21665580 Breather Pipe | Genuine Volvo Penta Part

🔧 Product Description

A genuine formed breather pipe used in the closed crankcase-ventilation system on Volvo Penta generator-drive engines. It routes crankcase vapour from the engine to the oil separator while maintaining the designed slope, bore and connection alignment.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD550GE
• Volvo Penta TAD551GE
• Volvo Penta TAD750GE
• Volvo Penta TAD751GE

• Engine Family: TAD
• Year Range: Approximately 2008 - 2020

⚙️ Key Features

• Genuine Volvo Penta crankcase-ventilation pipe
• Factory bend and connection geometry
• Resistant to hot oil mist and crankcase vapour
• Works with the specified oil separator and drain system
• Direct replacement for a cracked, restricted or leaking original pipe
• Engine type: 5.1L inline four-cylinder or 7.15L inline six-cylinder turbocharged generator diesel

🔌 Function

Routes crankcase vapour from the engine to the oil separator, allowing oil mist to be separated and crankcase pressure to remain controlled.

⚠️ Common Signs of Failure

• Oil mist leakage
• Excess crankcase pressure
• Oil residue around the pipe joints
• Internal sludge restriction
• Cracking or vibration fatigue

🛠️ Service Notes

• Route the new pipe exactly as the original ran, with no kinks and no sagging low point where oil or condensate can collect and block the flow
• Support the pipe with its original clips and keep it clear of hot surfaces and moving parts; a chafed or melted breather puts oil mist into the engine space
• Make sure both connections are clean, sealed and clamped — a leaking breather makes an oily mess and upsets crankcase pressure
• Clean out the breather housing, hose stub or oil separator while the pipe is off; blocked crankcase ventilation pressurises the crankcase and pushes oil past seals and the dipstick
• Check the joints again after the first run at temperature, when the pipe is soft and connections can settle

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 20930510 - oil separator
• 21038626 - separator gasket
• 21012774 - oil lines
• 22253980 - oil lines
• 22393475 - oil lines
• 21496705 - drain pipe
• 20971632 - ventilation hose

📦 Condition

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