valve Assembly; Crankcase Vent Valve
- Manufacturer Note: With Electric Heated PCV
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2009-2011 Mercury Mariner | Base, Premier | 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
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Mercury Mariner PCV Valve Part Number: KR3Z-6A666-B
$12.99 MSRP: $21.09
You Save: $8.10 (39%)
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Product Specifications
- Other Name: Valve Assembly; Crankcase Vent Valve
- Replaces: 4L5Z-6A666-AA, EV-267
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2008 Mercury Mariner | Base, Premier | 6 Cyl 3.0 L GAS

Mercury Mariner PCV Valve

OEM PCV Valve boasts unmatched quality. Each part goes through full quality checks. They adhere to Mercury's official factory standards. These steps remove flaws and inconsistencies. So you can get PCV Valve with long life and a perfect fit. Come to our website and find genuine Mercury Mariner parts. We keep a wide inventory of OEM Mariner parts at the highly affordable prices. It's easy to search, compare, and pick what you need. You'll love the clear info and simple checkout. We offer top-rated customer service, and we reply fast. We also ship promptly to ensure your order arrives on time.

The PCV Valve in Mercury Mariner consists of a collection of car elements which plays an important role for cutting down mercury emissions and improving the Mariner engine performance. The PCV Valve and the hose directs these combustion byproduct gases back into the engine's combustion chamber thereby negating the effects of polluting the environment and the engine's accumulation of destructive oil sludge. Depending on the intake manifold vacuum conditions, PCV Valve has a tendency of limiting gas flow at idle, thus avoiding lean running of the engine while at the same time, the same valve has a tendency of allowing fresh air into the crankcase at higher RPMs or under loads to handle with excess blow-by gases. This mechanism is useful in fulfilling the ventilation of crankcase gases and at the same time not affect the operation of the engine. In addition, the PCV Valve serve to functions as flame arrestor to ensure the crankcase does not suffer positive pressure events like turbo charging or back firing. It should be noted that failure to maintain the PCV Valve perfect could lead to a situation where the engine oil gets contaminated with other materials, there could be oil leaks and the car begins to have a high rate of fuel consumption.

Mercury Mariner PCV Valve Parts and Q&A

PCV Valve
3L8Z-6A666-AD
Q: How to Service and Repair the PCV Valve on Mercury Mariner?
A:
Service and repair operations on the Positive Crankcase Ventilation (PCV) valve begin by placing your vehicle in neutral position then hoisting it for work. Next, remove the Intake Manifold. The PCV valve cap should be gently released from its two tabs before pulling out the PCV valve itself. The installation process requires performing the reversal steps of removal.