Water / Coolant Pumps

Water pump & housing.

Fits:

• Porsche Boxster 987 MKII 2.9L 2009-2012
• Porsche Boxster S 987 MKII 3.4L 2009-2012
• Porsche 997 MKII Carrera C2 3.6L 2009-12
• Porsche 997 MKII Carrera C4 3.6L 2009-12
• Porsche 997 MKII Carrera C2S 3.8L 2009-12
• Porsche 997 MKII Carrera C4S 3.8L 2009-12
• Porsche Cayman 2.9L 987C MKII 2009-12
• Porsche Cayman S / R 3.4L 987C MKII 2009-12

Diagram ref no 1

Previous Porsche numbers:
- 9A110603800,
- 9A110603802,
- 9A110603804,
- 9A110603807,
- 9A110603808,
- 9A110603809,

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9A110603810

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Water Pump with Housing – Complete Cooling System Replacement
Pump comes with gasket

This water pump with integrated housing is designed for Porsche 987.2 Boxster, 987.2 Cayman, and 997.2 models, providing a complete and reliable solution for restoring engine cooling performance. Supplied as a fully assembled unit, this component ensures correct coolant circulation while eliminating potential sealing and alignment issues associated with reusing worn housings.

Fits:

• Porsche Boxster 987 MKII 2.9L 2009-2012
• Porsche Boxster S 987 MKII 3.4L 2009-2012
• Porsche 997 MKII Carrera C2 3.6L 2009-12
• Porsche 997 MKII Carrera C4 3.6L 2009-12
• Porsche 997 MKII Carrera C2S 3.8L 2009-12
• Porsche 997 MKII Carrera C4S 3.8L 2009-12
• Porsche Cayman 2.9L 987C MKII 2009-12
• Porsche Cayman S / R 3.4L 987C MKII 2009-12

Diagram ref no 1

The water pump plays a vital role in circulating coolant through the engine, radiators and heater circuit, helping maintain stable operating temperatures under all driving conditions. The housing supports the pump and forms part of the sealed cooling circuit, making it essential that both components are in optimal condition for long-term reliability.

What the Water Pump & Housing Do

This combined unit:

• Circulates coolant efficiently throughout the engine and cooling system
• Maintains stable engine operating temperature
• Supports correct cooling system pressure
• Provides secure mounting and sealing via the integrated housing
• Ensures consistent cooling performance during daily and spirited driving

A properly functioning pump and housing are essential to protect the engine from overheating.

Why Water Pumps & Housings Fail

Common causes of failure include:

• Internal bearing wear, leading to noise or pump seizure
• Coolant seal deterioration, causing leaks
• Thermal cycling, weakening the housing over time
• Coolant contamination, accelerating internal wear
• Age and mileage, particularly on performance-driven vehicles

Early warning signs may include coolant leaks, whining noises from the pump area, rising engine temperatures or cooling system warning messages.

Why the Water Pump Should Be Replaced with the Housing

Replacing the pump together with its housing provides:

• Improved sealing reliability compared to reusing an old housing
• Correct alignment and fitment straight out of the box
• Reduced labour time during installation
• Lower risk of repeat leaks or failures
• Peace of mind for long-term cooling system performance

This approach is strongly recommended during cooling system repairs or preventative maintenance.

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9A110603810

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Water Pump Bracket.

Fits:
Porsche 997 Turbo / GT2 MKI 3.6L M97.70 2006>>2009
Porsche 997 Turbo / GT2 RS MKII 3.6L M97.70 2010>>2011
Porsche 997 GT3 MKI 3.6L M97.76 2006>>2009

Diagram Ref No 32

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99611552173

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Water pump gasket.



Fits:
Porsche 987 Boxster / Boxster S 2005-08
Porsche 987C Cayman / Cayman S 2006-08
Porsche 997 Turbo / GT2 2007-11
Porsche 997 GT3 3.6L 2007-09

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Diagram ref no 2

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99710634000

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Water pump gasket.



Fits:
Porsche 987 Boxster / Boxster S 2005-08
Porsche 987C Cayman / Cayman S 2006-08
Porsche 997 Turbo / GT2 2007-11
Porsche 997 GT3 3.6L 2007-09

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Diagram ref no 2

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99710634000

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Water pump gasket.



Fits:
Porsche 987.2 Boxster / Boxster S 2009-12
Porsche 981 Boxster / Boxster S / Boxster Spyder 2012-16
Porsche 982 (718) Boxster / Boxster S 2017>>
Porsche 987.2 Cayman / Cayman S 2009-12
Porsche 981 Cayman / Cayman S / Cayman GT4 2014-16
Porsche 982 (718) Cayman / Cayman S 2017>>
Porsche 997.2 2009-12
Porsche 991.1 2012-16
Porsche 991.2 2017>>

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Diagram ref no 4

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0PB121091A

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Water pump gasket. Porsche 997 / 991 / Boxster / Cayman



Fits:
Porsche 987.2 Boxster / Boxster S 2009-12
Porsche 981 Boxster / Boxster S / Boxster Spyder 2012-16
Porsche 982 (718) Boxster / Boxster S 2017>>
Porsche 987.2 Cayman / Cayman S 2009-12
Porsche 981 Cayman / Cayman S / CAyman GT4 2014-16
Porsche 982 (718) Cayman / Cayman S 2017>>
Porsche 997.2 2009-12
Porsche 991.1 2012-16
Porsche 991.2 2017>>

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Diagram ref no 4

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0PB121091A

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Water pump thermostat gasket set.
Porsche ref numbers: 9A110630500, 99970762540 9A110655800.



Fits:
Porsche 987.2 Boxster 2009-12
Porsche 987C.2 Cayman 2009-12
Porsche 997.2 2009-12
Porsche 997.2 Turbo 2010-13
Porsche 991 R / GT3 / GT3 RS 2014 >>

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Diagram Ref No 20, 21 and 22.

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9A110630500SET

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Water pump thermostat gasket.



Fits:
Porsche 987.2 Boxster 2009-12
Porsche 987C.2 Cayman 2009-12
Porsche 997.2 2009-12
Porsche 997.2 Turbo 2010-13
Porsche 991 R / GT3 / GT3 RS 2014 >>

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Diagram Ref No 20

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9A110630500

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Water Pump Thermostat Insert.

This Wahler Water Pump Thermostat Insert is a Porsche 987.2 / 997.2 / 991.1 cooling system component designed to regulate coolant flow within the engine cooling circuit. Installed within the thermostat housing or water pump assembly, this thermostat insert opens and closes at predetermined temperatures to control coolant circulation between the engine and radiator.

Fits:

• Porsche Boxster 987 MKII 2.9L 2009-12
• Porsche Boxster S 987 MKII 3.4L 2009-12
• Porsche 997 MKII Carrera C2 3.6L 2009-12
• Porsche 997 MKII Carrera C4 3.6L 2009-12
• Porsche 997 MKII Carrera C2S 3.8L 2009-12
• Porsche 997 MKII Carrera C4S 3.8L 2009-12
• Porsche 997 MKII Turbo 2010-13
• Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
• Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
• Porsche Cayman 2.9L 987C MKII 2009-12
• Porsche Cayman S / R 3.4L 987C MKII 2009-12

Diagram Ref No 21

What This Product Does:

• Regulates coolant flow through the engine cooling system
• Maintains optimal engine operating temperature
• Controls engine warm-up and cooling efficiency
• Works with the water pump to ensure effective coolant circulation
• Helps prevent overheating and overcooling
• Supports fuel efficiency and emissions performance

Symptoms Of Wear Or Failure:

• Engine overheating
• Engine running too cool or warming up slowly
• Fluctuating temperature gauge readings
• Poor heater performance inside the cabin
• Coolant leaks around the thermostat housing    
• Reduced fuel economy caused by incorrect operating temperature
• Check engine light related to cooling system faults  

Why Replacement Matters:

• Restores proper coolant flow and temperature regulation
• Prevents overheating and potential engine damage
• Improves engine efficiency and fuel economy
• Ensures reliable heater and climate control operation
• Protects cooling system components from excessive wear and stress
• Maintains long-term engine reliability and performance

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

9A110622503

The product you are viewing cross references to these numbers

Water pump thermostat insert.

Fits:
Porsche 997 GT3 3.8L 2009 - 2011
Porsche 997 GT3 4.0L 2010 - 2011

Diagram Ref No 8

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9GT121113

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Water Pump Thermostat Insert.

The Wahler Water Pump Thermostat Insert is a Porsche 997 GT3 cooling system component designed to regulate coolant flow through the engine and radiator system. Installed within the thermostat or water pump housing, this insert opens and closes at specific temperatures to ensure the engine maintains its ideal operating range for efficiency, performance, and reliability.

Fits:

• Porsche 997 MK1 GT3 2007-09
• Porsche 997 MKII GT3 2010-11 

Diagram Ref No 8 

What This Product Does:

• Regulates coolant circulation through the engine cooling system
• Maintains optimal engine operating temperature
• Controls engine warm-up and cooling efficiency
• Works with the water pump and radiator to stabilise temperatures
• Helps prevent overheating and overcooling
• Supports fuel efficiency, emissions control, and engine performance

Symptoms Of Wear Or Failure:

• Engine overheating Engine running too cool or slow to reach operating temperature
• Fluctuating temperature gauge readings
• Poor cabin heater performance
• Coolant leaks around the thermostat housing
• Reduced fuel efficiency caused by incorrect engine temperature
• Check engine light related to cooling system faults  

Why Replacement Matters:

• Restores proper coolant flow and temperature regulation
• Prevents overheating and potential engine damage
• Improves engine efficiency and fuel economy
• Ensures reliable heating and climate control performance
• Protects cooling system components from excessive stress and wear
• Maintains long-term engine reliability and performance

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9GT121113

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Thermostat on water pump.



Fits:
Porsche 987.2 Boxster 2009-12
Porsche 987C.2 Cayman 2009-12
Porsche 997.2 2009-12
Porsche 997.2 Turbo 2010-13
Porsche 991 R / GT3 / GT3 RS 2014 >>

This part number has been superseded from previous numbers:
- 9A110622502

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Diagram Ref No 21

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9A110622503

The product you are viewing cross references to these numbers

Thermostat on water pump.

Fits:
Porsche 987.2 Boxster 2009-12
Porsche 987C.2 Cayman 2009-12
Porsche 997.2 2009-12
Porsche 997.2 Turbo 2010-13
Porsche 991 R / GT3 / GT3 RS 2014 >>

This part number has been superseded from previous numbers:
- 9A110622501
- 9A110622502

Diagram Ref No 21

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9A110622503

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Water Pump to Thermostat Housing Tube.



Fits:
Porsche 987.2 Boxster 2009-12
Porsche 981 Boxster 2013-16
Porsche 981 Boxster Spyder 2016
Porsche 987.2 Cayman 2009-12
Porsche 981 Cayman 2013-16
Porsche 981 Cayman GT4 2016
Porsche 997.2 2009-12
Porsche 997.2 Turbo 2010-13
Porsche 991 2012>>
Porsche 991 Turbo / GT2 RS 2014>>
Porsche 991 R / GT3 / GT3 RS 2014>>

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Diagram ref no 11

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0PB121076

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Water pump tube gasket.



Fits:
Porsche 987.2 Boxster 2009-12
Porsche 981 Boxster 2012-16
Porsche 981 Boxster Spyder 2016
Porsche 987.2 Cayman 2009-12
Porsche 981C Cayman 2014-16
Porsche 981 Cayman GT4 2016
Porsche 997.2 Carrera / Turbo 2009-12
Porsche 991.1 Carrera / Turbo 2013-16
Porsche 991.2 Carrera / Turbo 2017>>
Porsche 991 GT3 / GT3 RS / R 2014-17

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Diagram ref no 15

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