How to Service and Repair Valve Stem Seals on Mercury Grand Marquis?

The service and repair of valve stem seals requires the fire suppression system to be depowered because serious personal injury can occur. A hoisted vehicle needs to be placed in neutral mode. First, remove valve springs before extracting valve stem seals from their locations. The installation process requires the new valve stem seals to be seated all the way onto the valve seat with the garter spring properly situated inside the seal. The installation process requires use of the valve spring compressor together with the valve stem oil seal installer. The valves require valve springs to be installed once all seals have been positioned correctly. Follow safety procedures and necessary protocols to test the fire suppression system after installing it into vehicles that utilize this system.

How to Service and Repair Valve Stem Seals on Mercury Mariner?

The repair and service of the valve guide seals starts with proper cleanliness to stop foreign substances from entering oil or coolant channels that result in complete engine breakdown. The service requires positioning the vehicle on a hoist and setting the vehicle neutral while removing camshafts. When using existing camshafts and valve tappets, mark original locations because the numerical code behind the decimal point indicates the precise size (example: 0.650 shows 3.650 millimeters of dimension). The compressed air supply at 7-10 bars (100-150 psi) must be connected to cylinder No.1 spark plug holes until the valve spring retainer installation to protect the valve from entering the cylinder. Compressed air should be applied to the cylinder before using Valve Spring Compressors to squeeze the valve spring while removing the valve collet with a small screwdriver and multi-purpose grease. The valve spring retainer and spring should then be installed. The Valve Stem Oil Seal Remover partnered with the Slide Hammer allows the technician to remove the current valve stem seal before disposing of it. Begin by placing the valve stem seal installation sleeve before using the Valve Stem Oil Seal Installer to install the new valve stem seal while checking the proper positioning of the valve collet. The valve spring must be reinstated using the Valve Spring Compressors before valve spring retainer and collet installation with required applications of multi-purpose grease. After disconnecting compressed air supply, continue the removal and installation actions for the other cylinders. Place clean engine oil on valve tappets followed by reinstallation of the camshafts.

OEM Mercury Valve Stem Seal

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28 Valve Stem Seals found

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Mercury Valve Seals Part Number: DC2Z-6571-A
$2.27 MSRP: $3.22
You Save: $0.95 (30%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Seal - Valve Stem; Valve Stem Seal
- Replaces: F6AZ-6571-AA
Fits the following Mercury Models:
- Cougar | 1994-1997 | XR-7 | 8 Cyl 4.6 L GAS
- Grand Marquis | 1994-2006 | GS, GSL, Limited Edition, LS, LSE, Ultimate Edition | 8 Cyl 4.6 L FLEX, 8 Cyl 4.6 L GAS
- Marauder | 2003-2004 | Base | 8 Cyl 4.6 L GAS
- Mountaineer | 2002-2005 | Base, Convenience, Luxury, Premier | 8 Cyl 4.6 L GAS
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Mercury Valve Seals, Green Part Number: 3S4Z-6571-A
$5.52 MSRP: $7.83
You Save: $2.31 (30%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Seal - Valve Stem; Valve Stem Seal
- Replaces: 3S4Z-6571-AA, 1S7Z-6571-FA
Fits the following Mercury Models:
- Mariner | 2005-2011 | Base, Convenience, Hybrid, Premier | 4 Cyl 2.3 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.5 L GAS
- Milan | 2006-2011 | Base, Hybrid, Premier | 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.5 L GAS
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Mercury Valve Seals, Brown/Gray Part Number: 1S7Z-6571-A
$13.78
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Product Specifications
- Other Name: Seal - Valve Stem; Valve Stem Seal
- Replaces: 1S7Z-6571-EA, 1S7Z-6571-BA
Fits the following Mercury Models:
- Mariner | 2005-2011 | Base, Convenience, Hybrid, Premier | 4 Cyl 2.3 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.5 L GAS
- Milan | 2006-2011 | Base, Hybrid, Premier | 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.5 L GAS
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Mercury Valve Seals Part Number: 3L3Z-6571-DA
$5.19 MSRP: $7.37
You Save: $2.18 (30%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Seal - Valve Stem; Engine Valve Stem Oil Seal Set; Valve Stem Oil Seal Set; Valve Stem Seal
- Manufacturer Note: SEAL, VALVE STEM
- Replaces: 3L3Z-6571-CA
Fits the following Mercury Models:
- Mountaineer | 2006-2010 | Luxury, Premier | 8 Cyl 4.6 L GAS
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Mercury Valve Seals Part Number: F5LY-6571-A
$2.48 MSRP: $3.51
You Save: $1.03 (30%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Seal - Valve Stem; Engine Valve Stem Oil Seal Set; Valve Stem Oil Seal Set; Valve Stem Seal
Fits the following Mercury Models:
- Grand Marquis | 2003-2004 | GS, LS, LSE | 8 Cyl 4.6 L GAS
- Marauder | 2003-2004 | Base | 8 Cyl 4.6 L GAS
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Mercury Valve Seals Part Number: 1F2Z-6571-AA
$2.97 MSRP: $4.22
You Save: $1.25 (30%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Seal - Valve Stem; Engine Valve Stem Oil Seal Set; Valve Stem Oil Seal Set; Valve Stem Seal
- Manufacturer Note: Intake & Exhaust
- Replaces: XF2Z-6571-BA
Fits the following Mercury Models:
- Monterey | 2004-2007 | Base, Convenience, Luxury, Premier | 6 Cyl 4.2 L GAS
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Mercury Valve Seals Part Number: BL3Z-6571-A
$2.69 MSRP: $3.82
You Save: $1.13 (30%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Seal - Valve Stem; Valve Stem Seal
- Manufacturer Note: 4 Per Package
- Replaces: 7T4Z-6571-AA
Fits the following Mercury Models:
- Sable | 2008-2009 | Base, Premier | 6 Cyl 3.5 L GAS
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Mercury Valve Seals Part Number: YF1Z-6571-DA
$13.78 MSRP: $18.75
You Save: $4.97 (27%)
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Product Specifications
- Other Name: Seal - Valve Stem; Valve Stem Seal
Fits the following Mercury Models:
- Sable | 1999-2005 | GS, LS | 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
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Mercury Seal - Valve Stem Part Number: E5ZZ-6571-A
$13.78 MSRP: $18.75
You Save: $4.97 (27%)
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Product Specifications
- Replaced by: F2TZ-6571-A
Fits the following Mercury Models:
- Capri | 1984-1986 | GS, RS Turbo | 4 Cyl 2.3 L GAS
- Cougar | 1991, 1985-1986 | LS, XR-7 | 4 Cyl 2.3 L GAS, 8 Cyl 5.0 L GAS
- Marquis | 1985-1986 | Base, Brougham | 4 Cyl 2.3 L GAS
- Sable | 1986 | GS | 4 Cyl 2.5 L GAS
- Topaz | 1984-1989 | Base, GS, GS AWD, LS, LS AWD, LTS, Sport, Sport AWD, XR5 | 4 Cyl 2.3 L GAS
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Mercury Valve Seals Part Number: F2TZ-6571-A
$13.78 MSRP: $18.75
You Save: $4.97 (27%)
ADD TO CART
Product Specifications
- Other Name: Seal - Valve Stem; Engine Valve Stem Oil Seal Set; Valve Stem Oil Seal Set; Valve Stem Seal; Exhaust Valve Seals
- Replaces: E5ZZ-6571-A
Fits the following Mercury Models:
- Cougar | 1992 | LS, XR-7 | 8 Cyl 5.0 L GAS
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Mercury Valve Seals Part Number: YF1Z-6571-CA
$13.78 MSRP: $18.75
You Save: $4.97 (27%)
ADD TO CART
Product Specifications
- Other Name: Seal - Valve Stem; Engine Valve Stem Oil Seal Set; Valve Stem Oil Seal Set; Valve Stem Seal
Fits the following Mercury Models:
- Sable | 1999-2005 | GS, LS | 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
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Mercury Valve Seals Part Number: F57Z-6571-A
$1.62 MSRP: $2.29
You Save: $0.67 (30%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Seal - Valve Stem; Engine Valve Stem Oil Seal Set; Valve Stem Oil Seal Set; Valve Stem Seal; Exhaust Valve Seals; Intake Valve Seals
- Manufacturer Note: Intake & Exhaust
Fits the following Mercury Models:
- Cougar | 1996-1997 | XR-7 | 6 Cyl 3.8 L GAS
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Mercury Valve Seals Part Number: F3XY6571A
Product Specifications
- Other Name: Seal - Valve Stem; Valve Stem Seal
Fits the following Mercury Models:
- Villager | 1993 | GS, LS | 6 Cyl 3.0 L GAS
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Mercury Valve Seals Part Number: F4XY6571A
Product Specifications
- Other Name: Seal - Valve Stem; Valve Stem Seal
Fits the following Mercury Models:
- Villager | 1994-1998 | GS, LS, Nautica | 6 Cyl 3.0 L GAS
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Mercury Valve Seals Part Number: 1S4Z-6571-AA
Product Specifications
- Other Name: Seal - Valve Stem; Engine Valve Stem Oil Seal Set; Valve Stem Oil Seal Set; Valve Stem Seal
- Replaces: F1CZ-6571-A
Fits the following Mercury Models:
- Tracer | 1991-1999 | Base, GS, LS, Trio | 4 Cyl 1.9 L GAS, 4 Cyl 2.0 L GAS
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Mercury Valve Seals Part Number: F1AZ-6571-A
Product Specifications
- Other Name: Seal - Valve Stem; Valve Stem Seal
- Manufacturer Note: Intake & Exhaust
Fits the following Mercury Models:
- Grand Marquis | 1992-1993 | GS, LS | 8 Cyl 4.6 L GAS
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Mercury Valve Seals Part Number: F3XY6571B
Product Specifications
- Other Name: Seal - Valve Stem; Valve Stem Seal
Fits the following Mercury Models:
- Villager | 1993 | GS, LS | 6 Cyl 3.0 L GAS
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Mercury Valve Seals Part Number: E6DZ-6571-D
Product Specifications
- Other Name: Seal - Valve Stem; Valve Stem Seal; Intake Valve Seals
- Replaces: F6DZ-6571-DA
Fits the following Mercury Models:
- Sable | 1986-1999 | G, GS, LS, LS Premium, LTS | 6 Cyl 3.0 L GAS
- Topaz | 1992-1994 | GS, LTS, Sport, XR5 | 6 Cyl 3.0 L GAS
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Mercury Valve Seals Part Number: E7ZZ-6571-B
Product Specifications
- Other Name: Seal - Valve Stem; Valve Stem Seal; Exhaust Valve Seals
Fits the following Mercury Models:
- Topaz | 1990-1994 | GS, GS AWD, LS, LS AWD, LTS, LTS AWD, Sport, Sport AWD, XR5, XR5 AWD | 4 Cyl 2.3 L GAS
View related parts
Mercury Valve Seals Part Number: XF5Z6571AA
Product Specifications
- Other Name: Seal - Valve Stem; Valve Stem Seal
Fits the following Mercury Models:
- Villager | 1999-2002 | Base, Estate, Sport | 6 Cyl 3.3 L GAS

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Mercury Valve Stem Seal

If you own Mercury and want to keep it in top shape, choosing OEM Valve Stem Seal is a smart move. They are precisely engineered and follow strict factory standards. They are made in advanced facilities that use cutting edge technology. Each part goes through thorough testing to confirm strength and safety, so you can trust it. FordPartsDeal.com gives you genuine Mercury Valve Stem Seal at some of the affordable online prices without cutting quality. Every OEM Mercury part includes the manufacturer's warranty, easy returns, and super-fast delivery. So why wait? Shop now and get your vehicle back to peak condition.

Mercury Valve Stem Seal Parts and Q&A

Valve Seals
F4AZ-6571-A
Q: How to Service and Repair Valve Stem Seals on Mercury Grand Marquis?
A:
The service and repair of valve stem seals requires the fire suppression system to be depowered because serious personal injury can occur. A hoisted vehicle needs to be placed in neutral mode. First, remove valve springs before extracting valve stem seals from their locations. The installation process requires the new valve stem seals to be seated all the way onto the valve seat with the garter spring properly situated inside the seal. The installation process requires use of the valve spring compressor together with the valve stem oil seal installer. The valves require valve springs to be installed once all seals have been positioned correctly. Follow safety procedures and necessary protocols to test the fire suppression system after installing it into vehicles that utilize this system.
Valve Seals, Brown/Gray
1S7Z-6571-A
Q: How to Service and Repair Valve Stem Seals on Mercury Mariner?
A:
The repair and service of the valve guide seals starts with proper cleanliness to stop foreign substances from entering oil or coolant channels that result in complete engine breakdown. The service requires positioning the vehicle on a hoist and setting the vehicle neutral while removing camshafts. When using existing camshafts and valve tappets, mark original locations because the numerical code behind the decimal point indicates the precise size (example: 0.650 shows 3.650 millimeters of dimension). The compressed air supply at 7-10 bars (100-150 psi) must be connected to cylinder No.1 spark plug holes until the valve spring retainer installation to protect the valve from entering the cylinder. Compressed air should be applied to the cylinder before using Valve Spring Compressors to squeeze the valve spring while removing the valve collet with a small screwdriver and multi-purpose grease. The valve spring retainer and spring should then be installed. The Valve Stem Oil Seal Remover partnered with the Slide Hammer allows the technician to remove the current valve stem seal before disposing of it. Begin by placing the valve stem seal installation sleeve before using the Valve Stem Oil Seal Installer to install the new valve stem seal while checking the proper positioning of the valve collet. The valve spring must be reinstated using the Valve Spring Compressors before valve spring retainer and collet installation with required applications of multi-purpose grease. After disconnecting compressed air supply, continue the removal and installation actions for the other cylinders. Place clean engine oil on valve tappets followed by reinstallation of the camshafts.