Elring 781.790 Engine Valve Stem Seal Set

The Elring 781.790 is a complete engine valve stem seal set engineered to OEM specifications. Cross-referencing Mercedes-Benz OEM part numbers 2540534800, A2540534800, A2640531100, and 2640531100, this kit provides a factory-correct replacement for worn or leaking valve stem oil seals.

Valve stem seals play a critical role in engine health by preventing engine oil from migrating down the valve stem and into the combustion chamber. Worn seals commonly cause excessive oil consumption, blue exhaust smoke, and engine misfires. Replacing them with a high-quality set restores proper oil control and engine efficiency.

Key Features:

• OEM-quality seal set meeting or exceeding original factory specifications
• Manufactured by ElringKlinger, a globally recognized OEM supplier to major automotive manufacturers
• Constructed from heat-resistant, durable elastomer materials engineered to withstand high engine temperatures and pressures
• Provides precise fit to valve guides, minimizing the gap between seal and guide for effective oil control
• Helps reduce oil consumption and prevents oil from entering the combustion chamber
• Cross-references OEM part numbers: 2540534800, A2540534800, A2640531100, 2640531100

ElringKlinger has been a trusted OEM sealing partner to the automotive industry for over 120 years, supplying cylinder head gaskets, oil seals, and valve stem seals to engine manufacturers worldwide. The Elring 781.790 delivers that same OEM-grade reliability in an aftermarket-ready package.