22911691 Expansion Tank | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta expansion tank from the Cooling System group, weighing 11.3 kg and superseding part number 864609, whose eight TAMD series applications it covers. The tank accommodates coolant expansion, so cracks or a failed cap affect system pressure.

⚙️ Key Features

• Expansion tank from the Cooling System group
• 11.3 kg
• Supersedes 864609 and covers its eight TAMD series applications

🔌 Function

Holds the coolant that expands as the engine warms and returns it as it cools, keeping the circuit full and setting the system pressure through its cap.

⚠️ Common Signs of Failure

• Coolant level dropping with no obvious external leak
• Coolant pushed out of the overflow after shutdown
• Overheating or coolant boiling where the cap no longer holds pressure
• Tank found cracked at a seam or around a stub on inspection
• Cap seal perished, or the filler neck corroded and pitted

🛠️ Service Notes

• Test or renew the pressure cap with the tank - a cap that will not hold pressure produces the same symptoms as a cracked tank
• Check the hoses and stubs while the tank is off, and flush the system if the old coolant is dirty

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 22911691 → Supersedes 864609 → Supersedes 862705

OEM / Related Numbers

• 864609 earlier number superseded by this part
• 862705 earlier number superseded by this part

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging