21165444 Return Line | Genuine Volvo Penta Part

🔧 Product Description

A large-bore gravity drain pipe that returns oil from the TAD650VE turbocharger bearing housing to the crankcase. Its bore and uninterrupted downward routing prevent oil from backing up behind the turbocharger seals.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD650VE
• Volvo Penta TAD660VE

• Engine Family: TAD

⚙️ Key Features

• TAD650VE turbocharger gravity-drain line
• Current replacement for return line 21165433
• Large unrestricted bore limits bearing-housing pressure
• Heat-resistant formed construction
• Flange and crankcase ends align without forcing
• Engine type: D6/D7E-family turbocharged industrial diesel

🔌 Function

Returns used turbocharger bearing oil to the sump with minimal back-pressure.

⚠️ Common Signs of Failure

• Loss of alignment or retention
• Abnormal noise, vibration or movement
• Leakage or damage at adjoining parts

🛠️ 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

• 21165444 → Supersedes 21165433 → Supersedes 21088645 → Supersedes 20838248

OEM / Related Numbers

• 21165433 earlier number superseded by this part
• 21088645 earlier number superseded by this part
• 21088611 earlier number superseded by this part
• 20838248 earlier number superseded by this part

📦 Condition

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