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- 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
Water Hose, Return.
The Genuine Porsche Water Hose, Return 98710622230 is an original replacement coolant hose for selected Porsche 987.2 Boxster and Cayman models.
Fits:
Diagram Ref No 30
Located within the engine cooling circuit around the thermostat housing and coolant Y-piece assembly, this hose forms part of the coolant return path and helps maintain continuous circulation through the engine's water-cooling system.
The cooling system operates under both elevated temperature and pressure. The return hose must therefore remain flexible, securely connected and completely leak-free while repeatedly being exposed to hot coolant, engine movement and thermal cycling.
As the hose ages, its rubber material can harden, swell, crack or weaken. Connections may also deteriorate and begin leaking. Even a relatively small coolant leak can gradually reduce the coolant level and ultimately cause overheating if ignored.
Replacing a deteriorated return hose helps restore cooling-system integrity, maintain correct coolant circulation and protect the engine against excessive operating temperatures.
What This Product Does:
The return water hose carries engine coolant through the return side of the cooling circuit around the thermostat and coolant-distribution system.
Its main functions are to:
- Carry coolant through the engine cooling circuit.
- Maintain the return path of the coolant system.
- Help regulate engine operating temperature.
- Maintain a sealed and pressurised cooling system.
- Connect components around the thermostat and Y-piece assembly.
- Accommodate engine movement and vibration.
- Prevent coolant loss.
- Support consistent coolant circulation.
Symptoms Of Wear Or Failure:
Common symptoms can include:
- Visible coolant leakage.
- Coolant residue around the hose.
- Gradual coolant-level loss.
- Low-coolant warning.
- Sweet coolant smell.
- Dampness underneath the vehicle.
- Coolant collecting around engine components.
- Engine running hotter than normal.
- Overheating.
- Cracked hose rubber.
- Swollen hose sections.
- Hardened or brittle rubber.
- Soft or spongy hose material.
- Leakage around hose connections.
- Steam from the engine area.
Why Replacement Matters:
Replacing a deteriorated Water Return Hose helps restore:
- Correct coolant circulation.
- Cooling-system pressure integrity.
- Reliable sealing.
- Stable engine temperature.
- Correct coolant level.
- Protection against overheating.
- Long-term cooling-system reliability.
A relatively inexpensive hose can prevent significantly more expensive engine damage if deterioration is identified early.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98710622230
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