Coolant Hose - Expansion Tank To Bleeder Valve. Porsche 718 (982) Boxster & Cayman 2.0L / 2.5L 2017>>  ❭  982121637A

Coolant Hose - Expansion Tank To Bleeder Valve.
Ensure proper cooling system ventilation and coolant circulation with the Coolant Hose – Expansion Tank to Bleeder Valve. This OE MATCH hose connects the expansion tank to the bleeder valve, allowing trapped air to escape and helping maintain correct system pressure during engine operation.

Fits:

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Diagram Ref No 5

What This Product Does:

• Allows trapped air to escape during coolant circulation
• Helps prevent air pockets in the cooling system
• Supports stable coolant pressure regulation
• Maintains consistent engine operating temperature
• Promotes efficient coolant flow throughout the system

Symptoms Of Wear Or Failure:

• Coolant leaks near the expansion tank or bleeder valve connection
  
• Low coolant warning light or frequent coolant top-offs
  
• Sweet coolant smell from the engine bay
  
• Coolant residue or staining around hose fittings
  
• Cracks, splits, or brittle hose material
• Air trapped in the cooling system, causing gurgling sounds
  
• Fluctuating engine temperature or inconsistent temperature gauge readings
  
• Overheating, especially after coolant service or refilling
  
• Steam from under the hood in severe cases
  
  

Why Replacement Matters:

• This hose plays a key role in allowing the cooling system to properly vent air and maintain stable pressure. If it becomes cracked, brittle, or blocked, air can remain trapped in the system, leading to inconsistent coolant circulation and temperature fluctuations.
• Failure to replace a worn hose may result in coolant leaks, pressure imbalance, overheating, and reduced cooling efficiency. Air pockets in the system can also place additional strain on other cooling components.
• Replacing the hose helps ensure proper system bleeding, prevents leaks, and protects the engine by maintaining reliable temperature control and cooling system performance.

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Related, superseded, cross reference or alternative numbers for comparison.

982121637A

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