Gaskets & Sets

Chain adjuster sealing ring. 27 x 32
3 per engine. Price is for each.



Fits:
Porsche 996
Porsche 986 Boxster
Porsche 987 Boxster
Porsche 987C Cayman
Porsche 997.1 Gen

Click 'Zoom in' for large parts diagram.
Diagram ref no 37

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90012314730

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Chain adjuster sealing ring. 27 x 32
3 per engine. Price is for each.

Fits:
Porsche 996
Porsche 986 Boxster
Porsche 987 Boxster
Porsche 987C Cayman
Porsche 997.1 Gen

Click 'Zoom in' for large parts diagram.
Diagram ref no 37

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90012314730

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Crank case gasket set. with crankshaft seal.



Fits:
Porsche 987 Boxster 2.7L 11.2004-12.2009
Porsche 987 Boxster S 3.2L 11.2004-12.2006
Porsche 987 Boxster S 3.4L 07.2006-12.2009
Porsche 987 Boxster S 3.4L
Porsche 987 Boxster Spyder 3.4L RS 09.2007-12.2008

Porsche 987C Cayman 2.7L 07.2006-12.2009
Porsche 987C Cayman S 3.4L 11.2005-12.2009
Porsche 987C Cayman S 3.4L Sport 08.2008-12.2012

Related reference numbers
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284.410

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Crankcase oil separator gasket, 1-3 cyl.



Fits:
Porsche 986 Boxster 1997-04
Porsche 987.1 Boxster 2005-08
Porsche 987C.1 Cayman 2005-08
Porsche 996 Carrera 3.4L / 3.6L 1998-05
Porsche 997.1 Carrera 3.6L / 3.8L 2005-08

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Diagram ref no 20

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99610124151

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Crankcase oil separator gasket, 1-3 cyl.



Fits:
Porsche 986 Boxster 1997-04
Porsche 987.1 Boxster 2005-08
Porsche 987C.1 Cayman 2005-08
Porsche 996 Carrera 3.4L / 3.6L 1998-05
Porsche 997.1 Carrera 3.6L / 3.8L 2005-08

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Diagram ref no 20

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99610124151

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Crankcase oil separator gasket, 4-6 cyl.


Fits:
Porsche 986 Boxster 1997-04
Porsche 987.1 Boxster 2005-08
Porsche 987C.1 Cayman 2005-08
Porsche 996 Carrera 3.4L / 3.6L 1998-05
Porsche 997.1 Carrera 3.6L / 3.8L 2005-08

Click 'Zoom in' for large parts diagram.
Diagram ref no 22

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99610124251

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Crankcase oil separator gasket, 4-6 cyl.



Fits:
Porsche 986 Boxster 1997-04
Porsche 987.1 Boxster 2005-08
Porsche 987C.1 Cayman 2005-08
Porsche 996 Carrera 3.4L / 3.6L 1998-05
Porsche 997.1 Carrera 3.6L / 3.8L 2005-08

Click 'Zoom in' for large parts diagram.
Diagram ref no 22

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99610124251

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OE Match Complete Engine Gasket Set with Head Gaskets for Porsche 987 Boxster 2.7L M96.25

Carry out a complete engine rebuild with confidence using this OE Match Complete Engine Gasket Set, specifically engineered for the Porsche 987 Boxster 2.7ltr (2005 onwards) fitted with the M96.25 engine producing 176kW (239HP).

Fits:

• Porsche Boxster 987 2.7L 2005-08/08
• Porsche Cayman 2.7L 987C 2006-08

This comprehensive engine rebuild gasket kit contains all the major seals and gaskets required to professionally overhaul your engine, including both cylinder head gaskets. Manufactured to original equipment specifications, every component is precision engineered to provide excellent sealing performance, accurate fitment and long-lasting reliability throughout the rebuilt engine.

Whether you're rebuilding a high-mileage engine, replacing cylinder head gaskets or carrying out a complete restoration, this OE Match gasket set provides everything needed to restore factory sealing performance.

What Does a Complete Engine Gasket Set Do?

An engine gasket set provides the essential sealing components required between critical engine parts during assembly.

Its primary functions include:

• Sealing the combustion chambers.
• Maintaining engine compression.
• Preventing oil leaks.
• Preventing coolant leaks.
• Separating coolant and oil galleries.
• Maintaining correct engine operating pressures.
• Restoring original engine sealing performance.

Replacing every gasket during an engine rebuild ensures each sealing surface performs exactly as Porsche intended.

Why Replace the Complete Gasket Set?

Engine gaskets are compressed during installation and should never be reused once the engine has been dismantled. Fitting a complete gasket set ensures every sealing component is renewed, reducing the likelihood of future leaks and improving long-term engine reliability.

A complete gasket set is recommended when carrying out:

• Complete engine rebuilds.
• Cylinder head replacement.
• Engine reconditioning.
• Major oil leak repairs.
• Coolant leak repairs.
• High mileage engine refurbishment.
• Preventative maintenance.
• Performance engine builds.

Replacing only selected gaskets often results in additional labour and repeat repairs later.

Why Do Engine Gaskets Fail?

Engine gaskets are continually exposed to high temperatures, combustion pressures and thermal expansion.

Common causes of gasket failure include:

• Heat ageing.
• Thermal cycling.
• High mileage.
• Engine overheating.
• Oil contamination.
• Coolant contamination.
• Incorrect installation.
• Material fatigue over time.

Replacing all gaskets during an engine rebuild restores the sealing integrity of the engine and helps maximise reliability.

When Should a Complete Gasket Set Be Installed?

A complete engine gasket set should always be fitted whenever:

• Performing a complete engine rebuild.
• Removing the cylinder heads.
• Replacing head gaskets.
• Reconditioning the engine.
• Repairing significant oil leaks.
• Repairing coolant leaks.
• Carrying out preventative maintenance.
• Completing a professional engine overhaul.

Installing a complete gasket set during assembly minimises the risk of future leaks and ensures the highest quality rebuild.

OE Match Quality You Can Trust

This OE Match Complete Engine Gasket Set offers:

• Complete engine rebuild gasket kit.
• Includes both cylinder head gaskets.
• Manufactured to OE specifications.
• Premium sealing materials.
• Excellent resistance to heat, oil and coolant.
• Precision-engineered fitment.
• Direct replacement components.
• Ideal for professional engine rebuilding.
• Long service life and dependable reliability.       

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

999100M9625

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OE Match Complete Engine Gasket Set with Head Gaskets for Porsche 987 Boxster & Cayman 2.7ltr M97.20 (180kW / 245HP)

Carry out a professional engine rebuild with confidence using this OE Match Complete Engine Gasket Set, specifically developed for the Porsche 987 Boxster and Cayman 2.7ltr fitted with the M97.20 engine producing 180kW (245HP).

Fits:

• Porsche Boxster 987 2.7L 2005-08/08
• Porsche Cayman 2.7L 987C 2006-08

This comprehensive engine rebuild gasket kit contains the essential seals and gaskets required to completely rebuild your engine, including both cylinder head gaskets, making it the ideal solution for complete engine overhauls, cylinder head repairs, engine reconditioning and preventative maintenance.

Manufactured to original equipment specifications, every gasket and seal is precision engineered to provide excellent sealing performance, accurate fitment and long-lasting durability, helping restore your M97 engine to factory condition.

What Does a Complete Engine Gasket Set Do?

A complete engine gasket set provides all the major sealing components required during engine assembly to prevent leaks and maintain correct engine operation.

The gaskets and seals are designed to:

• Seal the combustion chambers.
• Maintain correct engine compression.
• Prevent oil leaks.
• Prevent coolant leaks.
• Separate oil and coolant galleries.
• Maintain correct engine operating pressures.
• Restore factory sealing performance throughout the engine.

Replacing every gasket during an engine rebuild ensures each sealing surface performs exactly as Porsche intended while helping maximise long-term reliability.

Why Replace the Complete Gasket Set?

Once an engine has been dismantled, the original gaskets become permanently compressed and should never be reused. Installing a complete gasket set ensures every sealing component is renewed, reducing the likelihood of future oil or coolant leaks.

A complete gasket set is recommended when carrying out:

• Complete engine rebuilds.
• Cylinder head replacement.
• Engine reconditioning.
• Major oil leak repairs.
• Coolant leak repairs.
• High-mileage engine refurbishment.
• Preventative maintenance.
• Performance engine builds.

Replacing only selected gaskets can compromise the quality of the rebuild and increase the risk of future sealing problems.

Why Do Engine Gaskets Fail?

Engine gaskets operate under constant heat, pressure and thermal expansion throughout their service life.

Common causes of gasket deterioration include:

• Heat ageing.
• High mileage.
• Thermal cycling.
• Engine overheating.
• Oil contamination.
• Coolant contamination.
• Incorrect installation.
• Natural material fatigue.

Replacing every gasket during an engine rebuild restores sealing integrity and helps maximise engine longevity.

When Should a Complete Gasket Set Be Installed?

A complete engine gasket set should always be fitted whenever:

• Performing a complete engine rebuild.
• Replacing cylinder head gaskets.
• Removing the cylinder heads.
• Reconditioning the engine.
• Repairing major oil leaks.
• Repairing coolant leaks.
• Carrying out preventative maintenance.
• Completing a professional engine overhaul.

Renewing every gasket during assembly helps prevent future leaks, reduces repeat labour and delivers a professional-quality rebuild.

OE Match Quality You Can Trust

This OE Match Complete Engine Gasket Set offers:

• Complete engine rebuild gasket kit.
• Includes both cylinder head gaskets.
• Manufactured to OE specifications.
• Premium sealing materials.
• Excellent resistance to heat, oil and coolant.
• Precision-engineered fitment.
• Direct replacement components.
• Ideal for professional engine rebuilding.
• Long service life and dependable reliability.       

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

999100M9720

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Engine head gasket. Fits: Cylinder 1-3 or 4-6.
2 per engine.



Fits:
Porsche 986 Boxster 2.7L 2003-04 (M96.23)
Porsche 987 Boxster 2.7L 2005-08 (M96.25)
Porsche 987C Cayman 2.7L 2007-08 (M97.20)

This product supersedes Porsche's old part numbers:
- 99610417007

Diagram ref no 24.

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99610417010

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Engine head gasket. Fits: Cylinder 1-3 or 4-6.
2 per engine.



Fits:
Porsche 986 Boxster 2.7L 2003-04 (M96.23)
Porsche 987 Boxster 2.7L 2005-08 (M96.25)
Porsche 987C Cayman 2.7L 2007-08 (M97.20)

This product supersedes Porsche's old part numbers:
- 99610417007

Click 'zoom in' for large parts diagram.
Diagram ref no 24.

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99610417010

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Chain adjuster sealing o-ring. 18,77 x 1,78
3 per engine. Price is for each.



Fits:
Porsche 996
Porsche 986 Boxster
Porsche 987 Boxster
Porsche 987C Cayman
Porsche 997.1 Gen

Click 'Zoom in' for large parts diagram.
Diagram ref no 25

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99970734440

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O-ring - 18.77 x 1.78 - for timing chain adjuster or tensioner. 

Fits:

Porsche 986 Boxster / S 1997-04 - x3 required
Porsche 987 Boxster / S 2005-08 - x3 required
Porsche 987 Cayman / S 2006-08 - x4 required

Porsche 996 Carrera 1998-05 - x3 required
Porsche 997-1 Carrera 2005-08 - x4 required

Diagram ref. 25.

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99970734440

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O ring seal water pipe, 39.3 x 3.53 mm
This original Porsche sealing ring is used in the engine cooling system, helping seal the coolant pipe connection and prevent coolant leaks.
Sold individually, 

Fits:
Porsche 987.1 Boxster 2005 - 2008
Porsche 987.2 Boxster 2009 - 2012
Porsche 987C.1 Cayman 2005 - 2008
Porsche 987C.2 Cayman 2009 - 2012

Diagram ref no 39

This O-ring is used on selected Porsche 987 Boxster and Cayman cooling system pipework.

What This Part Does / Functions
•  Seals the water pipe / coolant pipe connection
•  Helps prevent coolant leaks
•  Maintains cooling system pressure
•  Supports correct coolant flow through the engine and radiator circuit
•  Helps prevent air entering the cooling system
•  Replaces a hardened, flattened, cut or leaking original O-ring
•  Provides correct OE Porsche size, material and fitment
•  Supports correct reassembly after coolant pipe or hose service.

Why Replace This Part?
Coolant O-rings are exposed to heat cycles, coolant pressure, vibration and age-related rubber deterioration. Over time, the seal can harden, flatten, crack or lose elasticity. A worn O-ring may allow coolant seepage from the pipe connection, leading to coolant loss, pressure loss or low coolant warnings. Replacing it with a Genuine Porsche OE water pipe O-ring helps restore the correct seal and supports reliable cooling system operation.

Common Symptoms of a Failed Water Pipe O-Ring
•  Coolant leak around the water pipe connection
•  Dried coolant residue near the pipe joint
•  Low coolant warning
•  Coolant smell from the engine bay
•  Cooling system pressure loss
•  Air entering the cooling system
•  O-ring found flattened, cut or hardened during inspection
•  Coolant seepage after previous pipe or hose work.

When to Replace This Part
•  Whenever the water pipe or coolant pipe is removed
•  During coolant hose or pipe replacement
•  If coolant is leaking from the pipe connection
•  If the O-ring is hardened, flattened, cracked or damaged
•  During cooling system overhaul or repair
•  When replacing related coolant pipes, hoses or housings
•  After separating the water pipe connection
•  Whenever Porsche workshop procedure recommends replacing the seal after removal.

Where It Fits on the Car
This O-ring fits in the engine cooling system water pipe / coolant pipe connection. It is commonly shown in Porsche cooling diagrams in the feed and return water hose / coolant hose centre section area. Correct installation is important. The sealing surface should be clean, and the O-ring should be fitted without twisting, pinching or damage.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99610680107

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O ring seal water pipe, 39.3 x 3.53 mm
This OE Match O-ring seal is a replacement coolant pipe sealing ring used within the engine cooling system. It is designed to match the original-style fitment and function, helping restore a secure seal at the water pipe joint.
Sold individually

Fits:
Porsche 987.1 Boxster 2005 - 2008
Porsche 987.2 Boxster 2009 - 2012
Porsche 987C.1 Cayman 2005 - 2008
Porsche 987C.2 Cayman 2009 - 2012

Diagram ref no 39

The O-ring seals the water pipe connection to prevent coolant seepage or pressure loss. A correctly fitted seal helps maintain cooling system integrity, stable coolant circulation, and reliable engine temperature control.

Functions
•  Replaces the water pipe O-ring seal
•  Seals the coolant / water pipe connection
•  Helps prevent coolant leaks and seepage
•  Supports correct cooling system pressure
•  Suitable for water pipe, thermostat, radiator hose, or coolant system service
•  Replaces hardened, flattened, cracked, swollen, or damaged
•  O-rings OE Match replacement for Porsche 987 cooling system repair

Why Replace This Part?
Coolant O-rings can harden, flatten, crack, swell, or lose sealing ability due to heat cycles, coolant exposure, pressure, age, and previous service work. A worn or damaged O-ring may cause coolant leaks, low coolant warnings, pressure loss, overheating, or residue around the pipe connection. Replacing the seal helps restore proper coolant system sealing.

When to Replace This Part
•  Coolant is leaking around the water pipe connection
•  The water pipe or related hose has been removed
•  The original O-ring is hard, flattened, cracked, swollen, or damaged
•  Cooling system pressure loss is being investigated
•  Low coolant warnings are present
•  Preventative replacement is required during cooling system service
•  The vehicle is undergoing Porsche 987 Boxster or Cayman cooling system repair

Where it fits on the car
This O-ring fits at the water pipe connection within the engine cooling system on Porsche 987 Boxster and Cayman models. Exact position can vary depending on engine type and coolant pipe layout.

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99610680107

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