# 858639 Insert | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta cooling system insert weighing 2.948 kg and listed for 4 applications across AQAD, MD, TAMD and TMD series engines. It supersedes 838909. Two other inserts appear in this run - 858134 at 2.404 kg and 858833 at 9.752 kg - and all three carry published weights, so this one sits in the middle; they are separate parts rather than a graded range, so match the fitment.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta AQAD30A
-   Volvo Penta MD30A
-   Volvo Penta TAMD30A
-   Volvo Penta TMD30A

-   **Engine Family:** AQAD, MD, TAMD, TMD

## ⚙️ Key Features

-   Supersedes 838909
-   2.948 kg
-   4 applications across four engine series
-   Distinct from inserts 858134 and 858833

## 🔌 Function

Forms the removable internal element inside its cooling system housing, and is renewed on its own rather than replacing the whole assembly.

## ⚠️ Common Signs of Failure

-   Coolant temperature climbing while the circuit stays full
-   Coolant and oil or raw water mixing
-   Scale, silt or debris packed into the passages
-   Corrosion pinholes or split tubes found on strip-down
-   Sealing ends distorted so the insert will not seat

## 🛠️ Service Notes

-   Renew the end seals and gaskets whenever the insert is disturbed
-   Flush the housing and check the anode before fitting a new insert

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   858639 → Supersedes 838909 → Supersedes 846056

### OEM / Related Numbers

-   838909 earlier number superseded by this part
-   846056 earlier number superseded by this part

## 📦 Condition

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

## Details

- **Price:** 4589.06 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 4589.06 AUD | In stock |

## Images

- 858639 Insert | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/858639-insert-genuine-volvo-penta)
> Updated: 2026-08-22