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Pipes
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- 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 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 TURBO 2007-09
- Porsche 997 MK1 GT2 2007-09
For Cars With Tiptronic Gearbox ONLY!
Fits:
Porsche 996 Carrera 2002>>2005
Cars With Option Codes:
338 - Rear-Wheel Drive
339 - All-Wheel Drive
Porsche 996 Turbo / GT2 2001>>2005
Porsche 997.1 Carrera MKI 2005>>2008
Porsche 997.1 Turbo / GT2 MKI 2007>>2009
Diagram Ref No 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
0009971171
The product you are viewing cross references to these numbers
.jpg?width=197 "Water Hose. Porsche 996 / 997 Carrera / Turbo / GT2 2000-09 - 99630771113, 99630771110, 99630771112")
- 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 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 TURBO 2007-09
- Porsche 997 MK1 GT2 2007-09
The Genuine Porsche Water Hose is a replacement coolant hose used within the Tiptronic automatic-transmission ATF cooler circuit on selected Porsche 911 models.
Fits:
- Porsche 996 C2 3.6L 2002-2005
- Porsche 996 C4 3.6L 2002-2005
- Porsche 996 C4S 3.6L 2002-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- 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 TURBO 2007-09
- Porsche 997 MK1 GT2 2007-09
Diagram Ref No 16
Although positioned within the transmission oil cooler system, this hose carries engine coolant rather than automatic transmission fluid. Coolant circulates through the ATF heat exchanger, allowing heat to be transferred between the transmission fluid and the engine cooling system.
Maintaining this coolant flow helps the Tiptronic transmission reach and remain within an appropriate operating temperature range during normal driving, motorway use and higher-load conditions.
As the hose ages, repeated heat cycles, cooling-system pressure and exposure to coolant can cause the rubber to harden, swell, crack or leak. Replacing a deteriorated hose helps restore a sealed cooling circuit and reliable coolant flow through the ATF heat exchanger.
What This Product Does:
The water hose forms part of the coolant circuit serving the Tiptronic transmission heat exchanger.
It is designed to:
- Carry engine coolant through the ATF cooler circuit.
- Support transmission-fluid temperature regulation.
- Maintain coolant circulation through the heat exchanger.
- Help remove excess heat from the automatic transmission fluid.
- Help the transmission reach an appropriate operating temperature.
- Maintain cooling-system pressure.
- Prevent coolant loss when correctly sealed.
- Replace a cracked, hardened or leaking original hose.
- Support reliable Tiptronic transmission cooling.
Symptoms Of Wear Or Failure:
Possible symptoms include:
- Visible coolant leakage.
- Coolant dripping beneath the vehicle.
- Dampness around the hose or connections.
- Dried coolant residue around hose ends.
- Gradual loss of coolant.
- Coolant-level warning.
- Sweet coolant smell after driving.
- Hose becoming hard or brittle.
- Surface cracking.
- Swelling or bulging.
- Soft or spongy areas.
- Leakage when the engine reaches operating temperature.
- Cooling-system pressure loss.
- Engine temperature becoming unstable.
- ATF temperature increasing under heavy use if coolant circulation is compromised.
Why Replacement Matters:
Replacement may be appropriate when:
- Coolant leakage is confirmed.
- Dried coolant residue is visible.
- The hose is cracked.
- Rubber has become hard.
- The hose is swollen.
- Soft spots are present.
- Hose ends no longer seal correctly.
- The hose has been damaged during transmission or cooling-system work.
- The ATF cooler is being replaced or serviced.
- The cooling system is undergoing preventative refurbishment.
- The original hose is old and its condition is uncertain.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99630771113
The product you are viewing cross references to these numbers
Porsche Transmission Coolant Pipes - Essential Gearbox Cooling Flow Components
Porsche transmission coolant pipes carry coolant between the gearbox, coolant control valves, and transmission oil coolers, ensuring consistent temperature regulation under all driving conditions. By maintaining correct coolant flow, these pipes protect transmission oil, seals, and internal components from overheating and premature wear.
Available from Design911, transmission coolant pipes are supplied to OEM specifications, making them suitable for maintenance, repairs, and complete cooling system refurbishments.
What Do Porsche Transmission Coolant Pipes Do?
Transmission coolant pipes form the physical flow network of the gearbox cooling system.
Core Functions:
- Transport coolant to and from the transmission oil cooler
- Maintain stable gearbox operating temperatures
- Support efficient transmission oil cooling
- Prevent thermal stress on internal gearbox components
- Enable correct operation of coolant control and change over valves
Healthy coolant pipes are essential for reliable transmission thermal management.
Why Do Transmission Coolant Pipes Fail?
Transmission coolant pipes are exposed to heat, pressure, vibration, and environmental conditions.
Common Causes of Failure:
- Corrosion in metal pipes from age or coolant degradation
- Cracking or hardening of plastic and rubber sections
- Heat cycling causing material fatigue
- Leaks at pipe joints or O-ring connections
- Physical damage from road debris or incorrect installation
Failure can result in coolant loss, overheating, and transmission damage.
When Should Transmission Coolant Pipes Be Replaced?
Porsche transmission coolant pipes should be inspected and replaced when signs of deterioration appear.
Replacement Indicators:
- Visible coolant leaks or staining
- Cracked, swollen, or brittle pipe sections
- Repeated low coolant warnings
- Overheating or inconsistent transmission temperatures
- During transmission or cooling system servicing
Preventative replacement helps avoid sudden coolant loss and expensive gearbox repairs.
Highlights
- Essential Porsche gearbox cooling system components
- Maintains reliable coolant flow and temperature control
- OEM-spec fitment and durability
- Suitable for road, fast-road, and performance applications
- Helps prevent overheating and premature gearbox wear
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