Can broken valve springs and defective valve stem seals be replaced without removing the cylinder head in four cylinder engine on Mercury Capri?

Valve springs and valve stem seals can be replaced without removal of cylinder head; normally it requires two special tools and compressed air. If there is no compressed air the valves can be secured in place using a length of nylon rope to stop them falling into the cylinder. Start with the removal of the camshaft cover, spark plug from Cylinder head with defective component or all spark plugs where replacing all valve stem seals. Rotate the crankshaft until the piston in the affected cylinder is at the TDC of the compression stroke and if doing all the seals, start with cylinder number one and do in the firing order sequence. Take an adapter and insert it into the spark plug fitting that is frequently used in connection with your air hose, and use the compressed air in order to secure the valves. In case of lack of air pressure, place the piston as near to top dead centre as possible on the compression stroke and push into the combustion chamber a nylon rope with its end left exposed for withdrawal. Plug up the cylinder head holes with shop rags so that no contaminants can get into the engine, then, use a valve spring compressor to compress the spring. After compressing the spring, take out the cam follower and the lash adjuster, the keepers, the spring retainer, the damper assembly and the valve spring. Remove the valve stem seal and if air pressure cannot retain the valve closed, you may be looking at a hassle with the valve face or seat that would require removal of the cylinder heads to have it fixed. Put a piece of a rubber band or an adhesive tape around the valve stem with the intention of preventing it from falling off.Now, allow the pressure to fade and give the valve stem a good check to ensure it rotates in the guide as required. Reverse the valve to keep it shut by applying air pressure, apply engine oil the valve stem and fit a new umbrella type guide seal. Put the installation cap on the stem of the valve, fit the valve stem seal over the cap and screw down till the seal is in contact with the guide. Take off the cap and insert, with a special installation tool or screwdrivers, the seal to the valve guide. It fits the valve spring, damper and retainer; compress the spring then fit the keepers; lash adjuster to be fitted along with cam follower. Release from the spark plug hole the air hose and the adapter if used or pull out the used rope as well. Last, replace the parts that were unbolted, turn on the engine, and look for possible signs like dripping oil or foreign noises emanating from the region of the camshaft cover.

Genuine Mercury Valve Stem Seal

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36 Valve Stem Seals found

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Mercury Valve Stem Seal
Part Number: YF1Z-6571-CA
$13.73 MSRP: $18.75
You Save: $5.02 (27%)
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Product Specifications
- Other Name: Seal - Valve Stem; Valve Seals
Fits the following Mercury Models:
- Sable | 1999-2005 | 6 Cyl 3.0L | 4AT 4F50N, 4AT AX4N, 4AT AX4S, 6AT
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Mercury Valve Stem Seal
Part Number: E8AZ-6571-A
$13.73 MSRP: $18.75
You Save: $5.02 (27%)
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Product Specifications
- Other Name: Seal - Valve Stem
- Replaces: F1HZ-6049-A, E43Z-6571-A, FOTZ-6049-K
Fits the following Mercury Models:
- Capri | 1985-1986 | 4 Cyl 2.3L, 6 Cyl 3.8L, 8 Cyl 5.0L | 3AT C3, 3AT C5, 4AT AOD, 4MT, 5MT
- Cougar | 1986-1989 | 4 Cyl 2.3L, 6 Cyl 3.8L, 8 Cyl 5.0L | 3AT C5, 4AT AOD, 5MT
- Grand Marquis | 1985-1990 | 8 Cyl 5.0L, 8 Cyl 5.8L | 4AT AOD
- Marquis | 1985-1986 | 4 Cyl 2.3L, 6 Cyl 3.8L | 3AT C3
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Mercury Valve Stem Seal
Part Number: BL3Z-6571-A
$2.63 MSRP: $3.75
You Save: $1.12 (30%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Seal - Valve Stem; Valve Seals
- Manufacturer Note: 4 Per Package
- Replaces: 7T4Z-6571-AA
Fits the following Mercury Models:
- Milan | 2007-2011 | 6 Cyl 3.5L DOHC VCT SMPI | 5-Speed Automatic Transmission Mazda FNR5, 5-Speed Manual Transmission (G5M), 6-Speed Automatic Transaxle - AWF21, 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Manual Transmission Mazda G6M, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
- Sable | 2008-2009 | 6 Cyl 3.5L DOHC VCT SMPI | 6-Speed Automatic Transaxle - AWF21, 6-Speed Automatic Transmission 6F50, CVT Select Shift Transmission, Four-Wheel Drive (Part Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Mercury Valve Stem Seal
Part Number: 3L3Z-6571-DA
$5.08 MSRP: $7.23
You Save: $2.15 (30%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Seal - Valve Stem; Valve Seals
- Manufacturer Note: SEAL, VALVE STEM
- Replaces: 3L3Z-6571-CA
Fits the following Mercury Models:
- Mountaineer | 2006-2010 | 8 Cyl 4.6L | 5-Speed Automatic Transmission 5R55S, 5-Speed Automatic Transmission 5R55W, 5-Speed Manual Transmission (M5R4), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission 6R60, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Right Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Mercury Valve Stem Seal
Part Number: F4AZ-6571-A
$6.28 MSRP: $9.38
You Save: $3.10 (34%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Seal - Valve Stem; Valve Seals
- Replaces: F4AZ-6049-A, F3AZ-6049-A
Fits the following Mercury Models:
- Cougar | 1994-1997 | 8 Cyl 4.6L | 4AT, 4AT 4R70W, 4AT AODE
- Grand Marquis | 1993-2011 | 8 Cyl 4.6L, 8 Cyl 4.6L Romeo SOHC EFI | 4-Speed Automatic Transmission 4R75E Livonia, 4AT, 4AT 4R70W, 4AT AODE, Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Mercury Valve Stem Seal
Part Number: F5LY-6571-A
$1.67 MSRP: $2.39
You Save: $0.72 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Seal - Valve Stem; Valve Seals
Fits the following Mercury Models:
- Grand Marquis | 2003-2006 | 8 Cyl 4.6L | 4AT 4R70W
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Mercury Valve Stem Seal
Part Number: F5RZ-6571-B
$1.92 MSRP: $2.73
You Save: $0.81 (30%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Seal - Valve Stem
Fits the following Mercury Models:
- Cougar | 1999-2002 | 6 Cyl 2.5L | 4AT CD4E, 5MT
- Mariner | 2005-2011 | 6 Cyl 3.0L DOHC EFI Modular, 6 Cyl 3.0L OHC Duratec | 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)
- Milan | 2006-2011 | 6 Cyl 3.0L DOHC EFI, 6 Cyl 3.0L OHC Duratec | 5-Speed Automatic Transmission Mazda FNR5, 5-Speed Manual Transmission (G5M), 6-Speed Automatic Transaxle - AWF21, 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Manual Transmission Mazda G6M, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
- Montego | 2005-2007 | 6 Cyl 3.0L DOHC EFI Modular | 6-Speed Automatic Transaxle - AWF21, CVT Select Shift Transmission, Four-Wheel Drive (Part Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
- Mystique | 1995-2000 | 6 Cyl 2.5L | 4AT CD4E, 5MT
- Sable | 1996-2005 | 6 Cyl 3.0L | 4AT 4F50N, 4AT AX4N, 4AT AX4S, 6AT
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Mercury Valve Stem Seal
Part Number: F6AZ-6571-AA
$2.12 MSRP: $3.16
You Save: $1.04 (33%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Seal - Valve Stem
- Replaced by: DC2Z-6571-A
Fits the following Mercury Models:
- Grand Marquis | 1996 | 8 Cyl 4.6L | 4AT 4R70W
- Mountaineer | 2002-2005 | 8 Cyl 4.6L Romeo SOHC EFI | 5-Speed Automatic Transmission 5R55S, 5-Speed Automatic Transmission 5R55W, 5-Speed Manual Transmission (M5R4), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission 6R60, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Right Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Mercury Valve Stem Seal
Part Number: F77Z-6571-AB
$2.93 MSRP: $4.38
You Save: $1.45 (34%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Seal - Valve Stem; Valve Seals
- Manufacturer Note: SOHC
Fits the following Mercury Models:
- Mountaineer | 2002-2010 | 6 Cyl 4.0L SOHC EFI | 5-Speed Automatic Transmission 5R55S, 5-Speed Automatic Transmission 5R55W, 5-Speed Manual Transmission (M5R4), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission 6R60, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Right Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Mercury Valve Stem Seal
Part Number: F3ZZ-6571-C
$1.85 MSRP: $2.63
You Save: $0.78 (30%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Seal - Valve Stem
- Manufacturer Note: Used on Intake & Exhaust valves
Fits the following Mercury Models:
- Cougar | 1993 | 8 Cyl 5.0L | 4AT AOD
- Mountaineer | 1997-2001 | 8 Cyl 5.0L | 4AT 4R70W, 5AT 5R55E
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Mercury Valve Stem Seal
Part Number: 1F2Z-6571-AA
$2.69 MSRP: $3.83
You Save: $1.14 (30%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Seal - Valve Stem; Valve Seals
- Manufacturer Note: Intake & Exhaust
- Replaces: XF2Z-6571-BA
Fits the following Mercury Models:
- Monterey | 2004-2007 | 6 Cyl 3.9L OHV EFI NA, 6 Cyl 4.2L OHV EFI | 4AT AX4N, Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Mercury Valve Stem Seal
Part Number: 1S7Z-6571-EA
$13.73
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Seal - Valve Stem
- Replaced by: 1S7Z-6571-A
Fits the following Mercury Models:
- Mariner | 2005-2011 | 4 Cyl 2.3L, 4 Cyl 2.3L Hybrid Gas/Electric DOHC, 4 Cyl 2.5L Duratec (110kW/150PS), 4 Cyl 2.5L PFI Gas/Electric | 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)
- Milan | 2006-2011 | 4 Cyl 2.3L, 4 Cyl 2.5L Duratec HE PFI, 4 Cyl 2.5L PFI Gas/Electric | 5-Speed Automatic Transmission Mazda FNR5, 5-Speed Manual Transmission (G5M), 6-Speed Automatic Transaxle - AWF21, 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Manual Transmission Mazda G6M, 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 Valve Stem Seal
Part Number: 3S4Z-6571-AA
$5.01 MSRP: $7.13
You Save: $2.12 (30%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Seal - Valve Stem
- Replaced by: 3S4Z-6571-A
Fits the following Mercury Models:
- Mariner | 2005-2011 | 4 Cyl 2.3L, 4 Cyl 2.3L Hybrid Gas/Electric DOHC, 4 Cyl 2.5L Duratec (110kW/150PS), 4 Cyl 2.5L PFI Gas/Electric | 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)
- Milan | 2006-2011 | 4 Cyl 2.3L, 4 Cyl 2.5L Duratec HE PFI, 4 Cyl 2.5L PFI Gas/Electric | 5-Speed Automatic Transmission Mazda FNR5, 5-Speed Manual Transmission (G5M), 6-Speed Automatic Transaxle - AWF21, 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Manual Transmission Mazda G6M, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
View related parts
Mercury Valve Stem Seal
Part Number: 7T4Z-6571-AA
$2.63 MSRP: $3.75
You Save: $1.12 (30%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Seal - Valve Stem
- Replaced by: BL3Z-6571-A
Fits the following Mercury Models:
- Milan | 2007-2010 | 6 Cyl 3.5L DOHC VCT SMPI | 5-Speed Automatic Transmission Mazda FNR5, 5-Speed Manual Transmission (G5M), 6-Speed Automatic Transaxle - AWF21, 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Manual Transmission Mazda G6M, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
- Sable | 2008-2009 | 6 Cyl 3.5L DOHC VCT SMPI | 6-Speed Automatic Transaxle - AWF21, 6-Speed Automatic Transmission 6F50, CVT Select Shift Transmission, Four-Wheel Drive (Part Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
View related parts
Mercury Valve Stem Seal
Part Number: YF1Z-6571-DA
$13.73 MSRP: $18.75
You Save: $5.02 (27%)
ADD TO CART
Product Specifications
- Other Name: Seal - Valve Stem; Valve Seals
Fits the following Mercury Models:
- Sable | 1999-2005 | 6 Cyl 3.0L | 4AT 4F50N, 4AT AX4N, 4AT AX4S, 6AT
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Mercury Valve Stem Seal
Part Number: E7ZZ-6571-A
$13.73 MSRP: $18.75
You Save: $5.02 (27%)
ADD TO CART
Product Specifications
- Other Name: Seal - Valve Stem; Intake Valve Seals, Valve Seals
Fits the following Mercury Models:
- Capri | 1980-1986 | 4 Cyl 2.3L, 6 Cyl 3.3L, 6 Cyl 3.8L, 8 Cyl 4.2L, 8 Cyl 5.0L | 3AT C3, 3AT C4, 3AT C5, 4AT AOD, 4MT, 5MT
- Cougar | 1991-1992, 1980-1989 | 4 Cyl 2.3L, 6 Cyl 3.3L, 6 Cyl 3.8L, 8 Cyl 4.2L, 8 Cyl 5.0L | 3AT C3, 3AT C4, 3AT C5, 4AT AOD, 4MT, 5MT
- Grand Marquis | 1991, 1980-1989 | 8 Cyl 4.2L, 8 Cyl 5.0L, 8 Cyl 5.8L | 3AT, 3AT C4, 3AT C6, 4AT AOD
- Marquis | 1983-1986 | 4 Cyl 2.3L, 6 Cyl 3.3L, 6 Cyl 3.8L | 3AT C3, 3AT C5, 4MT
- Sable | 1986-1989 | 4 Cyl 2.5L, 6 Cyl 3.0L, 6 Cyl 3.8L | 3AT ATX, 4AT AXOD
- Topaz | 1984-1994 | 4 Cyl 2.0L, 4 Cyl 2.3L | 3AT ATX, 4MT, 5MT
- Tracer | 1987-1989 | 4 Cyl 1.6L | 3AT ATX, 4AT 4EAT, 4AT F4E-III, 4AT IF4E, 4MT, 5MT
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Mercury Valve Stem Seal
Part Number: F2TZ-6571-A
$13.73 MSRP: $18.75
You Save: $5.02 (27%)
ADD TO CART
Product Specifications
- Other Name: Seal - Valve Stem; Exhaust Valve Seals, Valve Seals
- Replaces: E5ZZ-6571-A
Fits the following Mercury Models:
- Grand Marquis | 1986-1989 | 8 Cyl 5.0L, 8 Cyl 5.8L | 4AT AOD
- Marquis | 1986 | 4 Cyl 2.3L, 6 Cyl 3.8L | 3AT C3
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Mercury Valve Stem Seal
Part Number: E6DZ-6571-A
$13.73 MSRP: $18.75
You Save: $5.02 (27%)
ADD TO CART
Product Specifications
- Other Name: Seal - Valve Stem; Exhaust Valve Seals, Valve Seals
Fits the following Mercury Models:
- Sable | 1986-1999 | 4 Cyl 2.5L, 6 Cyl 3.0L, 6 Cyl 3.8L | 3AT ATX, 4AT 4F50N, 4AT AX4N, 4AT AX4S, 4AT AXOD, 4AT AXOD-E
- Topaz | 1992-1994 | 6 Cyl 3.0L | 3AT ATX, 5MT
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Mercury Valve Stem Seal
Part Number: F57Z-6571-A
$1.46 MSRP: $2.08
You Save: $0.62 (30%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Seal - Valve Stem
- Manufacturer Note: Intake & Exhaust
Fits the following Mercury Models:
- Cougar | 1996-1997 | 6 Cyl 3.8L | 4AT 4R70W
View related parts
Mercury Valve Stem Seal
Part Number: YS4Z-6571-CA
$3.66 MSRP: $5.22
You Save: $1.56 (30%)
ADD TO CART
Product Specifications
- Other Name: Seal - Valve Stem
- Replaces: F6RZ-6571-CA, F8CZ-6571-AA
Fits the following Mercury Models:
- Cougar | 1999-2002 | 4 Cyl 2.0L | 4AT CD4E, 5MT
- Mystique | 1996-2000 | 4 Cyl 2.0L | 4AT CD4E, 5MT
- Tracer | 1998-1999 | 4 Cyl 2.0L | 4AT F4E-III, 5MT
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Mercury Valve Stem Seal

We offer a wide variety of genuine Mercury Valve Stem Seals at competitive prices online. Our OEM Mercury Valve Stem Seals come with the assurance of a manufacturer's warranty, alongside a hassle-free return policy and prompt delivery service, ensuring a worry-free shopping experience.

Mercury Valve Stem Seal Parts Questions & Experts Answers

Valve Stem Seal
E7ZZ-6571-A
Q: Can broken valve springs and defective valve stem seals be replaced without removing the cylinder head in four cylinder engine on Mercury Capri?
A:
Valve springs and valve stem seals can be replaced without removal of cylinder head; normally it requires two special tools and compressed air. If there is no compressed air the valves can be secured in place using a length of nylon rope to stop them falling into the cylinder. Start with the removal of the camshaft cover, spark plug from Cylinder head with defective component or all spark plugs where replacing all valve stem seals. Rotate the crankshaft until the piston in the affected cylinder is at the TDC of the compression stroke and if doing all the seals, start with cylinder number one and do in the firing order sequence. Take an adapter and insert it into the spark plug fitting that is frequently used in connection with your air hose, and use the compressed air in order to secure the valves. In case of lack of air pressure, place the piston as near to top dead centre as possible on the compression stroke and push into the combustion chamber a nylon rope with its end left exposed for withdrawal. Plug up the cylinder head holes with shop rags so that no contaminants can get into the engine, then, use a valve spring compressor to compress the spring. After compressing the spring, take out the cam follower and the lash adjuster, the keepers, the spring retainer, the damper assembly and the valve spring. Remove the valve stem seal and if air pressure cannot retain the valve closed, you may be looking at a hassle with the valve face or seat that would require removal of the cylinder heads to have it fixed. Put a piece of a rubber band or an adhesive tape around the valve stem with the intention of preventing it from falling off.Now, allow the pressure to fade and give the valve stem a good check to ensure it rotates in the guide as required. Reverse the valve to keep it shut by applying air pressure, apply engine oil the valve stem and fit a new umbrella type guide seal. Put the installation cap on the stem of the valve, fit the valve stem seal over the cap and screw down till the seal is in contact with the guide. Take off the cap and insert, with a special installation tool or screwdrivers, the seal to the valve guide. It fits the valve spring, damper and retainer; compress the spring then fit the keepers; lash adjuster to be fitted along with cam follower. Release from the spark plug hole the air hose and the adapter if used or pull out the used rope as well. Last, replace the parts that were unbolted, turn on the engine, and look for possible signs like dripping oil or foreign noises emanating from the region of the camshaft cover.

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