O-Ring for Oil Cooler (28 X 3 mm). Porsche 987.1 Boxster / 987C.1 Cayman / 997.1 Carrera  ❭  99970754740

O-Ring for Oil Cooler (28 X 3 mm)
The OE Match Oil Cooler O-Ring (28 x 3 mm) is a precision-engineered sealing component developed to meet original Porsche specifications for fit, durability, and performance. This O-ring is used within the engine oil cooling system, where it seals connections between the oil cooler and coolant or oil passages.
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 19

This O-ring is commonly required when servicing or replacing the oil cooler, oil pipes, or related engine components and should always be renewed during reassembly to prevent leaks and ensure long-term reliability.

Function
•  Provides a tight seal for oil cooler connections
•  Prevents engine oil leaks and pressure loss
•  Maintains proper lubrication and cooling efficiency
•  Resists heat, pressure, and oil exposure
•  Ensures long-term sealing reliability

Fitment & Application
•  System: Engine oil cooler / lubrication system
•  Position: Oil cooler to housing / pipe connections
•  Size: 28 mm inner diameter x 3 mm thickness
•  Function: Prevents oil leaks and maintains system pressure
•  Sold: Individually

O-rings in the oil system are exposed to high temperatures and continuous contact with engine oil, causing them to harden, flatten, or degrade over time. A failing seal can lead to oil leaks, reduced pressure, and potential engine damage. Replacing this O-ring during servicing ensures a proper seal, maintains oil system integrity, and protects engine components.

When to replace
•  During oil cooler or pipe servicing
•  Visible oil leaks around cooler connections
•  O-ring appears flattened, brittle, or cracked
•  Preventative replacement during engine maintenance
•  When removing or reinstalling oil system components

Related reference numbers
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99970754740

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