Water Line Supply, Coolant Pipe. Porsche 987 Boxster / Cayman Tiptronic 2007-08  ❭  98630707623

Water Line Supply, Coolant Pipe.

The Porsche Water Line Supply, Coolant Pipe 98630707622 is a genuine Porsche coolant supply line used within the Tiptronic automatic-transmission cooling circuit on selected Porsche Boxster and Cayman applications.

Fits:

• Porsche Boxster 987 2.7L 2007/08
• Porsche Boxster 987 S 3.2/3.4L 2007/08
• Porsche Cayman 2.7L 987C 2007-08
• Porsche Cayman S 3.4L 987C 2007-08  

Diagram Ref No 6

The pipe carries engine coolant to the automatic transmission fluid cooler, where coolant helps regulate the operating temperature of the transmission oil.

Maintaining this pipe in good condition is important because the Tiptronic transmission relies on effective thermal management to keep transmission-fluid temperatures within the correct operating range.

As a Genuine Porsche component, the pipe provides the correct factory dimensions, routing and connections for the intended installation.

What This Product Does:
The coolant supply line forms part of the water-to-oil cooling circuit for the Tiptronic transmission.

Its primary functions include:

• Carrying engine coolant to the ATF cooler
• Supporting regulation of automatic-transmission fluid temperature
• Maintaining coolant circulation through the transmission cooler
• Helping prevent excessive transmission-fluid temperatures
• Maintaining a sealed cooling circuit
• Supporting correct Tiptronic transmission operation
• Providing the original factory coolant routing
• Preventing coolant loss when correctly installed and sealed

The pipe works alongside the ATF cooler, coolant return line, transmission oil supply and return lines, hoses and associated valves.

Symptoms Of Wear Or Failure:
Coolant pipes can deteriorate through age, corrosion, vibration and repeated heating and cooling cycles.

Common signs of a failing coolant supply pipe include:

• Visible coolant leakage
• Wetness around the pipe or connections
• Pink or white dried coolant deposits
• Falling engine coolant level
• Frequent need to top up coolant
• Low coolant warning
• Sweet coolant smell
• Corrosion or pitting on the pipe
• Damaged pipe connections
• Leakage around seals or hose joints
• Distorted or bent pipework
• Loss of cooling-system pressure
• Higher transmission operating temperatures
• Transmission overheating warnings in severe cases

Small leaks may only become visible once the vehicle is fully warm and the cooling system is pressurised.

Why Replacement Matters:
A leaking coolant supply line can affect both the engine cooling system and the transmission cooling circuit.

Coolant loss can reduce system pressure and circulation, while insufficient coolant flow through the ATF cooler can reduce its ability to control transmission-fluid temperature.

Continued operation with a damaged line can contribute to:

• Coolant loss
• Cooling-system pressure loss
• Reduced ATF cooling efficiency
• Elevated transmission-fluid temperature
• Accelerated transmission-fluid deterioration
• Increased wear within the automatic transmission
• Engine overheating if coolant loss becomes significant
• Roadside breakdown

Replacing the damaged pipe helps restore a sealed cooling circuit and reliable coolant flow through the transmission cooler.

Related reference numbers
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98630707623

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