How can broken valve springs and defective valve stem seals be replaced without removing the cylinder heads in 2.8L V6 engine on Mercury Capri?

One of a set of broken valve springs and a faulty valve stem seal can be repaired easily without removal of cylinder head; the job may call for two specialized tools and compressed air. Occasionally one may not have access to compressed air and in such a case he or she can use a length of nylon rope to keep the valve from falling into the cylinder. Start by eliminating the rocker arm cover from the affected cylinder head and if all the valve stem seals are to be changed, then both covers must be taken. Then, if only one component of the solenoid or LSA is to be tested or replaced, then take out the spark plug from the cylinder where the faulty component is installed, and if all seals are to be replaced then take out all spark plugs. When directed push the starter until you hear a click; turn the crankshaft counterclockwise until the marks align with Top Dead Center on the compression stroke; start with cylinder number one and apply the firing order. A plug an adapter into the spark plug hole and attach one end of an air hose to a container filled with compressed air. The rocker arm assembly should also be removed together with the pull out of the pushrods in the serviced cylinders. Put compressed air into the cylinder with the help of this system so that the valves are in place by the pressure. In case of air pressure failure, another technique involves operation of the piston a little before TDC on the compression stroke in which a long nylon rope is inserted through the spark plug hole. employing shop rags in order to avoid dropping on any part into the engine afterward compress the spring with a valve spring compressor and then remove the locks. If the air pressure is unable to provide sufficient force to keep the valve closed, then the valve face or seat is likely to be ruined and these will have to be addressed whilst the cylinder head is off. Coil a rubber band or tape around the valve stem to stop it from becoming lodged in the combustion chamber, and then discharge the air pressure. Check for signs of wear on the valve stem, to make sure it can slide smoothly in its guide. Bleed air pressure to keep the valve closed, spread grease on a valve stem with engine oil, and put a new seal. Centre the spring on the valve, the valve spring retainer is then placed on the spring followed by putting pressure on the spring and placing the locks very carefully. Take off the pressure from the spring tool and finally make sure that the locks are well positioned. Release the air pressure in the air hose and then remove the adapter and finally fit on the rocker arms and the pushrods. Last, place the spark plugs back, join the wires and put the rocker arm covers in place after which start up the engine and look for traces of oil leaks and any unusual noises.

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
$2.23 MSRP: $3.16
You Save: $0.93 (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
$5.03 MSRP: $7.13
You Save: $2.10 (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
$5.10 MSRP: $7.23
You Save: $2.13 (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
$1.68 MSRP: $2.39
You Save: $0.71 (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
$2.70 MSRP: $3.83
You Save: $1.13 (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
$2.64 MSRP: $3.75
You Save: $1.11 (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
$1.47 MSRP: $2.08
You Save: $0.61 (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
View related parts
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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1-20 of 28 Results

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 prevents the entry of oil into the combustion chambers while valves glide and move well. Mercury came into being in 1938 and it took little time to cut its own niche with a combination of relaxing rides, straight edges, quiet cabins and the catchy name of the Roman messenger that promised it would be fast without chastisement at the pump. Mercury customers were fond of mid-size cars that went over potholes and still managed to appear sporty and they continued to keep buying them as value never choked the sense of style. The talk in Mercury showrooms was all about spacious benches, fingertip steering, and a cabin quietness that made the road journey less fatiguing to all those involved. When engines check the high mileage, the Mercury lineup is relying on the new Valve Stem Seal in order to create a strong wall, which prevents escapist oil from sneaking into the combustion chambers, blue smoke, catalytic converters, compression maintenance, freeing the stem to move and not scuff and keep its shape despite the red-hot pulses of the exhaust, frozen startups, and stop-and-go mistreatment. Once a new Valve Stem Seal beds down firmly in the guide, drivers report more stable idle, cleaner plugs and reduced oil loss. The Valve Stem Seal is made of heat-resistant polymers combined with durable elastomer rings and each one resists all types of varnish, endures both temperature changes, and ensures power is held steady over the mile.

Mercury Valve Stem Seal Parts and Q&A

Seal - Valve Stem
E5ZZ-6571-A
Q: How can broken valve springs and defective valve stem seals be replaced without removing the cylinder heads in 2.8L V6 engine on Mercury Capri?
A:
One of a set of broken valve springs and a faulty valve stem seal can be repaired easily without removal of cylinder head; the job may call for two specialized tools and compressed air. Occasionally one may not have access to compressed air and in such a case he or she can use a length of nylon rope to keep the valve from falling into the cylinder. Start by eliminating the rocker arm cover from the affected cylinder head and if all the valve stem seals are to be changed, then both covers must be taken. Then, if only one component of the solenoid or LSA is to be tested or replaced, then take out the spark plug from the cylinder where the faulty component is installed, and if all seals are to be replaced then take out all spark plugs. When directed push the starter until you hear a click; turn the crankshaft counterclockwise until the marks align with Top Dead Center on the compression stroke; start with cylinder number one and apply the firing order. A plug an adapter into the spark plug hole and attach one end of an air hose to a container filled with compressed air. The rocker arm assembly should also be removed together with the pull out of the pushrods in the serviced cylinders. Put compressed air into the cylinder with the help of this system so that the valves are in place by the pressure. In case of air pressure failure, another technique involves operation of the piston a little before TDC on the compression stroke in which a long nylon rope is inserted through the spark plug hole. employing shop rags in order to avoid dropping on any part into the engine afterward compress the spring with a valve spring compressor and then remove the locks. If the air pressure is unable to provide sufficient force to keep the valve closed, then the valve face or seat is likely to be ruined and these will have to be addressed whilst the cylinder head is off. Coil a rubber band or tape around the valve stem to stop it from becoming lodged in the combustion chamber, and then discharge the air pressure. Check for signs of wear on the valve stem, to make sure it can slide smoothly in its guide. Bleed air pressure to keep the valve closed, spread grease on a valve stem with engine oil, and put a new seal. Centre the spring on the valve, the valve spring retainer is then placed on the spring followed by putting pressure on the spring and placing the locks very carefully. Take off the pressure from the spring tool and finally make sure that the locks are well positioned. Release the air pressure in the air hose and then remove the adapter and finally fit on the rocker arms and the pushrods. Last, place the spark plugs back, join the wires and put the rocker arm covers in place after which start up the engine and look for traces of oil leaks and any unusual noises.