Elring 843.010 Engine Cylinder Liner O-Ring

Elring Cylinder Liner O-Ring for Porsche 911

The Elring 843.010 engine cylinder liner O-ring is a precision sealing component for Porsche 911 applications. Built from FPM (fluoride rubber), it is specified for dimensional accuracy and resistance to engine sealing conditions where consistent fit is critical.

Key Features

• Brand: Elring
• Part number: 843.010
• Engine cylinder liner O-ring for sealing system service
• Material: FPM (fluoride rubber)
• Shape: O-ring
• Inside diameter: 104.0 mm
• Outside diameter: 108.0 mm
• Thickness: 2.0 mm
• Cross-reference: 999 707 393 40

Detailed Description

Elring 843.010 is an engine cylinder liner O-ring used in sealing system service on Porsche 911 models. The FPM construction is selected for demanding engine environments where heat and fluid exposure can affect sealing performance. With a 104.0 mm inside diameter, 108.0 mm outside diameter, and 2.0 mm thickness, this O-ring is built to match the listed application dimensions for proper sealing at the cylinder liner interface.

Compatible With Porsche 911 applications including Fits 1997-1998 Porsche 911, N/A; Fits 2001-2005 Porsche 911, N/A; Fits 2006 Porsche 911, N/A; Fits 2007-2011 Porsche 911, N/A; and Fits 2012 Porsche 911, N/A. The part number 843.010 is also a useful reference when verifying the correct sealing component during engine service on Porsche 911 models.

What This Part Helps Address

• Oil or coolant seepage at the cylinder liner sealing area
• Loss of sealing integrity from aged or flattened O-rings
• Improper sealing after engine teardown or rebuild work
• Fitment issues when replacing a worn cylinder liner seal
• Service needs on Porsche 911 engine sealing systems

Installation Notes and Tips

Confirm the listed dimensions before installation: 104.0 mm inside diameter, 108.0 mm outside diameter, and 2.0 mm thickness. Clean the sealing surfaces thoroughly and inspect the cylinder liner and groove area for wear, scoring, or debris before fitting the new O-ring. Verify the application against the vehicle year and engine configuration shown for Porsche 911 models before assembly.

Quality Assurance

Elring is a recognized name in engine sealing components, and this O-ring is produced to meet the dimensional and material requirements listed for the application. Use the part number 843.010 and the cross-reference 999 707 393 40 to confirm the correct sealing part for your Porsche 911 service work.