# 20798827 O-Ring | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta Injector O-Ring - Part Number: 20798827

  

OEM sealing component used in the common-rail injector installation and sealing. It restores the specified fluid-, air- or gas-tight interface when the adjoining parts are serviced.

  

⚙️ Key Features

  

• Calibrated common-rail injector/nozzle and control-valve assembly

• Maintains the specified opening, delivery and spray characteristics

• Supports clean combustion, cylinder balance and rated engine output

• Requires clean fuel, correct coding/calibration procedure and new sealing components

• Professional test-bench verification is recommended before reuse or overhaul

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 20798827 (OEM catalogue reference)

  

OEM / Related Numbers:

  

• 20798114 injector

• 3803977 exchange injector

• 20827892 injector claw

• 20798827 injector O-ring

• 20799064 injector sealing ring

• 20799719 injector retaining screw

  

Aftermarket / Verified Equivalents:

  

• Olsson Parts: 52005

  

🚤 Compatibility

  

Commonly used on:

  

• Common-rail injector installation and sealing

  

Typically suits:

  

• Engine models:

• TAD550GE; TAD551GE; TAD750GE; TAD750VE; TAD751GE; TAD752GE

• HP Range: Approximately 180-300 HP, depending on engine rating

• Engine Type: 5.7 L and 7 L common-rail diesel

• Year Range: Approximately 2000s-2010s

  

🔌 Function

  

Prevents leakage and contamination at the designated joint while maintaining the required separation between combustion gas, oil, coolant, fuel or intake air.

  

Common signs of failure:

  

• Hard starting, extended cranking or no-start

• Rough idle, misfire or cylinder imbalance

• Black, white or grey exhaust smoke

• Reduced power and increased fuel consumption

• Injector knock, excessive leak-off, poor spray pattern or calibration fault

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 23.5 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 23.50 AUD | In stock |

## Images

- 20798827 O-Ring | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20798827-o-ring-genuine-volvo-penta)
> Updated: 2026-08-01