Elring 099.643 Engine Cylinder Liner O-Ring

Elring 099.643 Cylinder Liner O-Ring

Elring 099.643 is a copper engine cylinder liner O-ring built to match the specified sealing dimensions for select Porsche flat-six applications. With a 97.2 mm inside diameter, 108.0 mm outside diameter, and 0.5 mm thickness, it supports precise sealing at the cylinder liner interface.

Fits 1974 Porsche 911 and Fits 1975-1977 Porsche 911, N/A. This part cross-references Porsche 911.104.192.06 for the same application.

Key Features

• Brand: Elring
• Part number: 099.643
• Material: copper
• Inside diameter: 97.2 mm
• Outside diameter: 108.0 mm
• Thickness: 0.5 mm
• Engine sealing component for cylinder liner applications

Product Details

This Elring cylinder liner O-ring is specified for Porsche 911 engine sealing applications where accurate dimensions and stable copper construction are required. The listed measurements help ensure proper seating at the cylinder liner interface, supporting a reliable seal in the engine’s gasket and sealing system. For Porsche 911 cylinder liner O-ring replacement, Elring 099.643 provides the exact dimensional profile needed for the confirmed fitment years.

Common Issues It Can Address

• Oil seepage at the cylinder liner sealing area
• Loss of sealing integrity during engine service
• Incorrect O-ring sizing during rebuild or repair
• Leak paths caused by worn or damaged sealing rings

Installation Notes and Tips

Verify the cylinder liner groove and mating surfaces are clean before installation. Confirm the inside diameter, outside diameter, and thickness against the engine specification before assembly. Use proper engine-building procedures for Porsche 911 sealing components, and inspect adjacent gaskets and sealing surfaces during service.

Quality Assurance

Elring is an established name in engine gaskets and sealing systems, and this part is manufactured to the stated dimensional specifications for the listed Porsche 911 applications.