# 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

## Details

- **Price:** 22.1 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 22.10 AUD | In stock |

## Images

- 20412762 O-Ring | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20412762-o-ring-genuine-volvo-penta)
> Updated: 2026-07-29