20405630 Breather Pipe | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta rigid breather pipe used in TD520GE Stage 1 / Tier 1 crankcase-ventilation systems with or without the factory air cleaner.

🚤 Compatibility

Typically suits:

• Volvo Penta TD520GE
• Volvo Penta TAD520GE
• Volvo Penta TAD520VE

• Engine Family: TD, TAD

⚙️ Key Features

• Factory-formed TD520GE breather pipe
• Used with oil separator, coupling and breather hose
• Supported by the original bracket and flange nut
• Confirmed on with-air-filter and without-air-filter arrangements
• Maintains correct vapour routing and drainage
• Engine type: Volvo Penta 5-litre industrial diesel

🔌 Function

Routes crankcase gas from the oil separator to the assigned intake or vent connection.

⚠️ Common Signs of Failure

• Oil leakage or mist around the pipe
• Cracked or fatigued pipe
• Loose support bracket
• Blocked breather flow
• Hose or clamp repeatedly loosening

🛠️ 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 Supersession Chain

• 20405630 → Supersedes 20460388

OEM / Related Numbers

• 20460388 earlier number superseded by this part
• 20405626 - oil separator
• 20405625 - conduit coupling
• 20405629 - hose
• 20405755 - hose clamps
• 20405930 - manifold for air-filter installation

📦 Condition

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