# 21108676 Sealing Ring | Genuine Volvo Penta Part

## 🔧 Product Description

Brand-new genuine Volvo Penta sealing ring for the common-rail fuel leak-off/return line on TAD5 and TAD7 engines. It seals the pipe union against diesel leakage and air entry and should be renewed whenever the joint is disturbed.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TAD550GE
-   Volvo Penta TAD551GE
-   Volvo Penta TAD560VE
-   Volvo Penta TAD561VE
-   Volvo Penta TAD734GE
-   Volvo Penta TAD750GE
-   Volvo Penta TAD751GE
-   Volvo Penta TAD752GE
-   Volvo Penta TAD753GE
-   Volvo Penta TAD754GE
-   Volvo Penta TAD765VE
-   Volvo Penta TAD764VE
-   Volvo Penta TAD763VE
-   Volvo Penta TAD762VE
-   Volvo Penta TAD761VE

-   **Engine Family:** TAD

## ⚙️ Key Features

-   Fuel-compatible seal for the injector leak-off circuit
-   Used with return/leak-off pipe 21156370 on applicable engines
-   Correct section for the machined fuel connection
-   Single-use service item
-   One sealing ring supplied
-   Engine type: Volvo Penta 5- and 7-litre common-rail industrial diesel
-   Quantity varies by assembly, most commonly four

## 🔌 Function

Seals the low-pressure injector return connection so fuel remains contained and the return circuit cannot draw air.

## ⚠️ Common Signs of Failure

-   Diesel wetness around the union
-   Fuel smell after shutdown
-   Hard starting after fuel-system work
-   Ring cut or flattened
-   Repeated leakage from a scratched sealing face

## 🛠️ Service Notes

-   Always fit a new sealing ring rather than reusing the old one — a ring that has been compressed once has taken a set and will not seal reliably a second time
-   Clean the groove or seat and check it for scoring, corrosion and old sealant before fitting; a mark across the sealing face will leak however good the ring is
-   Ease the ring into place without stretching, twisting or dragging it over sharp edges or threads, and check it is seated squarely all the way round before closing the joint
-   Do not add sealant or jointing compound unless the workshop manual for your engine calls for it, and tighten the joint or union to the figure given in that manual
-   Check the joint for weeping once the engine has been run up to temperature and allowed to cool, as many sealing rings only show a leak after a heat cycle

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   21108676 → Supersedes 21084189

### OEM / Related Numbers

-   21084189 earlier number superseded by this part
-   Earlier reference 21022796
-   Leak-off line 21156370

### Other-Brand OEM Numbers

-   VOE21108676

## 📦 Condition

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

## Details

- **Price:** 4.93 AUD
- **Vendor:** Volvo Penta
- **Type:** Gaskets & Seals
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 4.93 AUD | In stock |

## Images

- 21108676 Sealing Ring | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21108676-sealing-ring-genuine-volvo-penta)
> Updated: 2026-09-06