21455938 Return Line | Genuine Volvo Penta Part

🔧 Product Description

A rigid turbocharger oil-drain line used on Volvo Penta TAD550GE industrial engines.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD550GE
• Volvo Penta TAD551GE

• Engine Family: TAD

⚙️ Key Features

• Gravity-drain turbocharger oil line
• Correct TAD550GE routing and flange geometry
• Designed for hot engine oil
• Maintains unrestricted oil return to the crankcase
• Uses dedicated flange, gasket and O-ring components

🔌 Function

The line returns lubricating oil from the turbocharger bearing housing to the engine crankcase.

⚠️ Common Signs of Failure

• Oil leaking around the turbocharger
• Restricted or kinked return line
• Turbocharger oil passing into the intake or exhaust
• Damaged flange
• Hardened or leaking seals
• Excessive turbocharger oil consumption

🛠️ 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 Supersession Chain

• 21455938 → Supersedes 21156240

OEM / Related Numbers

• 21156240 earlier number superseded by this part
• 3801449 - Related turbochargers
• 22600389 - Related turbochargers
• 21027478 - Connection flange
• 21027485 - Gasket
• 20459172 - O-ring

OEM Reman Alternatives

• 3801644 - Related remanufactured turbocharger

📦 Condition

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