Front engine coolant return pipe / line hose. Porsche 997.1 / 997.2  ❭  99710665204

Front engine coolant return pipe / line hose
This original Porsche coolant return pipe forms part of the front radiator cooling circuit, helping return coolant through the vehicle’s cooling system to maintain correct engine temperature and system pressure.

Fits:
Porsche 997.1 Carrera 3.6L 2005 - 2008  (Engine code: 9605)
Porsche 997.1 Carrera 3.8L 2005 - 2008  (Engine code: 9701)
Porsche 997.1 Turbo 3.6L 2007 - 2009 (Engine code: 9770)
Porsche 997.2 Carrera 3.6L 2009 - 2012 (Engine code: A102)
Porsche 997.2 Carrera 3.8L 2009 - 2012 (Engine code: A101)
Porsche 997.2 Turbo 3.8L 2010 - 2013 (Engine code: A170)
Porsche 997 GT3 3.6L 2007 - 2010 (Engine code: 9776)

Diagram ref no 16

This part supersedes / cross-references the earlier Porsche numbers: 99710665202, 99710665203

What This Part Does / Functions
•  Returns coolant within the front radiator cooling circuit
•  Connects into the front coolant pipework and radiator return system
•  Helps maintain correct coolant circulation between the engine and front radiators
•  Supports stable engine operating temperature
•  Helps maintain cooling system pressure and flow
•  Replaces a leaking, cracked, corroded or damaged original return pipe
•  Provides correct OE Porsche shape, routing and connection points
•  Supports reliable cooling system performance on high-performance 997 models.

Why Replace This Part?
The coolant return pipe is exposed to heat cycles, coolant pressure, road debris, vibration and age-related deterioration. Over time, the pipe or its connections can become brittle, corroded, cracked or begin to leak. A failing coolant return pipe may cause coolant loss, low coolant warnings, overheating, pressure loss or visible leaks around the front radiator pipework. Replacing it with a Genuine Porsche OE coolant return pipe helps restore correct coolant flow and factory fitment. This is especially important on performance models such as the 997 Turbo, 997 GT2 and 997 GT3, where efficient cooling is essential for engine reliability.

When to Replace This Part
•  If coolant is leaking from the front radiator return pipework area
•  If the pipe is cracked, corroded, damaged or distorted
•  If coolant loss or low coolant warnings are present
•  If the cooling system is not holding pressure correctly
•  During front radiator or coolant hose replacement
•  During front-end cooling system overhaul
•  After accident damage or impact to the front cooling circuit
•  When restoring the cooling system with correct OE Porsche parts.

Where It Fits on the Car
This part fits in the front coolant system / front radiator circuit. It is part of the coolant return pipework that routes coolant from the front radiator area back through the vehicle’s cooling system.

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

99710665204

The product you are viewing cross references to these numbers