Mahle SS45963 Engine Valve Stem Oil Seal Set - Exhaust

Mahle SS45963 Valve Stem Oil Seal Kit

Mahle SS45963 is a valve stem oil seal kit built for exhaust-side service on select Dodge Ram and Ram heavy-duty diesel applications. It uses Viton seal material and OE-style dimensions to support a precise seal at the valve stem, helping maintain proper oil control in the cylinder head.

Mahle’s valve stem oil seal kit line is backed by the brand’s gasket and sealing expertise, with products trusted by OEMs and technicians for engine sealing applications. This part number, SS45963, is a direct-fit style solution for specific Cummins-powered Ram and Dodge Ram models.

Key Features

• Viton valve stem seal material for heat-resistant sealing performance
• Inside diameter: 0.25 in. / 6.3 mm
• Outside diameter: 1.12 in.
• Thickness: 0.024 in.
• Stem overall height: 0.62 mm
• Exhaust valve stem oil seal application
• OE-style sealing dimensions for engine service work

Fitment and Application

• Fits 2011-2012 Ram 2500, Exhaust; Metal with Molded Rubber; Valve Stem Oil Seal Kit
• Fits 2011-2012 Ram 3500, Exhaust; Metal with Molded Rubber; Valve Stem Oil Seal Kit
• Fits 2009-2010 Dodge Ram 2500, Exhaust; Metal with Molded Rubber; Valve Stem Oil Seal Kit
• Fits 2008-2010 Dodge Ram 3500, Exhaust; Metal with Molded Rubber; Valve Stem Oil Seal Kit
• Fits 2003-2008 Dodge Ram 2500, Exhaust; Top Hat Seal; Contains 12, Priced as a Set; Metal with Molded Rubber
• Fits 2003-2007 Dodge Ram 3500, Exhaust; Top Hat Seal; Contains 12, Priced as a Set; Metal with Molded Rubber
• Fits 1998-2002 Dodge Ram 2500, Exhaust; Top Hat Seal; Contains 12, Priced as a Set; Metal with Molded Rubber; After Engine Serial # 46239409
• Fits 1998-2002 Dodge Ram 3500, Exhaust; Top Hat Seal; Contains 12, Priced as a Set; Metal with Molded Rubber; After Engine Serial # 46239409

This part cross-references Cummins 3955394 and FEL-PRO SS 71186 for the same application.

What It Helps Address

• Oil leakage past the valve stem seal
• Exhaust-side valve stem sealing wear
• Oil consumption caused by worn stem seals
• Smoke from oil entering the combustion chamber
• Loss of sealing integrity during cylinder head service

Installation Notes and Tips

Verify engine serial number and valve seal style before ordering, especially on 1998-2002 Dodge Ram 2500 and Ram 3500 applications that require fitment after engine serial number 46239409. Confirm the exhaust-side position and compare the original seal dimensions to the Mahle SS45963 specifications before installation.

Quality Assurance

Mahle gaskets and sealing components are used in OEM and technician service environments worldwide. The SS45963 valve stem oil seal kit is manufactured to support consistent sealing performance in engine repair and rebuild work.