20405791 Return Line | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta Turbocharger Upper Oil Return Line - Part Number: 20405791

Genuine Volvo Penta turbocharger oil-return line used directly beneath turbocharger 20405604 in the TD520GE Stage 1 / Tier 1 system. It connects to the lower return line and crankcase drain arrangement.

⚙️ Key Features

• Factory-formed upper turbo oil-drain pipe

• Confirmed specifically for TD520GE Stage 1 / Tier 1

• Works with early lower line 20405600 or later line 20555279

• Uses plane gasket 20405790 and related O-rings

• Maintains unrestricted gravity drainage

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 20405791 - current Volvo Penta upper return-line reference

OEM / Related Numbers:

• 20405604 - turbocharger

• 20405600 - early lower return line

• 20555279 - later lower return line

• 20405790 - plane gasket

• 20405822 - O-rings

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• Volvo Penta TD520GE turbocharger oil-return systems

Typically suits:

• Engine / equipment models:

• TD520GE - Stage 1 / Tier 1

• Engine Type: Volvo Penta 5-litre turbocharged industrial diesel

• Year / Serial Range: Turbo and lower-return-line serial configuration dependent

🔌 Function

Drains lubricating oil from the turbocharger bearing housing into the lower return line and crankcase.

Common signs of failure:

• Oil leakage around the drain pipe

• Blue smoke from restricted drainage

• Cracked or distorted pipe

• Blocked carboned passage

• Turbocharger seal leakage

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging