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.jpg?width=440&height=320 "Seal ring thermostat housing. Porsche 958 Cayenne 3.6ltr - WHT000863")
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- Porsche 958 Cayenne V6 3.6L Petrol 300Hp 2010-17
Thermostat Housing Seal Ring for Porsche 958 Cayenne 3.6L – Essential Cooling System Sealing Component
This thermostat housing seal ring is designed
specifically for the Porsche 958 Cayenne 3.6-litre engine, providing a
critical seal between the thermostat and its housing. Its role is to maintain
system pressure and prevent coolant leaks, ensuring the engine operates within
its correct temperature range under all driving conditions.
Fits:
- Porsche 958 Cayenne V6 3.6L Petrol 300Hp 2010-17
Diagram ref no 11
Even though it is a small component, the thermostat housing seal ring plays a major role in cooling system reliability. Over time, heat cycling, coolant exposure and age can cause the seal to harden, flatten or crack—leading to coolant leaks, pressure loss and potential overheating. Replacing the seal during thermostat service or cooling system repairs is essential preventative maintenance.
What the Thermostat Housing Seal Ring Does
This sealing ring:
- Creates
a watertight seal between the thermostat and housing
- Maintains correct cooling system pressure
- Prevents
coolant leaks during engine operation
- Supports accurate thermostat function
- Ensures stable engine temperature regulation
A properly sealing thermostat housing is vital for efficient cooling performance.
Why Thermostat Housing Seal Rings Fail
Common causes of failure include:
- Heat
cycling, causing the seal to harden or lose elasticity
- Coolant
chemical exposure, degrading the sealing material
- Compression
set, where the seal flattens over time
- Improper
installation, leading to pinching or distortion
- Age-related material fatigue, especially on higher-mileage vehicles
Symptoms often include coolant residue around the housing, low coolant warnings or unexplained coolant loss.
Why the Seal Ring Should Be Replaced
Replacing the thermostat housing seal ring provides:
- Restored leak-free cooling system operation
- Correct
pressure retention for efficient coolant flow
- Prevention of overheating and engine stress
- Reliable sealing after thermostat replacement
- Low-cost protection against expensive cooling repairs
It is strongly recommended to replace the seal ring whenever the thermostat is removed or serviced.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
WHT000863
The product you are viewing cross references to these numbers
- 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 3.6L 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
- Porsche 997 MK1 GT3 2007-09
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
- Porsche 955 Cayenne Turbo S 4.5L 2006>>
(*on Porsche 996 Turbo there is also an additional of same the sensor used for Oil temperature)
Fits:
Porsche 986 Boxster 2.7L & 3.2L - for Coolant temperature
Porsche 996 Carrera 3.6L - for Coolant temperature
Porsche 996 Turbo - for Coolant & Oil temperature*
Porsche 996 GT3 - for Coolant temperature
Porsche 997 2005-08 -for Coolant temperature
Porsche 997 GT3 - for Coolant temperature
Porsche 955 Cayenne S & Turbo - Coolant temperature
Diagram Ref No 29.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99660641000
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
- Porsche 955 Cayenne Turbo S 4.5L 2006>>
Fits:
Porsche 955 Cayenne S 4.5L V8
Porsche 955 Cayenne Turbo 4.5L
Click 'Zoom in' for large parts diagram.
Diagram Ref No 9.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94810612303
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
- Porsche 955 Cayenne Turbo S 4.5L 2006>>
Fits:
Porsche 955 Cayenne S 4.5L V8 2003-06
Porsche 955 Cayenne Turbo 4.5L 2003-06
Click 'Zoom in' for large parts diagram.
Diagram Ref No 11.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94810640101
The product you are viewing cross references to these numbers