# 21252233 Piston Ring Kit | Genuine Volvo Penta Part

## 🔧 Product Description

A genuine Volvo Penta standard-size piston-ring kit for one 101mm-bore Deutz-derived D4D / D6H engine piston. The three-ring pack restores combustion sealing, oil control and heat transfer for one cylinder. Four kits are required for a four-cylinder D4D / TAD420 engine and six kits for a six-cylinder TAD650 / D6H engine. Ring widths are approximately 2.5mm top, 2.0mm second and 3.0mm oil-control.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TD420VE
-   Volvo Penta TAD650VE
-   Volvo Penta TAD420VE

-   **Engine Family:** TD, TAD
-   **HP Range:** Approximately 100-220 HP
-   **Year Range:** Approximately 2000s - 2010s
-   **Serial Range:** SN10642781-

## ⚙️ Key Features

-   Genuine Volvo Penta standard 101mm piston-ring set
-   Three-ring pack for one piston
-   Approximate ring widths 2.5mm / 2.0mm / 3.0mm
-   Four kits for four-cylinder engines; six for six-cylinder engines
-   Engine type: Volvo Penta 4- or 6-cylinder Deutz-derived turbocharged industrial diesel
-   4 used per assembly

## 📋 Kit Contents

-   21252233 top compression ring - 1
-   21252233 second compression / scraper ring - 1
-   21252233 oil-control ring assembly - 1
-   21252233 complete standard-size ring pack for one 101mm piston - 1 set
-   Volvo Penta does not assign separate service numbers to the individual rings; all are supplied under kit number 21252233
-   Piston, pin, clips and cylinder liner are not included

## 🔌 Function

The rings seal combustion pressure, scrape excess oil from the cylinder wall and transfer piston heat into the liner.

## ⚠️ Common Signs of Failure

-   Compression and engine power are low
-   Crankcase blow-by or oil consumption increases
-   Blue smoke or oily exhaust deposits are present
-   Rings are broken, worn or carbon-stuck
-   Cylinder bore and piston ring-groove clearances exceed specification

## 🛠️ Service Notes

-   Check the end gap of each ring in the bore it will run in and compare it with the figure in the workshop manual for your engine; a worn or rebored cylinder changes it
-   Fit the rings the right way up — where a face is marked or the section is stepped, that face goes towards the piston crown, and an oil control ring's expander must be fitted without overlapping its own ends
-   Use a ring expander rather than levering rings on with a screwdriver, and open them only as far as they need to go; cast rings snap and the groove edges nick easily
-   Stagger the ring gaps round the piston as the manual for your engine directs, so that no two gaps line up
-   Oil the rings, bore and compressor lightly, enter the bore with a ring compressor, and never force the piston in — if it resists, back it out and find out why

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   21252233 → Supersedes 20482739

### OEM / Related Numbers

-   20850056 earlier number superseded by this part
-   20482739 earlier number superseded by this part
-   21797646 related reference
-   Volvo Penta D4D / D6H piston and 101mm cylinder-liner components

### Other-Brand OEM Numbers

-   Kolbenschmidt: 800057310000
-   MAHLE: 099 RS 00137 0N0 / 10191N0 - verify piston revision
-   Mahle: 10191N0
-   Goetze Engine: 08-127900-00

### Aftermarket / Verified Equivalents

-   NE: 120015005900
-   Sync Parts: 01-1422
-   VolvoKits: PRK-739

## 📦 Condition

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

## Details

- **Price:** 212.29 AUD
- **Vendor:** Volvo Penta
- **Type:** Engine Components
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 212.29 AUD | In stock |

## Images

- 21252233 Piston Ring Kit | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21252233-piston-ring-kit-genuine-volvo-penta)
> Updated: 2026-09-18