×
Live Chat
1-888-737-9766
Buick Parts
Cadillac Parts
Chevrolet Parts
GMC Parts
Hummer Parts
Oldsmobile Parts
Pontiac Parts
Saturn Parts
GM Accessories
Login/Register
My Account
Track Order
Help Center
Contact Us
Contact Us
Live Chat
or
1-888-737-9766
Buick Parts
Cadillac Parts
Chevrolet Parts
GMC Parts
GM Parts
Hummer Parts
Oldsmobile Parts
Pontiac Parts
Saturn Parts
GM Accessories
My Garage
My Account
Cart
Search Bar
Search by Part Number, Part Name, or Vehicle
Track Order
Help Center
Home
>
GM Valve Stem Oil Seal
, Engine Valve Seal
Genuine GM Valve Stem Oil Seal
Engine Valve Seal
Select Vehicle by Model
Select Vehicle by VIN
Select Vehicle by Model
Year
Make
Model
Go
or
Select Vehicle by VIN
Go
For the most accurate results, select vehicle by your VIN (Vehicle Identification Number).
106 Valve Stem Oil Seals found
View related parts
GM Seal Kit,Exhaust Valve Stem Oil
Part Number:
12482062
$41.42
MSRP:
$66.04
You Save: $24.62 (38%)
Ships in 1-3 Business Days
ADD TO CART
Make sure this part fits,
Select Vehicle
Product Specifications
Other Name:
SEAL KIT, Engine Valve; Valve Seal, Valve Spring
Fits the following GM Models:
Buick
| Allure
| 2008-2009
| 8 Cyl 5.3L
Buick
| LaCrosse
| 2008-2009
| 8 Cyl 5.3L
Buick
| Lucerne
| 2009-2011
| 6 Cyl 3.9L, 6 Cyl 3.9L Flex
Buick
| Rainier
| 2004-2007
| 8 Cyl 5.3L
Buick
| Terraza
| 2006-2007
| 6 Cyl 3.9L, 6 Cyl 3.9L Flex
Cadillac
| CTS
| 2009-2015, 2004-2005
| 8 Cyl 5.7L, 8 Cyl 6.2L
Cadillac
| Escalade
| 2002-2014
| 8 Cyl 5.3L, 8 Cyl 6.0L, 8 Cyl 6.0L Flex, 8 Cyl 6.2L, 8 Cyl 6.2L Flex
Chevrolet
| Avalanche
| 2002-2013
| 8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 6.0L
Chevrolet
| Camaro
| 2010-2015, 2001-2002
| 8 Cyl 5.7L, 8 Cyl 6.2L, 8 Cyl 7.0L
Chevrolet
| Colorado
| 2009-2012
| 8 Cyl 5.3L
View More
View related parts
GM Seal, Exhaust Valve Stem Oil
Part Number:
12564852
$13.05
MSRP:
$14.63
You Save: $1.58 (11%)
ADD TO CART
Make sure this part fits,
Select Vehicle
Product Specifications
Other Name:
SEAL, Engine Valve; Valve Seal
Replaces:
12558674
Fits the following GM Models:
Buick
| Roadmaster
| 1994-1996
| 8 Cyl 5.7L
Cadillac
| Escalade
| 1999-2000
| 8 Cyl 5.7L
Cadillac
| Fleetwood
| 1994-1996
| 8 Cyl 5.7L
Chevrolet
| Astro
| 2000-2005, 1997-1998
| 6 Cyl 4.3L
Chevrolet
| Blazer
| 1996-2005
| 6 Cyl 4.3L
Chevrolet
| C1500
| 1996-1999
| 8 Cyl 5.0L, 8 Cyl 5.7L
Chevrolet
| C2500
| 1996-2000
| 8 Cyl 5.0L, 8 Cyl 5.7L
Chevrolet
| C3500
| 1996-2000
| 8 Cyl 5.7L
Chevrolet
| Camaro
| 1994-1997
| 8 Cyl 5.7L
Chevrolet
| Caprice
| 1994-1996
| 8 Cyl 4.3L, 8 Cyl 5.7L
View More
View related parts
GM Seal Kit,Valve Stem Oil
Part Number:
19207664
$28.59
MSRP:
$47.33
You Save: $18.74 (40%)
Ships in 1-2 Business Days
ADD TO CART
Make sure this part fits,
Select Vehicle
Product Specifications
Other Name:
SEAL KIT, Engine Valve; Valve Seal
Fits the following GM Models:
Buick
| Allure
| 2010-2015, 2005-2008
| 6 Cyl 3.0L, 6 Cyl 3.6L
Buick
| Enclave
| 2008-2024
| 6 Cyl 3.6L
Buick
| Envision
| 2016-2020
| 4 Cyl 2.0L, 4 Cyl 2.5L
Buick
| LaCrosse
| 2018-2019, 2010-2016, 2005-2008
| 4 Cyl 2.5L, 6 Cyl 3.0L, 6 Cyl 3.6L
Buick
| Regal
| 2014-2020
| 4 Cyl 2.0L
Buick
| Rendezvous
| 2004-2005
| 6 Cyl 3.6L
Cadillac
| ATS
| 2013-2019
| 4 Cyl 2.0L, 4 Cyl 2.5L, 6 Cyl 3.6L
Cadillac
| CT4
| 2022-2024
| 6 Cyl 3.6L
Cadillac
| CT6
| 2016-2019
| 4 Cyl 2.0L
Cadillac
| CTS
| 2004-2019
| 4 Cyl 2.0L, 6 Cyl 2.8L, 6 Cyl 3.0L, 6 Cyl 3.6L
View More
View related parts
GM Seal Kit,Intake Valve Stem Oil
Part Number:
12482063
$36.39
MSRP:
$60.23
You Save: $23.84 (40%)
Ships in 1-3 Business Days
ADD TO CART
Make sure this part fits,
Select Vehicle
Product Specifications
Other Name:
SEAL KIT, Engine Valve; Valve Seal
Fits the following GM Models:
Buick
| Allure
| 2008-2009
| 8 Cyl 5.3L
Buick
| LaCrosse
| 2008-2009
| 8 Cyl 5.3L
Buick
| Lucerne
| 2009-2011
| 6 Cyl 3.9L, 6 Cyl 3.9L Flex
Buick
| Rainier
| 2004-2007
| 8 Cyl 5.3L
Buick
| Terraza
| 2006-2007
| 6 Cyl 3.9L, 6 Cyl 3.9L Flex
Cadillac
| CTS
| 2009-2015, 2004-2007
| 8 Cyl 5.7L, 8 Cyl 6.0L, 8 Cyl 6.2L
Cadillac
| Escalade
| 2002-2014
| 8 Cyl 5.3L, 8 Cyl 6.0L, 8 Cyl 6.0L Flex, 8 Cyl 6.2L, 8 Cyl 6.2L Flex
Chevrolet
| Avalanche
| 2002-2013
| 8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 6.0L
Chevrolet
| Camaro
| 2010-2015, 2001-2002
| 8 Cyl 5.7L, 8 Cyl 6.2L, 8 Cyl 7.0L
Chevrolet
| Colorado
| 2009-2012
| 8 Cyl 5.3L
View More
View related parts
GM Seal,Valve Stem Oil
Part Number:
24405819
$6.23
MSRP:
$9.81
You Save: $3.58 (37%)
Ships in 1-2 Business Days
ADD TO CART
Make sure this part fits,
Select Vehicle
Product Specifications
Other Name:
SEAL, Engine Valve; Valve Seal
Replaces:
12992414
Fits the following GM Models:
Chevrolet
| Aveo
| 2009-2011
| 4 Cyl 1.6L
Chevrolet
| Cruze
| 2011-2016
| 4 Cyl 1.8L
Chevrolet
| Sonic
| 2012-2018
| 4 Cyl 1.8L
Chevrolet
| Trax
| 2015-2020
| 4 Cyl 1.8L
Pontiac
| G3
| 2009-2010
| 4 Cyl 1.6L
Saturn
| Astra
| 2008-2009
| 4 Cyl 1.8L
View More
View related parts
GM Seal,Valve Stem Oil
Part Number:
97212994
$13.05
Ships in 1-2 Business Days
ADD TO CART
Make sure this part fits,
Select Vehicle
Product Specifications
Other Name:
SEAL, Engine Valve; Valve Seal
Fits the following GM Models:
Cadillac
| Escalade
| 2002-2005
Chevrolet
| Express
| 2006-2010
| 8 Cyl 6.6L Diesel
Chevrolet
| Silverado
| 2001-2010
| 8 Cyl 6.6L Diesel
Chevrolet
| Suburban
| 2001-2005
GMC
| Savana
| 2006-2010
| 8 Cyl 6.6L Diesel
GMC
| Sierra
| 2001-2010
| 8 Cyl 6.6L Diesel
GMC
| Yukon
| 2001-2005
View More
View related parts
GM Seal Asm,Exhaust Valve Stem Oil
Part Number:
88891775
$13.05
Ships in 1-3 Business Days
ADD TO CART
Make sure this part fits,
Select Vehicle
Product Specifications
Other Name:
SEAL, Engine Valve; Exhaust Valve Seal, Valve Seal
Replaces:
24507691
Fits the following GM Models:
Buick
| Allure
| 2005-2009
| 6 Cyl 3.8L
Buick
| LaCrosse
| 2005-2009
| 6 Cyl 3.8L
Buick
| Lesabre
| 1996-2005
| 6 Cyl 3.8L
Buick
| Lucerne
| 2006-2008
| 6 Cyl 3.8L
Buick
| Park Avenue
| 1995-2005
| 6 Cyl 3.8L
Buick
| Regal
| 1996-2004
| 6 Cyl 3.8L
Buick
| Riviera
| 1995-1999
| 6 Cyl 3.8L
Chevrolet
| Camaro
| 1995-2002
| 6 Cyl 3.8L
Chevrolet
| Impala
| 2000-2005
| 6 Cyl 3.8L
Chevrolet
| Lumina
| 1998-1999
| 6 Cyl 3.8L
View More
View related parts
GM Seal,Valve Stem Oil
Part Number:
24575582
$13.05
ADD TO CART
Make sure this part fits,
Select Vehicle
Product Specifications
Other Name:
SEAL, Engine Valve; Valve Seal
Fits the following GM Models:
Chevrolet
| Cavalier
| 1998-2002
| 4 Cyl 2.2L
Chevrolet
| S10
| 1998-2003
| 4 Cyl 2.2L, 4 Cyl 2.2L Flex
GMC
| Sonoma
| 1998-2003
| 4 Cyl 2.2L, 4 Cyl 2.2L Flex
Pontiac
| Sunfire
| 1998-2002
| 4 Cyl 2.2L
View More
View related parts
GM Seal,Intake Valve Stem Oil
Part Number:
10198818
$13.05
ADD TO CART
Make sure this part fits,
Select Vehicle
Product Specifications
Other Name:
SEAL, Engine Valve; Exhaust Valve Seal, Intake Valve Seal, Valve Seal
Fits the following GM Models:
Buick
| Century
| 1993-1996
| 4 Cyl 2.2L
Chevrolet
| Beretta
| 1992-1996
| 4 Cyl 2.2L
Chevrolet
| Cavalier
| 1992-1997
| 4 Cyl 2.2L
Chevrolet
| Corsica
| 1992-1996
| 4 Cyl 2.2L
Chevrolet
| S10
| 1994-1997
| 4 Cyl 2.2L
GMC
| Sonoma
| 1994-1997
| 4 Cyl 2.2L
Oldsmobile
| Cutlass
| 1993-1996
| 4 Cyl 2.2L
Pontiac
| Sunfire
| 1995-1997
| 4 Cyl 2.2L
View More
View related parts
GM Seal Asm,Exhaust Valve Stem Oil
Part Number:
88891760
$13.05
Ships in 1-2 Business Days
ADD TO CART
Make sure this part fits,
Select Vehicle
Product Specifications
Other Name:
SEAL, Engine Valve; Exhaust Valve Seal, Valve Seal
Replaces:
24501395
Fits the following GM Models:
Buick
| Century
| 1986-1993
| 6 Cyl 3.3L
Buick
| Electra
| 1986-1990
| 6 Cyl 3.8L
Buick
| Lesabre
| 1988-1995, 1986
| 6 Cyl 3.0L, 6 Cyl 3.8L
Buick
| Park Avenue
| 1991-1995
| 6 Cyl 3.8L
Buick
| Reatta
| 1991
| 6 Cyl 3.8L
Buick
| Regal
| 1990-1995
| 6 Cyl 3.8L
Buick
| Riviera
| 1995, 1991-1993, 1986
| 6 Cyl 3.8L
Buick
| Skylark
| 1989-1993
| 6 Cyl 3.3L
Chevrolet
| Lumina
| 1992-1995
| 6 Cyl 3.8L
Oldsmobile
| 88
| 1992-1995
| 6 Cyl 3.8L
View More
View related parts
GM Seal,Valve Stem Oil
Part Number:
88891778
$13.05
Ships in 1-3 Business Days
ADD TO CART
Make sure this part fits,
Select Vehicle
Product Specifications
Other Name:
SEAL, Engine Valve; Valve Seal
Replaces:
24572068
Fits the following GM Models:
Buick
| Skylark
| 1996-1998
| 4 Cyl 2.4L
Chevrolet
| Cavalier
| 1996-2002
| 4 Cyl 2.4L
Chevrolet
| Malibu
| 1997-1999
| 4 Cyl 2.4L
Oldsmobile
| Achieva
| 1996-1998
| 4 Cyl 2.4L
Oldsmobile
| Alero
| 1999-2001
| 4 Cyl 2.4L
Pontiac
| Grand Am
| 1996-2001
| 4 Cyl 2.4L
Pontiac
| Sunfire
| 1996-2002
| 4 Cyl 2.4L
View More
View related parts
GM Seal Unit, Valve Stem Oil (Free Of Asbestos)
Part Number:
10054539
$19.93
MSRP:
$40.20
You Save: $20.27 (51%)
Ships in 1-2 Business Days
ADD TO CART
Make sure this part fits,
Select Vehicle
Product Specifications
Other Name:
SEAL KIT, Engine Valve; Valve Seal
Fits the following GM Models:
Buick
| Regal
| 1993
| 6 Cyl 3.1L
Chevrolet
| Beretta
| 1992-1993
| 6 Cyl 3.1L
Chevrolet
| Cavalier
| 1992-1994
| 6 Cyl 3.1L
Chevrolet
| Corsica
| 1992-1993
| 6 Cyl 3.1L
Chevrolet
| Lumina
| 1993-1994
| 6 Cyl 3.1L
Oldsmobile
| Cutlass
| 1993
| 6 Cyl 3.1L
Pontiac
| Grand Prix
| 1993
| 6 Cyl 3.1L
Pontiac
| Sunbird
| 1992-1994
| 6 Cyl 3.1L
View More
View related parts
GM Seal,Valve Stem Oil
Part Number:
10114119
$13.05
MSRP:
$14.32
You Save: $1.27 (9%)
ADD TO CART
Make sure this part fits,
Select Vehicle
Product Specifications
Other Name:
SEAL, Engine Valve; Valve Seal
Fits the following GM Models:
Chevrolet
| Blazer
| 1990-1991
Chevrolet
| C1500
| 1991
| 8 Cyl 7.4L
Chevrolet
| C2500
| 1991-2000
| 8 Cyl 7.4L
Chevrolet
| C3500
| 1991-2000
| 8 Cyl 7.4L
Chevrolet
| Express
| 1996-2000
| 8 Cyl 7.4L
Chevrolet
| G10
| 1994-1995, 1990-1991
Chevrolet
| G20
| 1990-1991
Chevrolet
| G30
| 1990-1996
| 8 Cyl 7.4L
Chevrolet
| K1500
| 1991
Chevrolet
| K2500
| 1991-2000
| 8 Cyl 7.4L
View More
View related parts
GM Seal Assembly, Intake Valve Stem Oil *Inside Diameter, Orange
Part Number:
25535162
$13.05
ADD TO CART
Make sure this part fits,
Select Vehicle
Product Specifications
Other Name:
SEAL, Engine Valve; Intake Valve Seal, Valve Seal
Fits the following GM Models:
Buick
| Century
| 1992-1993, 1982-1988
| 6 Cyl 3.0L, 6 Cyl 3.3L, 6 Cyl 3.8L
Buick
| Electra
| 1985-1988
| 6 Cyl 3.0L, 6 Cyl 3.8L
Buick
| Lesabre
| 1992-1995, 1986
| 6 Cyl 3.0L, 6 Cyl 3.8L
Buick
| Park Avenue
| 1991-1995
| 6 Cyl 3.8L
Buick
| Reatta
| 1988-1991
| 6 Cyl 3.8L
Buick
| Regal
| 1990-1995, 1984-1987
| 6 Cyl 3.8L
Buick
| Riviera
| 1995, 1988-1993, 1984-1986
| 6 Cyl 3.8L
Buick
| Skylark
| 1992-1993, 1986-1988
| 6 Cyl 3.0L, 6 Cyl 3.3L
Buick
| Somerset
| 1985-1987
| 6 Cyl 3.0L
Chevrolet
| Lumina
| 1992-1995
| 6 Cyl 3.8L
View More
View related parts
GM Seal Unit, Inlet Valve Stem Oil /Std/ (Free Of Asbestos)
Part Number:
470110
$13.05
Ships in 1-2 Business Days
ADD TO CART
Make sure this part fits,
Select Vehicle
Product Specifications
Other Name:
SEAL KIT, Engine Valve; Intake Valve Seal, Valve Seal
Fits the following GM Models:
Buick
| Century
| 1993
| 4 Cyl 2.2L
Buick
| Skyhawk
| 1983-1986
| 4 Cyl 2.0L
Cadillac
| Cimarron
| 1983-1986
| 4 Cyl 2.0L
Chevrolet
| Cadet
| 1983-1986
| 4 Cyl 2.0L
Chevrolet
| Cavalier
| 1983-1986
| 4 Cyl 2.0L
Chevrolet
| Chevette
| 1982-1987
| 4 Cyl 1.6L
Oldsmobile
| Cutlass
| 1993
| 4 Cyl 2.2L
Oldsmobile
| Firenza
| 1983-1986
| 4 Cyl 2.0L
Pontiac
| J2000
| 1983-1986
| 4 Cyl 2.0L
Pontiac
| Sunbird
| 1986
| 4 Cyl 2.0L
View More
View related parts
GM Seal,Valve Stem Oil .25Mm Oversize Inside Diameter
Part Number:
12360885
$13.05
Ships in 1-2 Business Days
ADD TO CART
Make sure this part fits,
Select Vehicle
Product Specifications
Other Name:
SEAL, Engine Valve
Fits the following GM Models:
Buick
| Skylark
| 1992-1995
| 4 Cyl 2.3L
Chevrolet
| Beretta
| 1992-1994
| 4 Cyl 2.3L
Chevrolet
| Cavalier
| 1995
| 4 Cyl 2.3L
Chevrolet
| Corsica
| 1992-1994
Oldsmobile
| Achieva
| 1992-1995
| 4 Cyl 2.3L
Oldsmobile
| Silhouette
| 1993-1994
Pontiac
| Grand Am
| 1992-1995
| 4 Cyl 2.3L
Pontiac
| Sunfire
| 1995
| 4 Cyl 2.3L
View More
View related parts
GM Seal Assembly, Exhaust Valve Stem Oil
Part Number:
364799
$13.05
Ships in 1-2 Business Days
ADD TO CART
Make sure this part fits,
Select Vehicle
Product Specifications
Other Name:
SEAL, Engine Valve; Exhaust Valve Seal, Valve Seal
Fits the following GM Models:
Buick
| Century
| 1993-1994
| 4 Cyl 2.2L
Chevrolet
| Beretta
| 1990-1993
| 4 Cyl 2.2L
Chevrolet
| Cavalier
| 1990-1993
| 4 Cyl 2.2L
Chevrolet
| Chevette
| 1982-1987
| 4 Cyl 1.6L
Chevrolet
| Corsica
| 1990-1993
| 4 Cyl 2.2L
Oldsmobile
| Cutlass
| 1993-1994
| 4 Cyl 2.2L
Pontiac
| T1000
| 1982-1987
| 4 Cyl 1.6L
View More
View related parts
GM Seal,Valve Stem Oil
Part Number:
10214034
$1.65
MSRP:
$2.60
You Save: $0.95 (37%)
Ships in 1-3 Business Days
ADD TO CART
Make sure this part fits,
Select Vehicle
Product Specifications
Other Name:
SEAL, Engine Valve; Seal Ring, Valve Seal, Valve Seal O-Ring
Fits the following GM Models:
Buick
| Century
| 1982-1986
| 4 Cyl 2.5L, 6 Cyl 2.8L
Buick
| Roadmaster
| 1991-1993
| 8 Cyl 5.0L, 8 Cyl 5.7L
Buick
| Skylark
| 1982-1986
| 4 Cyl 2.5L, 6 Cyl 2.8L
Buick
| Somerset
| 1985-1986
| 4 Cyl 2.5L
Cadillac
| Brougham
| 1990-1992
| 8 Cyl 5.0L, 8 Cyl 5.7L
Cadillac
| Cimarron
| 1985-1986
| 6 Cyl 2.8L
Cadillac
| Fleetwood
| 1993
| 8 Cyl 5.7L
Chevrolet
| Astro
| 1985-1995
| 4 Cyl 2.5L, 6 Cyl 4.3L
Chevrolet
| Blazer
| 1985-1995
| 6 Cyl 4.3L, 8 Cyl 5.0L, 8 Cyl 5.7L, 8 Cyl 6.2L Diesel, 8 Cyl 6.5L Diesel
Chevrolet
| C10
| 1985-1986
| 6 Cyl 4.3L, 8 Cyl 5.0L, 8 Cyl 5.7L, 8 Cyl 6.2L Diesel
View More
View related parts
GM Seal, Valve Stem Oil
Part Number:
12555601
$7.47
MSRP:
$11.76
You Save: $4.29 (37%)
Ships in 1-3 Business Days
ADD TO CART
Make sure this part fits,
Select Vehicle
Product Specifications
Other Name:
SEAL, Engine Valve; Valve Seal
Fits the following GM Models:
Cadillac
| Escalade
| 2002-2005
Chevrolet
| Avalanche
| 2002-2006
| 8 Cyl 8.1L
Chevrolet
| C3500
| 2001-2002
Chevrolet
| Express
| 2001-2002
| 8 Cyl 8.1L
Chevrolet
| Silverado
| 2001-2007
| 8 Cyl 8.1L
Chevrolet
| Suburban
| 2001-2006
| 8 Cyl 8.1L
GMC
| Savana
| 2001-2002
| 8 Cyl 8.1L
GMC
| Sierra
| 2001-2007
| 8 Cyl 8.1L
GMC
| Yukon
| 2001-2006
| 8 Cyl 8.1L
View More
View related parts
GM Seal, Exhaust Valve Stem Oil
Part Number:
23502552
Make sure this part fits,
Select Vehicle
Product Specifications
Other Name:
SEAL, Engine Valve; Valve Seal
Fits the following GM Models:
Chevrolet
| Blazer
| 1985-1994
| 8 Cyl 6.2L Diesel, 8 Cyl 6.5L Diesel
Chevrolet
| C10
| 1985-1986
| 8 Cyl 6.2L Diesel
Chevrolet
| C1500
| 1988-1999
| 8 Cyl 6.2L Diesel, 8 Cyl 6.5L Diesel
Chevrolet
| C20
| 1985-1986
| 8 Cyl 6.2L Diesel
Chevrolet
| C2500
| 1988-2000
| 8 Cyl 6.2L Diesel, 8 Cyl 6.5L Diesel
Chevrolet
| C30
| 1985-1986
| 8 Cyl 6.2L Diesel
Chevrolet
| C3500
| 1988-2002
| 8 Cyl 6.2L Diesel, 8 Cyl 6.5L Diesel
Chevrolet
| Express
| 1996-2002
| 8 Cyl 6.5L Diesel
Chevrolet
| G10
| 1994-1995, 1985-1991
Chevrolet
| G20
| 1985-1995
| 8 Cyl 6.2L Diesel, 8 Cyl 6.5L Diesel
View More
| Page 1 of 6 |
Next >
1-20 of 106 Results
Related GM Parts
GM Exhaust Hanger
GM Crankshaft Seal
GM Engine Mount Bracket
GM Oil Filler Cap
GM PCV Valve
GM PCV Valve Hose
GM Piston
GM Variable Timing Sprocket
Browse by Make
+
Buick Valve Stem Oil Seal
Cadillac Valve Stem Oil Seal
Chevrolet Valve Stem Oil Seal
GMC Valve Stem Oil Seal
Hummer Valve Stem Oil Seal
Oldsmobile Valve Stem Oil Seal
Pontiac Valve Stem Oil Seal
Saturn Valve Stem Oil Seal