# 420589 Expansion Plug | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta expansion plug, 33 mm in diameter, weighing 0.0045 kg and listed for 25 applications across the TWD, TID, TD and TAD series engines.

## 🚤 Compatibility

-   **Engine Family:** TWD, TID, TD, TAD

Full model list at the end of this description.

## ⚙️ Key Features

-   33 mm diameter
-   0.0045 kg
-   25 applications across the TWD, TID, TD and TAD series
-   33mm (Volvo assembly listing)

## 🔌 Function

Closes a cored passage in the casting, expanding into the bore to seal it.

## ⚠️ Common Signs of Failure

-   Coolant weeping or crusting from a plug in the block face
-   Plug bowed outwards or pushed proud of its bore
-   Plug corroded, thin or perforated
-   Rust staining running down the casting below the plug

## 🛠️ Service Notes

-   Order on the 33 mm diameter — expansion plugs come in a graded range and the bore size is the only thing that matters
-   Clean the bore back to sound metal and set the plug to the depth the manual specifies

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta TD61A, TD61ACE, TD61AG, TD61AP, TD61AW
-   Volvo Penta TWD610G, TWD610P, TWD610PB, TWD610V
-   Volvo Penta TD630ME, TD630VE
-   Volvo Penta TWD630ME, TWD630VE
-   Volvo Penta TWD740GE, TWD740VE
-   Volvo Penta TAD740GE
-   Volvo Penta TAD741GE
-   Volvo Penta TD610G
-   Volvo Penta TD640VE
-   Volvo Penta TD71A
-   Volvo Penta TD730VE
-   Volvo Penta TID61AG
-   Volvo Penta TID71A
-   Volvo Penta TWD710V
-   Volvo Penta TWD731VE

## Details

- **Price:** 9.64 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 9.64 AUD | In stock |

## Images

- 420589 Expansion Plug | Genuine Volvo Penta Part

---

> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/420589-expansion-plug-genuine-volvo-penta)
> Updated: 2026-10-10