# 24422740 Expansion Tank | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta expansion tank from the Cooling System group, weighing 0.991 kg. It supersedes 20845189, whose cost record lists 17 applications across TD and TAD series engines.

## ⚙️ Key Features

-   0.991 kg
-   Supersedes 20845189
-   17 applications across TD and TAD series engines
-   Also supersedes Volvo part number 20412283

## 🔌 Function

Holds the coolant that expands out of the circuit as the engine warms, and returns it on cooling.

## ⚠️ Common Signs of Failure

-   Coolant loss with no obvious external leak
-   Cracking or crazing of the tank body
-   Cap not holding the system pressure
-   Level swinging widely between hot and cold
-   Staining around the seams

## 🛠️ Service Notes

-   Check the cap as well as the tank — a cap that will not hold pressure produces the same symptoms
-   Only fill to the marked cold level; overfilling pushes coolant out as the engine warms

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   24422740 → Supersedes 20845189 → Supersedes 20531428

### OEM / Related Numbers

-   20845189 earlier number superseded by this part
-   20531427 earlier number superseded by this part
-   20531428 earlier number superseded by this part

## 📦 Condition

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

## Details

- **Price:** 1186.91 AUD
- **Vendor:** Volvo Penta
- **Type:** Cooling System
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 1186.91 AUD | In stock |

## Images

- 24422740 Expansion Tank | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/24422740-expansion-tank-genuine-volvo-penta)
> Updated: 2026-10-12