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- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
Oil Filler Cap Seal – FKM Rubber
High-quality replacement oil filler cap seal designed for Porsche 928 and 928S models.
This gasket fits within the oil filler cap, providing a
secure seal to prevent oil leaks and maintain proper engine sealing. It is a
critical component for ensuring clean and efficient engine operation.
Fits:
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
Diagram ref no 31
Unlike the original cork version, this upgraded seal is manufactured from modern fluorocarbon rubber (FKM), offering significantly improved resistance to heat, oil, and ageing for long-term durability.
Key Features
• Direct replacement oil filler cap seal
• Suitable for Porsche 928 and 928S models
• Upgraded FKM (fluorocarbon rubber) material
• Superior resistance to heat, oil, and wear
• OEM-style fit and sealing performance
• Ideal for maintenance and oil leak prevention
Function and Purpose
This seal ensures a tight closure of the oil filler cap.
It helps to:
• Prevent engine oil leaks from the filler neck
• Maintain proper engine sealing
• Protect against dirt and contamination
• Support overall engine cleanliness and performance
Why Upgrade from Cork to FKM
Original cork seals are prone to deterioration over time.
Benefits of FKM material include:
• Increased resistance to oil and high temperatures
• Longer service life
• Reduced risk of cracking or shrinkage
• Improved sealing reliability
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92810771100
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- 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
Fits:
Porsche 986 Boxster 1997-04
Porsche 996 C2 / C4 / C4S 1998-04
Porsche 996 Turbo / GT2
Porsche 996 GT3 2000-05
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610703550
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
Engine Oil Filler Neck Tube
This engine oil filler neck tube is designed for the Porsche
986 Boxster and provides a direct replacement for worn or damaged oil fill
pipes. It connects the oil filler cap to the engine, allowing clean and
controlled filling of engine oil while maintaining a sealed system.
Fits:
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
Diagram Ref No 19
In the Porsche 986, the oil filler tube runs through the bodywork from the rear luggage compartment to the engine. Due to its length and exposure to heat and vibration, it is a known wear component that can degrade over time.
What This Oil Filler Neck Tube Does
The oil filler neck tube forms the pathway for adding engine oil safely into the engine.
It helps:
• Provide a sealed route from filler cap to engine
• Prevent oil leaks and vapour escape
• Ensure clean and accurate oil filling
• Maintain proper crankcase ventilation
• Support overall engine oil system integrity
A properly functioning filler tube is essential for both maintenance and engine reliability.
Why Oil Filler Neck Tubes Fail
Over time, the original oil filler tube can deteriorate due to heat, age and engine movement.
Common causes include:
Cracking and splitting
Plastic and rubber sections can become brittle and crack.
Oil contamination
Constant exposure to oil vapours can degrade materials.
Heat exposure
Engine bay temperatures accelerate wear and hardening.
Movement and vibration
Engine movement can stress the tube and connections.
Symptoms of a Failing Oil Filler Tube
• Oil smell from the engine bay or cabin
• Visible oil leaks around the filler tube
• Difficulty adding oil
• Engine warning lights related to vacuum leaks
• Rough running due to air leaks in the system
A damaged filler tube can lead to both oil leaks and unmetered air entering the engine.
Why You May Need to Replace This Tube
Fix Oil Leaks
Replacing a cracked tube prevents oil seepage and contamination.
Restore Proper Sealing
Ensures the oil system remains sealed and functions correctly.
Improve Engine Performance
Eliminates vacuum leaks that can affect engine running.
Essential Maintenance for Ageing Vehicles
A common failure point on Porsche 986 models.
Direct Fit Replacement
Designed to match original Porsche specifications for easy installation.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610725403
The product you are viewing cross references to these numbers