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The oil sump return seal is a small but critical component within the engine lubrication system, designed to provide a secure seal at the oil return connection between engine components and the sump (oil pan). This seal ensures that engine oil returning to the sump remains contained within the system, preventing leaks and maintaining proper oil circulation.
Sold Each.
x2 Required Per Car.
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Diagram Ref No 6
What This Product Does:
- Seals oil return passages leading back to the sump
- Prevents engine oil leaks at connection points
- Maintains proper oil pressure and circulation
- Ensures efficient return flow of oil within the engine
Symptoms Of Wear Or Failure:
- Oil leaks from the lower engine or sump area
- Oil residue around return pipe or connection points
- Gradual drop in engine oil level
- Burning oil smell from oil contacting hot components
- Visible cracking or hardening of the seal material
Why Replacement Matters:
- Prevents oil leaks and engine contamination
- Maintains correct oil pressure and circulation
- Protects engine components from inadequate lubrication
- Reduces risk of oil-related engine damage
- Ensures a clean and efficient engine bay
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0PB115111C
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- Porsche Boxster 986 2.5L 1997-99
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- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
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- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
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- Porsche 997 MK1 GT3 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
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Please note: Sealing O-ring must be ordered separately – Part Number 90012310630/2
Fits:
Porsche 986 Boxster 1997 - 2004
Porsche 987.1 Boxster 2005 - 2008
Porsche 987.2 Boxster 2009 - 2012
Porsche 987C.1 Cayman 2005 - 2008
Porsche 987C.2 Cayman 2009 - 2012
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Porsche 981 Cayman 2014 - 2016
Porsche 996 1998 - 2005
Porsche 997.1 2005 - 2008
Porsche 997.2 2009 - 2012
Porsche 991.1 2012 - 2016
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90021900930
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This small but critical component creates a secure, leak-proof seal between the oil drain plug and the engine’s oil pan to prevent engine oil seepage. It is sized and manufactured to match the original Porsche specification for a reliable fit and sealing performance.
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Fits:
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Diagram ref no 24
This premium OE Match seal ring (also referred to as a crush washer or gasket) is engineered to the correct inner/outer diameters and material thickness used by Porsche on multiple model platforms.
The seal ring is ideal for use during every oil change where the drain plug has been removed and reinstalled, and whenever the original ring shows signs of compression set, distortion, corrosion, or damage. This OE Match version delivers a direct fit and consistent sealing performance comparable to the factory-specified part.
The oil drain plug seal ring sits between the oil drain plug head and the engine oil pan surface. When the drain plug is torqued to specification, the seal ring compresses slightly to form a fluid-tight barrier, preventing engine oil from escaping the sump under pressure or vibration. A proper seal helps maintain correct oil levels and prevents messy leaks on the road or in the garage.
Function: Installed each time the engine oil drain plug is removed, the seal ring is “crushed” into place during installation, creating an even seal around the drain hole. Its function is critical because even small oil leaks can lead to reduced oil levels, potential engine damage, and contamination of suspension or exhaust components. The OE Match ring reproduces the original’s sealing surface characteristics so that torque and compression behavior remain within factory-designed tolerances.
Oil drain plug seal rings are single-use sealing components that deform each time the plug is installed. Reusing an old or compressed ring can lead to oil drips or leaks, especially under heat cycling and vibration. A proper OE Match seal ring ensures a dependable oil-tight seal, helping to preserve engine lubrication integrity, avoid oil loss, and protect against environmental contamination.
When to replace:
• Every time the **oil drain plug is removed”
• If existing seal ring shows cracks, flattening, or corrosion
• When performing routine oil and filter service
• After discovering minor oil seepage at the drain plug
• During engine maintenance or oil pan removal
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90012310630
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Fits:
Porsche 987.2 Boxster
Porsche 987C.2 Cayman
Porsche 981 Boxster
Porsche 981C Cayman
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Porsche 991 Carrera / Turbo / GT3
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Click 'Zoom in' for large parts diagram.
Diagram ref no 15
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