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Gaskets & Sets
By OE Match
- 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 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche Carrera GT 2003-06
This OE match O-ring is a direct replacement for the original Porsche sealing ring used within the water cooling systems of Porsche 996 Turbo, 996 GT3, 997 Turbo, and 997 GT3 models. Manufactured to OE specifications, it features precise dimensions of 39.20mm x 3.00mm to ensure correct sealing performance and factory-style fitment.
Sold individually
Fits:
Porsche 996 turbo - 2000 to 2005
Porsche 996 GT3 - 1999 to 2004
Porsche 997.1 turbo - 2007 to 2009
Porsche 997 GT3 - 2007 to 2011
Porsche Carrera GT - 2003 to 2006
Porsche 918 Spyder
Diagram ref no 14
Proper sealing within the cooling system is essential for maintaining coolant pressure and preventing leaks that could lead to overheating or engine damage. OE Match construction ensures compatibility with original Porsche cooling system components and reliable sealing performance under demanding operating conditions.
Ideal for preventative maintenance, cooling system servicing, or engine rebuild work, this O-ring helps restore proper sealing integrity and reliable coolant circulation.
The O-ring creates a pressure-tight seal between cooling system components, preventing coolant leaks and maintaining correct cooling system pressure. It helps ensure efficient coolant circulation and reliable engine temperature control.
Function
• Seals coolant system connections and housings
• Prevents coolant leakage under pressure
• Maintains correct cooling system pressure
• Supports reliable engine temperature regulation
• Resists heat, coolant exposure, and pressure cycling
Cooling system O-rings harden and lose elasticity over time due to heat exposure, coolant chemicals, and pressure cycling. A deteriorated seal can cause coolant leaks, pressure loss, overheating, and potential engine damage. Replacing worn O-rings during servicing helps maintain cooling system integrity and prevents costly repairs.
When to replace
• Coolant leaks around sealed connections
• During cooling system disassembly or servicing
• Signs of flattened, cracked, or hardened seals
• Loss of coolant pressure
• During engine rebuild or preventative maintenance
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970741040
The product you are viewing cross references to these numbers
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belt tensioner and belt drive 997 GT3 M97.76 2007-09 101-15
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belt tensioner and belt drive 997 GT3 / GT3 RS M97.77 2010-11 and 997 GT3 RS 4.0 M97.74 2011 101-16
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water pump, water pump housing 997 GT3 M97.76 2007-09 105-00
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water pump, water pump housing 997 GT3 / GT3 RS M97.77 2010-11 and 997 GT3 RS 4.0 M97.74 2011 105-01
OEMatch Gaskets & Sets — Fit, Function, Confidence
Gaskets & sets restore sealing between critical engine surfaces on Porsche models, preventing oil, coolant and combustion gas leaks and helping to maintain compression. OEMatch supplies a broad selection of parts aimed at keeping Porsche vehicles on the road across generations. OEMatch gaskets & sets are compatible replacements engineered to original-spec dimensions and tolerances — a practical option when genuine or OEM parts are unavailable.
Available Types
- Complete engine gasket kits for full rebuilds
- Head gaskets and multi-layer steel head seals
- Valve cover and rocker cover gaskets
- Oil pan and sump gaskets
- Intake manifold gaskets and seal sets
Understanding OEMatch Gaskets & Sets
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original gaskets & sets.
OE (Original Equipment) refers to parts matching original specifications for the gaskets & sets and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM gaskets & sets engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
Gaskets are produced from composite, metal and elastomer materials chosen for heat, pressure and chemical resistance and are installed between mating surfaces such as the cylinder head, intake manifold and oil pan to maintain seals under extreme operating conditions.
Benefits Include
- Restores compression integrity and engine sealing
- Reduces oil and coolant leaks to protect components
- Simplifies rebuilds with complete kits that group required seals
Why Gaskets & Sets Wear and Fail
- Exposure to repeated high temperature cycles and pressure fluctuations leading to material fatigue
- Incorrect installation or improper torque sequencing during assembly
- Warped or uneven mating surfaces causing localised leakage
The Importance of Replacing with OEMatch Gaskets & Sets
Timely replacement of worn or damaged gaskets prevents cross-contamination of fluids, avoids loss of compression and reduces the risk of overheating and engine damage. For Porsche engines, correct gasket selection and careful installation also support component longevity and consistent operation under sustained loads and high temperatures. Using a complete kit during an overhaul can reduce repeat work and help ensure all sealing interfaces are addressed together.
Advantages
- Complete kits reduce the need to source multiple individual seals
- Materials chosen for resistance to heat, oil and coolant exposure
- Coverage aimed at both classic air-cooled and modern water-cooled Porsche engines
