Mahle SS45930B Engine Valve Stem Oil Seal Set - Intake and Exhaust

Mahle Valve Stem Oil Seal Set SS45930B

Mahle SS45930B is an engine valve stem oil seal set built for intake and exhaust valve sealing in select GM and Hummer applications. It uses a metal body with molded rubber to help maintain a consistent seal at the valve stem and guide interface.

Key Features

• Engine valve stem oil seal set for intake and exhaust positions
• Metal with molded rubber construction for sealing performance
• Upper inside diameter: 4.85 mm
• Inside diameter: 0.19 in
• Outside diameter: 0.387 in
• Thickness and height: 0.029 in
• Mahle sealing product engineered for OE-style engine service

Detailed Description

Mahle SS45930B is a valve stem oil seal set used to control oil flow at the valve stem in the cylinder head. Accurate sealing at this point helps support proper combustion chamber cleanliness and stable engine operation. This part cross-references General Motors 12596994 and FEL-PRO SS 71043-2 for the same application. Compatible vehicle coverage includes 2004-2006 Chevrolet Colorado, 2004-2006 GMC Canyon, 2006 Hummer H3, and 2006 Isuzu i-350. If you are sourcing a Mahle SS45930B replacement for a Chevrolet Colorado or GMC Canyon valve stem seal service, verify engine application and valve train configuration before installation.

Common Issues This Part Addresses

• Oil leakage past worn valve stem seals
• Blue exhaust smoke caused by oil entering the combustion chamber
• Oil consumption related to valve guide sealing wear
• Carbon buildup on valves from oil intrusion
• Rough idle or fouled spark plugs linked to oil control problems

Installation Notes and Tips

Confirm the valve stem diameter and seal dimensions before installation. Clean the valve guide area thoroughly and inspect the valve stem and guide for wear, scoring, or excessive clearance. Proper seating is important for sealing performance, so follow the service procedure for the specific engine in your Chevrolet Colorado, GMC Canyon, Hummer H3, or Isuzu i-350. Use the correct tools and avoid damaging the molded rubber sealing surface during installation.

Quality Assurance

Mahle gaskets and sealing components are widely used by OEMs and technicians for engine sealing service. SS45930B is manufactured to support consistent sealing performance in the specified applications.