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Porsche
The Porsche Genuine OE O-Ring (Part No. 99970754740) is a precision-engineered sealing ring (28 x 3 mm) designed for use within the engine oil cooling system. It is specifically used at the oil cooler and associated pipe connections, ensuring a secure and leak-free seal.
Sold individually, 2 required per vehicle
Fits:
Porsche 987.1 Boxster 2.7L / 3.2L / 3.4L 2005 - 2008
Porsche 987C.1 Cayman 2.7L / 3.4L 2006 - 2008
Porsche 997.1 Carrera 3.6L / 3.8L 2005 - 2008
Diagram ref no
This O-ring seals the connection between the engine oil cooler (heat exchanger) and oil passages or pipework, preventing oil leaks and maintaining proper system pressure.
By ensuring a tight seal, it allows engine oil to circulate efficiently through the cooler, helping regulate oil temperature and protect critical engine components.
Functions & Technical Role
• Oil sealing: Prevents leaks at oil cooler connections
• Pressure retention: Maintains correct oil system pressure
• Thermal resistance: Designed for high-temperature engine environments
• System protection: Prevents air ingress and oil contamination
• OEM precision: Exact 28 x 3 mm dimensions for correct fitment
Fitment / Position on car
• Fitting position: Engine lubrication system
• Location: Between engine oil cooler and mounting surface / oil pipe connections
• System: Engine oil cooling / lubrication system
O-rings in the oil system are exposed to heat, pressure, and constant oil flow, which can cause them to harden or degrade over time. A failing seal can result in:
• Engine oil leaks
• Loss of oil pressure
• Oil contamination
• Risk of engine damage
Replacing with a genuine Porsche OE O-ring ensures proper sealing and protects the engine from costly issues.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970754740
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- We are unable to provide fitting details for this product at this time. Please contact us for further information.
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