# 21711728 Piston Ring Kit | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta Late D4 / D6 Standard Piston Ring Kit - From SN A180871 - Part Number: 21711728

  

A genuine Volvo Penta standard-size piston ring set for one piston in later D4 and D6 marine diesels. The late version is identified by the 3.00mm oil-control ring and the published engine serial break.

  

Kit Contents:

  

• 1 x top compression ring - supplied within Volvo Penta kit 21711728

• 1 x second compression ring - supplied within Volvo Penta kit 21711728

• 1 x 3.00mm oil-control ring assembly - supplied within Volvo Penta kit 21711728

• One kit services one piston; four kits are required for a complete D4 and six kits for a complete D6

  

⚙️ Key Features

  

• Genuine Volvo Penta standard-size ring set

• Late 3.00mm oil-control ring design

• Published application from engine SN A180871

• Used across later D4 and D6 piston families

• Multiple marine aftermarket equivalents available

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 21711728 late-production piston-ring kit from SN A180871 where specified

  

OEM / Related Numbers:

  

• 21711728

• Late D4 / D6 piston and liner components selected by engine serial number

  

Aftermarket / Verified Equivalents:

  

• Crom Marine: 111459

• Swedish Lorry Parts: PRK-1728

• Recmar: REC21711728

• Marine Spare Parts: AM21711728

  

🚤 Compatibility

  

Commonly used on:

  

• D4 / D6 piston overhaul

• One-cylinder ring replacement

• Cylinder-liner and piston service

  

Typically suits:

  

• Engine models / drive models:

• Later D4-180 / 210 / 225 / 240 / 260 applications using the 3.00mm oil ring

• Later D6-280 / 310 / 330 / 350 / 370 applications using the 3.00mm oil ring

  

• HP Range: Approximately 180HP - 370HP

• Engine Type: Volvo Penta D4 / D6 common-rail marine diesel

• Year Range: Late production within the applicable D4 / D6 generations

• Serial Range: From engine SN A180871 where specified; piston version and standard bore must also be confirmed

  

🔌 Function

  

The rings contain combustion pressure, control the cylinder-wall oil film and transfer heat from the piston into the liner.

  

Common signs replacement or overhaul is required:

  

• Excessive crankcase blow-by

• High oil consumption or blue smoke

• Low cylinder compression

• Piston or liner is being renewed

• Oil ring thickness confirms the late 3.00mm version

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 402.44 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 402.44 AUD | In stock |

## Images

- 21711728 Piston Ring Kit | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21711728-piston-ring-kit-genuine-volvo-penta)
> Updated: 2026-07-30