Mahle SS45919 Engine Valve Stem Oil Seal Set - Exhaust

Mahle SS45919 Valve Stem Oil Seal Set

Mahle SS45919 is an engine valve stem oil seal set built for exhaust valve service on select GM applications. It uses a metal with molded rubber construction to help maintain a consistent seal at the valve stem and guide interface, supporting proper oil control in the cylinder head.

Compatible With 1997-2001 Chevrolet Corvette, exhaust; 1998-2001 Chevrolet Camaro, exhaust; 1999-2001 Chevrolet Silverado 1500, exhaust; and additional Chevrolet, GMC, and Pontiac V8 applications listed below. This part cross-references Fel-Pro SS 70945 and General Motors 12457652 for the same application.

Key Features

• Mahle engine valve stem oil seal set for exhaust valve service
• Metal with molded rubber seal material for durable sealing performance
• Upper inside diameter: 7.1 mm
• Inside diameter: 0.28 in
• Outside diameter: 0.491 in
• Designed for OE-style fitment on listed Chevrolet Camaro, Corvette, Silverado, Suburban, Tahoe, GMC Sierra, Yukon, and Pontiac Firebird applications
• Part number SS45919 for catalog and fitment lookup

Detailed Description

Mahle SS45919 is a valve stem oil seal set for exhaust-side service on select 1997-2001 GM engines. The seal uses a metal body with molded rubber to provide a controlled seal around the valve stem, with dimensions that include a 0.28-inch inside diameter, 0.491-inch outside diameter, and 7.1 mm upper inside diameter at the valve side. Mahle gaskets and sealing components are trusted by OEMs and technicians for engine sealing applications, and this SS45919 listing is matched to the vehicle fitment shown here.

Vehicle coverage includes 1997-2000 Chevrolet Corvette, 1998-2000 Chevrolet Camaro, 1999-2000 Chevrolet Silverado 1500, 1999-2000 Chevrolet Silverado 2500, 2000 Chevrolet Suburban 1500, 2000 Chevrolet Suburban 2500, 2000 Chevrolet Tahoe, 1999-2000 GMC Sierra 1500, 1999-2000 GMC Sierra 2500, 2000 GMC Yukon, 2000 GMC Yukon XL 1500, 2000 GMC Yukon XL 2500, and 1998-2000 Pontiac Firebird. Additional 2001 exhaust applications include Chevrolet Camaro, Corvette, Silverado 1500, Silverado 1500 HD, Silverado 2500, Silverado 2500 HD, Silverado 3500, Suburban 1500, Suburban 2500, Tahoe, GMC Sierra 1500, Sierra 1500 HD, Sierra 2500, Sierra 2500 HD, Sierra 3500, Yukon, Yukon XL 1500, Yukon XL 2500, and Pontiac Firebird.

What It Helps Address

• Oil leakage past worn valve stem seals
• Blue exhaust smoke caused by oil entering the combustion chamber
• Oil consumption related to aged cylinder head sealing components
• Valve guide area sealing wear during engine rebuild or head service
• Loss of consistent exhaust valve stem oil control

Installation Notes and Tips

Verify engine code, cylinder head design, and valve guide outside diameter before ordering. This listing notes 1st design applications with a 14.4 mm valve guide O.D. on certain 2001 vehicles, so matching the original head configuration is important. Confirm exhaust-side placement and compare the seal dimensions to the removed part before installation. Clean the valve guide area thoroughly and inspect the stem and guide for wear that could affect sealing performance.

Quality Assurance

Mahle manufactures sealing products used in OEM and technician service environments, with a focus on dimensional accuracy and engine sealing consistency. SS45919 is cataloged as an OE-style replacement for the listed GM applications and is supported by Mahle’s established gasket and sealing product expertise.