Coolant Hoses - Engine Bay

Breather line for coolant distributor.

Fits:

Porsche 987.2 Boxster 2008-12
Porsche 987C.2 Cayman 2008-12

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Diagram ref no 11

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9A110654931

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Coolant / water pipe.

Fits:
Porsche 987.2 Boxster 2.9L / 3.4L 2009-12
Porsche 987C.2 Cayman 2.9L / 3.4L 2009-12

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Diagram ref no 13

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9A110602531

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Distributor for coolant, Complete.

Fits:
Porsche 997.2 Carrera 2009-12
Porsche 997.2 Turbo 2010-13
Porsche 991.1 Carrera 2012-16
Porsche 991.2 Carrera 2017-19
Porsche 991 Turbo 2014-20
Porsche 992.1 Carrera 2019>>
Porsche 992 Turbo / Turbo S 2020>>

Porsche 987.2 Boxster 2.9L / 3.4L 2009-12
Porsche 981 Boxster 2012-16
Porsche 981 Boxster Spyder 2016
Porsche 982 (718) Boxster GTS 4.0L 2017>>
Porsche 982 (718) Boxster Spyder 2019>>

Porsche 987C.2 Cayman 2.9L / 3.4L 2009-12
Porsche 981C Cayman 2014-16
Porsche 981C Cayman GT4 2016
Porsche 982C (718C) Cayman GTS 4.0L 2017>>
Porsche 982C (718C) Cayman GT4 2019>>

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Diagram ref no 1

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0PB121187

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Coolant Pipe Connection Adapter. 

The Genuine Porsche Coolant Pipe Connection Adapter 9A110613201 is an original equipment replacement cooling system component designed for Porsche Boxster 987.2 and Cayman 987.2 models. Manufactured to Porsche's original specifications, this adapter provides a secure connection within the engine's coolant pipe assembly, helping maintain reliable coolant circulation and cooling system integrity.

Fits:

• Porsche Boxster 987 MKII 2.9L 2009-12
• Porsche Boxster S 987 MKII 3.4L 2009-12
• Porsche Cayman 2.9L 987C MKII 2009-12
• Porsche Cayman S / R 3.4L 987C MKII 2009-12  

Diagram Ref No 12

Also referred to as a coolant connection piece or engine coolant outlet flange, this component forms part of the cooling system pipework and helps maintain a leak-resistant connection between associated cooling circuit components.

The adapter is exposed to engine heat, coolant pressure, vibration and repeated temperature changes during normal operation. Over time, the original component or its sealing surfaces may deteriorate, potentially resulting in coolant leaks or reduced cooling system reliability.

Ideal for replacing damaged, cracked, leaking or deteriorated original adapters, this genuine Porsche component provides a direct OE replacement for maintaining the cooling system's original configuration.

What This Product Does:
The coolant pipe connection adapter forms part of the engine cooling system, providing a connection point between the associated coolant pipework and cooling circuit components.

It helps maintain a secure, sealed passage for coolant while supporting the cooling system's ability to regulate engine temperature effectively.

Its key functions include:

• Coolant Pipe Connection: Provides a secure connection between designated coolant pipes and associated cooling system components.
• Coolant Circulation: Allows coolant to pass through the connection point, supporting continuous circulation within the cooling circuit.
• Leak Prevention: Helps maintain a sealed connection to reduce the risk of coolant escaping.
• Cooling System Pressure: Supports the integrity of the pressurised engine cooling system.
• Engine Temperature Regulation: Contributes to efficient engine cooling by maintaining a reliable coolant flow path.
• Secure Component Fitment: Helps keep the connected coolant pipework correctly positioned and secured.
• Thermal Durability: Designed for exposure to engine operating temperatures and repeated heating and cooling cycles.
• Original Equipment Compatibility: Maintains the factory-designed cooling system connection and installation arrangement.

Symptoms Of Wear Or Failure:
Over time, prolonged exposure to engine heat, coolant pressure and vibration can cause coolant pipe adapters and their associated seals to deteriorate.

Common signs include:

• Visible Coolant Leaks: Coolant escaping around the adapter or adjoining pipe connections may indicate a damaged component or failed seal.
• Low Coolant Warning: Loss of coolant through a leaking connection may trigger a dashboard warning.
• Frequent Coolant Top-Ups: Repeated coolant loss can indicate a leak around the adapter or another cooling system component.
• Cracked or Damaged Adapter Housing: Physical cracks, fractures or deterioration may compromise the connection's ability to remain sealed.
• Deteriorated Sealing Surfaces: Worn, damaged or contaminated sealing areas may allow coolant to escape.
• Coolant Residue Around Connections: Dried coolant deposits or staining near the adapter may indicate previous or ongoing leakage.
• Loose or Insecure Connection: Damaged retaining components or worn connections may allow unwanted movement within the assembly.
• Coolant Smell from the Engine Bay: Escaping coolant contacting warm engine components may produce a distinctive sweet smell.
• Engine Overheating: Significant coolant loss can reduce the cooling system's ability to regulate engine temperature effectively.
• Fluctuating Engine Temperature: Coolant loss or air entering the cooling circuit may contribute to irregular temperature readings.
• Steam from the Engine Compartment: A severe leak may allow coolant to contact hot engine components, producing visible steam.

Why Replacement Matters:

• Replacing a worn or leaking coolant pipe connection adapter is essential for maintaining the reliability and integrity of your Porsche's engine cooling system.
• The cooling system relies on secure, leak-resistant connections between its hoses, pipes and associated components. If a connection adapter becomes cracked, damaged or incorrectly sealed, coolant can escape, reducing the system's ability to maintain the correct operating pressure and coolant level.
• Even a minor coolant leak can become progressively worse, particularly as the cooling system undergoes repeated heating and cooling cycles. Continued coolant loss may eventually lead to engine overheating and damage to important engine components.
• A severely damaged connection adapter can also fail unexpectedly, potentially causing rapid coolant loss and an unplanned vehicle breakdown.
• Installing a genuine Porsche replacement adapter helps restore the original cooling system connection, ensuring the component fits correctly within the specified pipework arrangement.
• Replacing damaged adapters and inspecting associated seals, hoses and retaining components can help prevent recurring coolant leaks and reduce the risk of more expensive cooling system or engine repairs.
• For Porsche Boxster and Cayman owners, maintaining the cooling system is particularly important for ensuring consistent engine temperature regulation during everyday driving and demanding operating conditions.
• The Genuine Porsche Coolant Pipe Connection Adapter 9A110613201 provides an original equipment replacement solution, helping maintain secure coolant connections, reliable cooling performance and long-term engine protection.

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9A110613201

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Coolant pipe seal. Pipe to Water Pump & Thermostat Housing.

Fits:
Porsche 987.2 Boxster 2009-12
Porsche 981 Boxster 2012-16
Porsche 981 Boxster Spyder 2016
Porsche 982 Boxster GTS 4.0 2019>>
Porsche 982 Boxster Spyder 2019>>
Porsche 987C Cayman 2009-12
Porsche 981C Cayman 2014-16
Porsche 981C Cayman GT4
Porsche 982C Cayman GTS 4.0L 2019>>
Porsche 982C Cayman GT4 2019>>
Porsche 997.2 Carrera 2009-12
Porsche 997.2 Turbo 2010-13
Porsche 991.1 Carrera 2012-16
Porsche 991.2 Carrera 2017-19
Porsche 991 Turbo 2014-20
Porsche 991 GT3 1014>>
Porsche 992.1 Carrera 2020>>
Porsche 992 Turbo 2020>>

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Diagram ref no 12

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0PB121437

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Engine coolant hose, return.

Fits:
Porsche 987.2 Boxster 2.9L / 3.4L 2009-12
Porsche 981C.2 Cayman 2.9L / 3.4L 2009-12
Porsche 997.2 Carrera 2009-12
Porsche 991.1 Carrera 2012-16

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Diagram ref no 16

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9A110661501

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Engine coolant hose - Return

Fits:
Porsche 987.2 Boxster 2.9ltr / 3.4ltr - 2009 to 2012
Porsche 981C.2 Cayman 2.9ltr / 3.4ltr - 2009 to 2012
Porsche 997.2 Carrera - 2009 to 2012
Porsche 991.1 Carrera - 2012 to 2016

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Diagram ref no 16

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9A110661501

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Engine coolant hose, feed.

Fits:
Porsche 987.2  Boxster 2.9L / 3.4L 2009-12
Porsche 987C.2  Cayman 2.9L / 3.4L 2009-12

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Diagram ref no 15

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9A110666031

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Engine Coolant Inlet Flange Drain Plug.
Sold Each.
x3 Required Per Car.

Fits:
Porsche 981 Boxster 2012>>2016
Porsche 981 Cayman 2014>>2016
Porsche 981 Boxster Spyder 2016>>2016
Porsche 982 Boxster GTS (718) 4.0L 2017>>
Porsche 982 Cayman GTS (718) 4.0L 2017>>
Porsche 982 Boxster Spyder (718) 2019>>
Porsche 987.2 Boxster MKII 2009>>2012
Porsche 987.2 Cayman MKII 2009>>2012
Porsche 991.1 Carrera MKI 2012>>2016
Porsche 991.2 Carrera MKII 2017>>2019
Porsche 991 Turbo / Turbo S / GT2 RS MKI / MKII 2014>>2020
Porsche 992.1 Carrera MKI 2019>>2024
Porsche 992.2 Carrera 2 3.0L MKII 2024>>
Porsche 992.1 Turbo / Turbo S MKI 2020>>
Porsche 997.2 Carrera MKII 2009>>2012
Porsche 997.2 Turbo / GT2 RS MKII 2010>>2013
Porsche 981 Cayman GT4 2016>>2016
Porsche 982 Cayman GT4 (718) 2019>>

Diagram Ref No 16

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0PB121099

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Heater Hose – Porsche 987.2 Boxster / Cayman 2009–2012 – 98710621230

This replacement heater hose is designed for the cooling and cabin heating system. It carries engine coolant through the heater circuit, helping maintain reliable cabin heating and correct coolant circulation.

Fits

• Porsche 987.2 Boxster 2.9L 2009–12.
• Porsche 987.2 Boxster S 3.4L 2009–12.
• Porsche 987C.2 Cayman 2.9L 2009–12.
• Porsche 987C.2 Cayman S / Cayman R 3.4L 2009–12.

Diagram Ref No 19

What This Product Does

This hose provides a coolant connection within the heating circuit. Its role is to convey coolant through the connected system, allowing circulation associated with cabin heating. Although shown alongside the expansion tank and associated fittings, the supplied component is a hose, not a coolant reservoir.

Functions

• Conveys coolant within the heater circuit.
• Provides a connection between adjoining components.
• Contains coolant along the hose connection when correctly installed.

Technical Details

• Genuine Porsche component, part number 98710621230.
• Diagram description: Heating hose.
• Listed diagram quantity: 1.
• Diagram application codes: A120, A121.
• Applications include the supplied 987 MKII Boxster and 987C MKII Cayman variants.
• Shown in the coolant-system assemblies for 987.2 Boxster / Boxster S and 987C.2 Cayman 2.9L / 3.4L, 2009–12.

Symptoms of Fault

• Damp patches or dried deposits at hose joints.
• A coolant odour following use.
• Coolant level dropping repeatedly or a low-level warning.
• Splits, swelling or hardened sections visible during inspection.
• Abnormally high coolant temperature or escaping steam.
• Weak cabin heating associated with insufficient coolant or trapped air.

These signs can have other cooling-system causes; inspect the hose and neighbouring connections before deciding which component needs replacement.

Why Replacement Matters

Repeated heating, internal pressure and movement can gradually degrade a coolant hose. Renewing a confirmed leaking or damaged component addresses the defective connection rather than relying on repeated coolant top-ups. Examine adjoining fittings, clamps and other hoses for deterioration while carrying out the repair. Follow the applicable Porsche workshop instructions for filling and bleeding after installation.

FAQs

Can leakage appear only after driving?
A small defect may become apparent as coolant temperature and system pressure increase, even if the connection appears dry during a cold inspection.

Do nearby connections need checking?
Inspect the mating fittings and clamps as well as the hose. Deposits around a joint do not establish which individual component is responsible.

How can slight coolant seepage be traced?
Pressure testing can help locate a leak that is difficult to identify visually.

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98710621230

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Oil and Coolant Filler Cup Cover.

Fits:
Porsche 987 Boxster 2005-08
Porsche 987C Cayman 2005-08

Porsche 987 Gen 2 Boxster 2009-12
Porsche 987C Gen 2 Cayman 2009-12

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Diagram ref no 2

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98710618000

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Oil And Coolant Filler Cup.
Oil And Coolant Caps With Seals Included.

Fits:
Porsche 987.1 Boxster MKI 2005>>2008
Porsche 987.2 Boxster MKII 2009>>2012
Porsche 987.1 Cayman MKI 2005>>2008
Porsche 987.2 Cayman MKII 2009>>2012

Diagram Ref No 1 (Diagram Ref No 3, 4, 5 And 6 Included)

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98710615002

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O-ring – 46.7 x 3.53 – used in various applications within the car's cooling system.

Fits:
Porsche 987 Boxster 2005-12
Porsche 987 Cayman 2006-12

Porsche 981 Boxster 2012-16 
Porsche 981 Boxster Spyder 2016 
Porsche 981 Cayman 2014-16 
Porsche 981 Cayman GT4 2016 

Porsche 718 (982) Boxster 2017>> 
Porsche 718 (982) Boxster Spyder 2019>>
Porsche 718 (982) Cayman 2017>>
Porsche 718 (982) Cayman GT4 2019>>

Porsche 996 GT3 / RS 1999-05
Porsche 996 Turbo / GT2 2001-05

Porsche 997 Carrera 2005-12
Porsche 997 Turbo / GT2 RS 2007-13
Porsche 997 GT3 / RS 2007-11

Porsche 991 Carrera 2012-19
Porsche 991 Turbo / GT2 RS 2014-20
Porsche 991 GT3 / RS 2014-21

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99610680103

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O-ring – 46.7 x 3.53 – used in various applications within the car's cooling system.

Fits:
Porsche 987 Boxster 2005-12
Porsche 987 Cayman 2006-12

Porsche 981 Boxster 2012-16 
Porsche 981 Boxster Spyder 2016 
Porsche 981 Cayman 2014-16 
Porsche 981 Cayman GT4 2016 

Porsche 718 (982) Boxster 2017>> 
Porsche 718 (982) Boxster Spyder 2019>>
Porsche 718 (982) Cayman 2017>>
Porsche 718 (982) Cayman GT4 2019>>

Porsche 996 GT3 / RS 1999-05
Porsche 996 Turbo / GT2 2001-05

Porsche 997 Carrera 2005-12
Porsche 997 Turbo / GT2 RS 2007-13
Porsche 997 GT3 / RS 2007-11

Porsche 991 Carrera 2012-19
Porsche 991 Turbo / GT2 RS 2014-20
Porsche 991 GT3 / RS 2014-21

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99610680103

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Water Coolant Hose For Expansion Tank. 

Fits:
Porsche 987.1 Boxster / Boxster S 2005>>2008
Porsche 987.2 Boxster / Boxster S 2009>>2012
Porsche 987.1 Cayman / Cayman S 2006>>2008
Porsche 987.2 Cayman / Cayman S 2009>>2012

Diagram Ref No 10

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98710627002

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Water Coolant Hose For Expansion Tank. 

Fits:
Porsche 987.1 Boxster / Boxster S 2005>>2008
Porsche 987.2 Boxster / Boxster S 2009>>2012
Porsche 987.1 Cayman / Cayman S 2006>>2008
Porsche 987.2 Cayman / Cayman S 2009>>2012

Diagram Ref No 10

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