20420227 Return Line | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta turbocharger oil drain line used on the TAD520VE high-mounted turbo arrangement. It carries oil away from the turbo bearing housing and connects with companion return line 20460228.

🚤 Compatibility

Typically suits:

• Volvo Penta TD520VE
• Volvo Penta TAD520VE

• Engine Family: TD, TAD

⚙️ Key Features

• Rigid gravity-drain turbo oil line
• Confirmed for the TAD520VE high-mounted turbocharger
• Used with turbocharger 20460374
• Works with return line 20460228
• Requires unrestricted downhill routing and correct seals
• Engine type: Volvo Penta 5-litre turbocharged industrial diesel

🔌 Function

Returns lubricating oil from the turbocharger bearing housing to the engine by gravity.

⚠️ Common Signs of Failure

• Oil leakage around the drain
• Blue exhaust smoke from oil backing up in the turbo
• Restricted or kinked return line
• Cracked line from vibration
• Turbocharger seal failure caused by poor drainage

🛠️ Service Notes

• Renew the sealing washers, O-rings or gaskets at each end rather than reusing them, and check the union faces are clean and unmarked
• Fit the line without pulling it into place; a return line that has to be strained to line up will crack or chafe through in service
• Keep the original routing, clips and protective sleeving so the line stays clear of hot and moving parts and cannot rub
• Do not kink a line, and do not straighten and re-bend a formed metal one — cap the open ends while the system is apart so no dirt gets in
• Tighten the unions to the figures given in the workshop manual for your engine, then run up and check both ends for weeps before closing the access

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 20460374 - related turbocharger
• 20460228 - companion return line
• 20405790 - related gaskets
• 20405970 - related gaskets
• 20405822 - O-rings
• 20405789 - retainer

OEM Reman Alternatives

• 3802181 - exchange turbocharger

📦 Condition

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