Water coolant hose. Porsche 955 / 957 Cayenne

Water Coolant Hose – Essential for Reliable Cooling System Performance

This water coolant hose s designed for the Porsche 955 and 957 models, forming a critical part of the engine’s cooling circuit. It transports coolant to and from the engine and radiators, ensuring proper heat dissipation and stable operating temperatures—vital for high-performance V8 engines.

Fits:

• Porsche 955 Cayenne 3.2L V6 2003-06
• Porsche 955 Cayenne S 4.5L V8 2003-06
• Porsche 955 Cayenne Turbo 4.5L 2003-06
• Porsche 955 Cayenne Turbo S 4.5L 2006>>
• Porsche 957 Cayenne 3.6L 2007-10
• Porsche 957 Cayenne S/GTS 4.8L 2007-10
• Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10

Diagram ref no 29

With age and heat cycles, coolant hoses can weaken, crack or develop internal swelling. A compromised hose may cause coolant leaks, overheating, reduced engine performance or complete cooling system failure. Replacing a worn hose with a high-quality alternative ensures the V8 Cayenne continues to run cool, efficient and trouble-free.

What This Coolant Hose Does

This specialised coolant hose:

• Transfers coolant between key cooling components
• Maintains optimal engine temperature under load
• Helps prevent overheating during towing or spirited driving
• Supports proper coolant circulation in V8 Cayenne engines
• Seals securely to avoid leaks and pressure loss

A healthy coolant hose is essential for maintaining engine reliability, especially in high-output S, GTS and Turbo variants.

Why Coolant Hoses Fail on Porsche Cayenne V8 Engines

Typical issues include:

• Heat-induced rubber degradation from repeated thermal cycles
  
• Cracking or splitting caused by age and vibration
  
• Internal hose collapse, restricting coolant flow
  
• Coolant contamination, accelerating material breakdown
  
• Pressure spikes from failing thermostats or caps
  
• Exposure to oil, which weakens hose material

Symptoms of failure may include coolant smells, visible drips, overheating warnings, or low coolant levels.

Why You Should Replace a Faulty Coolant Hose

Replacing a worn coolant hose provides:

• Restored coolant pressure and circulation efficiency
• Prevention of leaks and overheating
• Protection of sensitive engine components
• Reduced risk of roadside breakdowns
• Improved long-term reliability for engines

Given the high engine bay temperatures in Cayenne, S, GTS and Turbo models, replacing hoses proactively is a smart preventative step.

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

95510607300

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