20412762 O-Ring | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta Cylinder Liner Lower Sealing O-Ring - Part Number: 20412762

Genuine Volvo Penta lower cylinder-liner O-ring used to seal wet liners into the cylinder block on D5 and D7 engines. Two O-rings are fitted per cylinder, giving eight on four-cylinder engines and twelve on six-cylinder engines.

⚙️ Key Features

• Wet-liner lower sealing O-ring

• Two used per cylinder

• Eight required on D5 four-cylinder engines and twelve on D7 six-cylinder engines

• Separates engine coolant from the crankcase

• Replace all liner seals during cylinder overhaul

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 20412762 - current Volvo Penta liner O-ring reference

OEM / Related Numbers:

• 3843536 / 3842448 - related cylinder-liner and piston kits where specified

• Cylinder liner and block bore references are engine-stage dependent

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• Volvo Penta D5 / D7 wet cylinder-liner assemblies

Typically suits:

• Engine / equipment models:

• TD520GE

• TAD520GE

• TAD530GE

• TAD531GE

• TAD532GE

• D5A-T

• D5A-TA

• D5A-B TA

• TD720GE

• TAD720GE

• TAD730GE

• TAD731GE

• TAD732GE

• TAD733GE

• D7A-T

• D7A-TA

• D7A-B TA

• D7C-TA

• D7C-B TA

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

• Year / Serial Range: Cylinder-liner kit and engine serial-number dependent

🔌 Function

Seals the lower wet-liner bore so coolant cannot enter the crankcase.

Common signs of failure:

• Coolant in the engine oil

• Oil level rising unexpectedly

• Coolant loss with no external leak

• O-ring cuts, hardening or extrusion

• Corrosion in the liner-seal bore

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging