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

An environment should be clean, and the vehicle must be on the hoist in neutral to service the valve guide seals. Take out camshafts, labeling tappet positions where reusing. Break off spark plugs, spray compress air on cylinder No. 1, and utilise valve spring compressors to strip off and put seals in place. Repeat on rest of cylinders, and re-fit camshafts.

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

In order to service the valve guide seals, turn off the fire suppression system. Lift the vehicle with a hoist, detach the valve springs and the seals. Install new seals so that they sit properly. Take out the springs and restart the fire suppression system taking precautions.

OEM Mercury Valve Stem Seal

Engine Valve 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%)
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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%)
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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%)
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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%)
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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
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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; 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
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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 Parts and Q&A

Valve Seals, Brown/Gray
1S7Z-6571-A
Q: How to Service and Repair Valve Stem Seals on Mercury Mariner?
A: An environment should be clean, and the vehicle must be on the hoist in neutral to service the valve guide seals. Take out camshafts, labeling tappet positions where reusing. Break off spark plugs, spray compress air on cylinder No. 1, and utilise valve spring compressors to strip off and put seals in place. Repeat on rest of cylinders, and re-fit camshafts.
Valve Seals
F4AZ-6571-A
Q: How to Service and Repair Valve Stem Seals on Mercury Grand Marquis?
A: In order to service the valve guide seals, turn off the fire suppression system. Lift the vehicle with a hoist, detach the valve springs and the seals. Install new seals so that they sit properly. Take out the springs and restart the fire suppression system taking precautions.