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Porsche // Panamera 971 MK1 (2017-2020) // 971.1 Panamera 4S Diesel 4.0L Twin-Turbo V8 Sport Turismo 2017-18
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- Porsche 996 C4 3.6L 09/01-2005
OE Match coolant return hose for the Porsche 996 C4 3.6L with MANUAL transmission. Reference 99610688808 replaces the earlier references 99610688802 and 99610688806.
Fits
- Porsche 996 C4 3.6L 2002>> MANUAL
Check fitment for your specific vehicle (model, year, engine) before ordering.
Diagram ref no 3
What This Product Does
This hose forms part of the coolant return circuit. It carries returning coolant through the cooling system, contributing to the circulation needed to manage engine temperature.
Functions
- Provides a passage for returning coolant.
- Connects the relevant sections of cooling-system pipework.
- Accommodates movement between connected components.
Technical Details
- Brand: OE Match.
- Current reference: 99610688808.
- Application specified for the 3.6L C4 with MANUAL transmission.
Symptoms of Fault
- Coolant odour near the engine.
- Repeated reduction in coolant level.
- Moisture or dried deposits at hose connections.
- Cracks, bulges or unusually soft hose sections.
- Seepage following engine shutdown.
- Gurgling or an increase in engine temperature.
These signs can also originate elsewhere in the cooling system. Establish the leak source before replacing the hose.
Why Replacement Matters
Repeated heating and cooling, vibration and fluid exposure can deteriorate a hose over time. Renewing a leaking or damaged return hose addresses coolant loss before it develops into a larger cooling problem. Inspect adjacent connectors, retaining clips and sealing surfaces during the repair, rather than assuming the hose is the only worn component.
OE Reference
- 99610688808: current reference.
- 99610688802 and 99610688806: superseded Porsche references.
FAQs
- How should a suspected leak be checked?
A cooling-system pressure test can help locate leakage around the hose and its connections. - Why might leakage appear only when hot?
Operating temperature and pressure can reveal deterioration that is not apparent when the system is cold. - Should the clamps and fittings be inspected too?
Yes. Worn connections or damaged fittings can cause continued leakage after hose replacement.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610688808
The product you are viewing cross references to these numbers