Engine coolant supply hose. Porsche 997.2 Carrera C2 / C4 / C2S / C4S / Turbo  ›  99710683131

Engine coolant supply hose
Engine coolant supply hose by Porsche for the specified 997.2 Carrera and Turbo models. The supplied cooling diagrams identify this component as a supply hose within the engine coolant circuit.

Fits

• Porsche 997.2 Carrera C2 3.6L 2009 – 2012
• Porsche 997.2 Carrera C4 3.6L  2009 – 2012
• Porsche 997.2 Carrera C2S 3.8L  2009 – 2012
• Porsche 997.2 Carrera C4S 3.8L  2009 – 2012
• Porsche 997.2 Turbo 2010 – 2013

Diagram ref no 1

What This Product Does

This hose carries coolant along the engine's supply circuit. It forms part of the fluid pathway used by the cooling system to manage engine temperature; it is not the return hose or a coolant pipe shown elsewhere in the assembly.

Functions

• Provides a passage for coolant on the supply side.
• Connects components within the engine cooling circuit.
• Supports coolant movement needed for temperature regulation.

Technical Details

• Porsche part number: 99710683131.
• Component type: engine water/coolant hose.
• Diagram identification: supply.

Symptoms of Fault

• Falling coolant level or repeated coolant-level warnings.
• Sweet-smelling coolant around the engine compartment.
• Moisture, staining or dried deposits at hose connections.
• Cracks, swelling or unusually soft areas in the hose.
• Leakage becoming apparent after the engine is switched off.
• Rising temperature readings, steam or gurgling.

These signs can also originate from other cooling components, so confirm the leak source before replacing the hose.

Why Replacement Matters

Age, repeated heating and cooling, and deterioration at connections can leave a hose unable to retain coolant. Renewing a confirmed damaged hose addresses that leakage and helps restore the coolant pathway. Inspect associated clamps, fittings and neighbouring hoses during the repair rather than assuming the hose alone explains every symptom.

FAQs

Why might leakage appear only when hot?
Changes in temperature and system pressure can reveal deterioration that is not apparent when cold.

How should a suspected leak be located?
A cooling-system pressure test, followed by inspection of hose ends and nearby fittings, can help identify its source.

Could gurgling indicate a hose problem?
Air entering through a leak or a low coolant level can cause gurgling, but the sound does not identify this hose specifically.

Should other components be checked?
Yes. Examine the clamps, connectors and surrounding cooling components for deterioration or additional leakage.

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

99710683131

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