# 20798056 Plug | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine service component used in the tad550/tad750 cylinder-block service opening. It restores the original Volvo Penta dimensions, fit and operating relationship.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TAD560VE
-   Volvo Penta TAD561VE
-   Volvo Penta TAD650VE
-   Volvo Penta TAD660VE
-   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
-   **HP Range:** Approximately 300 HP
-   **Year Range:** Approximately 2000s-2010s

## ⚙️ Key Features

-   Plug for a cylinder-block service opening
-   0.026 kg
-   12 applications across TAD-series engines
-   Supersedes 20890988, catalogued earlier as a cap plug
-   Fitted using locking fluid 1161075

## 🔌 Function

Closes a machining or service opening in the cylinder block so oil or coolant cannot escape from the passage behind it.

## ⚠️ Common Signs of Failure

-   A weep or drip from a blanked opening on the block rather than from a gasket
-   Oil or coolant loss with the level dropping and no obvious source
-   Plug found loose or partly backed out
-   Thread corroded or damaged in the block
-   Sealing face fretted where the plug has been working

## 🛠️ Service Notes

-   Use locking fluid 1161075 on the thread as specified - a plug fitted dry in this position can work loose
-   Clean and degrease both threads before applying the locking fluid
-   Supersedes 20890988

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   20798056 → Supersedes 20890988

### OEM / Related Numbers

-   20890988 earlier number superseded by this part
-   21270300 cylinder block
-   20860579 retaining screw
-   20858657; 20858674; 20858666 bushings
-   11700279; 20460024; 20405721; 20405716; 20405722 plugs
-   21685022 sealant
-   20799589 cap plug
-   20793619 nozzle
-   20459981 gasket
-   20412359 O-ring
-   24426064 cover
-   20441859 filling plug

## 📦 Condition

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

## Details

- **Price:** 14.74 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 14.74 AUD | In stock |

## Images

- 20798056 Plug | Genuine Volvo Penta Part

---

> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20798056-plug-genuine-volvo-penta)
> Updated: 2026-10-10