Where is the location and how to check and replace the PCV valve in Mercury Mariner with four-cylinder engines?

If the model is 2004 and earlier, then you need to start the engine and detach the PCV valve from the valve cover. Check for a vacuum at the end of the valve. If there is no vacuum, take out the valve and check if there is a vacuum in the hose. Change it if necessary. Inspect whether the rubber grommet is damaged or not. Clean and examine your hose. You should install a new PCV valve if required. For models 2005-2008, you need to remove your intake manifold and disconnect a hose from a PCV valve. Remove a valve from a crankcase oil separator. Installation will be vice versa. If it's 2009 or later models, then the PCV valve refers to one of parts of the crankcase oil separator.

Genuine Mercury Mariner PCV Valve

Position Crank Ventilation Valve

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6 PCV Valves found

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Mercury Mariner Valve Assembly
Part Number: 4L5Z-6A666-AA
$12.40 MSRP: $17.60
You Save: $5.20 (30%)
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Product Specifications
- Other Name: Valve Assy
- Replaced by: KR3Z-6A666-B
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2008 Mercury Mariner | 6 Cyl 3.0L DOHC EFI Modular | 4AT CD4E, 5-Speed Manual Transmission, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Right Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive, Two-Wheel Drive (Left Hand Drive), Two-Wheel Drive (Right Hand Drive)
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Mercury Mariner Valve Assembly
Part Number: 2C5Z-6A666-AA
$78.10 MSRP: $129.09
You Save: $50.99 (40%)
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Product Specifications
- Other Name: Valve Assy; PCV 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 | 6 Cyl 3.0L OHC Duratec | 4AT CD4E, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Mercury Mariner Valve Assembly
Part Number: 8S4Z-6A666-A
$32.72 MSRP: $52.18
You Save: $19.46 (38%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Valve Assy; PCV Valve
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2009-2011 Mercury Mariner | 4 Cyl 2.5L Duratec (110kW/150PS), 4 Cyl 2.5L PFI Gas/Electric | 4AT CD4E, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Mercury Mariner Valve Assembly
Part Number: 3L8Z-6A666-AD
$86.79 MSRP: $143.45
You Save: $56.66 (40%)
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Product Specifications
- Other Name: Valve Assy; PCV Valve
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005 Mercury Mariner | 4 Cyl 2.3L, 4 Cyl 2.3L Hybrid Gas/Electric DOHC | 4AT CD4E, 5-Speed Manual Transmission, 5-Speed Manual Transmission - AK, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Right Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive, Two-Wheel Drive (Left Hand Drive), Two-Wheel Drive (Right Hand Drive)
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Mercury Mariner Valve Assembly
Part Number: 4L5Z-6A666-BA
$16.87 MSRP: $26.91
You Save: $10.04 (38%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Valve Assy; PCV Valve
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2008 Mercury Mariner | 4 Cyl 2.3L, 4 Cyl 2.3L Hybrid Gas/Electric DOHC | 4AT CD4E, 5-Speed Manual Transmission, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Right Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive, Two-Wheel Drive (Left Hand Drive), Two-Wheel Drive (Right Hand Drive)
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Mercury Mariner Valve Assembly
Part Number: 5L8Z-6A666-AA
$136.49 MSRP: $341.82
You Save: $205.33 (61%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Valve Assy
- Manufacturer Note: Heated
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2006 Mercury Mariner | 6 Cyl 3.0L DOHC EFI Modular | 4AT CD4E, 5-Speed Manual Transmission, 5-Speed Manual Transmission - AK, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Right Hand Drive), Left Hand Drive, Two-Wheel Drive (Left Hand Drive), Two-Wheel Drive (Right Hand Drive)

Mercury Mariner PCV Valve

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.

We provide a wide range of Mercury Mariner PCV Valve at the best prices possible. If you need Mercury Mariner PCV Valve, you can shop with confidence on our website. All our OEM parts come with a manufacturer's warranty and are delivered to your door step with a fast delivery service.

Mercury Mariner PCV Valve Parts Questions & Experts Answers

Valve Assembly
3L8Z-6A666-AD
Q: Where is the location and how to check and replace the PCV valve in Mercury Mariner with four-cylinder engines?
A: If the model is 2004 and earlier, then you need to start the engine and detach the PCV valve from the valve cover. Check for a vacuum at the end of the valve. If there is no vacuum, take out the valve and check if there is a vacuum in the hose. Change it if necessary. Inspect whether the rubber grommet is damaged or not. Clean and examine your hose. You should install a new PCV valve if required. For models 2005-2008, you need to remove your intake manifold and disconnect a hose from a PCV valve. Remove a valve from a crankcase oil separator. Installation will be vice versa. If it's 2009 or later models, then the PCV valve refers to one of parts of the crankcase oil separator.