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.

OEM Mercury Mariner Valve Stem Seal

Engine Valve Seal

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3 Valve Stem Seals found

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Mercury Mariner 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
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2011 Mercury Mariner | 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
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Mercury Mariner Valve Seals, Green Part Number: 3S4Z-6571-A
$5.52 MSRP: $7.83
You Save: $2.31 (30%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Seal - Valve Stem; Valve Stem Seal
- Replaces: 3S4Z-6571-AA, 1S7Z-6571-FA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2011 Mercury Mariner | 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
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Mercury Mariner Valve Seals Part Number: F5RZ-6571-B
$2.12 MSRP: $3.00
You Save: $0.88 (30%)
Ships in 1 Business Day
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
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2011 Mercury Mariner | Base, Luxury, Premier | 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS

Mercury Mariner Valve Stem Seal

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Mercury Mariner 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.