20405822 O-Ring | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta Turbocharger Oil Return O-Ring - Part Number: 20405822

Genuine Volvo Penta O-ring used in pairs at the turbocharger oil-return pipe connections. It seals rigid return lines including 20580172/20580170 and the TD520GE return-line assembly.

⚙️ Key Features

• Oil- and heat-resistant turbo drain O-ring

• Two used in the applicable return-line assembly

• Confirmed across D5/D7 low-mounted turbo arrangements

• Used with pipe retainer 20405789 where specified

• Should be replaced whenever the return pipes are separated

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 20405822 - current Volvo Penta turbo return O-ring reference

OEM / Related Numbers:

• 20580172 / 20580170 - related return lines

• 20405791 / 20405600 / 20555279 - TD520GE return-line references

• 20405789 - pipe retainer

• 20405790 - plane gasket

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• Volvo Penta D5/D7 turbocharger oil-return systems

Typically suits:

• Engine / equipment models:

• TD520GE

• TAD530GE

• TAD531GE

• TAD532GE

• TD720GE

• TAD730GE

• TAD731GE

• TAD732GE

• TAD733GE

• Engine Type: Volvo Penta 5- and 7-litre turbocharged industrial diesel

• Year / Serial Range: Turbocharger and return-pipe arrangement dependent

🔌 Function

Seals the turbocharger oil-return pipe joints while allowing unrestricted gravity drainage.

Common signs of failure:

• Oil leakage at a return-pipe joint

• O-ring hardening or flattening

• Blue smoke from oil backing up

• Pipe movement damaging the seal

• Leakage after turbocharger removal

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging