Mahle SS45812 Engine Valve Stem Oil Seal Set - Exhaust

Mahle Valve Stem Oil Seal Set SS45812

Mahle SS45812 is an engine valve stem oil seal set built for exhaust-side sealing on a wide range of GM trucks, vans, SUVs, and commercial applications. It uses a metal and molded rubber construction to maintain a precise seal at the valve stem and help control oil entry into the combustion chamber.

Key Features

• Metal with molded rubber valve stem seal material for stable sealing performance
• Upper inside diameter: 9.4 mm
• Inside diameter: 0.37 in
• Outside diameter: 0.728 in
• Overall height: 10.5 mm
• Thickness: 0.413 in
• Exhaust position application
• Engine valve stem oil seal set for OE-style service replacement

Detailed Description

Mahle SS45812 is engineered for exhaust valve stem sealing where accurate fit and consistent oil control matter. The metal-reinforced body and molded rubber sealing surface are specified to match the valve stem dimensions listed above, supporting a secure seal at the guide area. Mahle gaskets and sealing components are trusted by OEMs and technicians worldwide, and this part follows that same service-focused approach. This part cross-references Fel-Pro SS 72711 and General Motors 23502552 for the same application. Compatible vehicle coverage includes Chevrolet C1500, K1500, Tahoe, Express 2500, Express 3500, GMC C1500, K1500, Yukon, Savana 2500, Savana 3500, and Hummer H1 exhaust applications. Mahle SS45812 is also a direct search match for buyers looking for SS45812 valve stem seals for GM exhaust-side engine service.

What It Helps Address

• Oil leakage past worn exhaust valve stem seals
• Blue exhaust smoke caused by oil entering the combustion chamber
• Oil consumption linked to hardened or damaged stem seals
• Loss of sealing integrity during cylinder head service
• Valve guide area contamination from deteriorated seals

Installation Notes and Tips

Verify valve stem diameter, seal height, and outside diameter before installation. Clean the valve guide area thoroughly and inspect the stem and guide for wear, scoring, or carbon buildup before fitting the new seal. Because this is an exhaust-position seal, confirm the application against the engine build and cylinder head specification for your Chevrolet, GMC, or Hummer platform. Use proper valve spring service procedures and follow the vehicle manufacturer’s repair sequence.

Quality Assurance

Mahle manufactures sealing products for OEM and professional service use, with a focus on dimensional accuracy and dependable engine sealing. SS45812 is built to the listed specifications for consistent fitment in supported applications.