# 838738 Tube | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta tube for the run between the heat exchanger and the circulation pump, weighing 0.07 kg and listed for 7 applications across TMD, AD, TAMD and MD series engines. It is one of a pair of near-identical tubes in this group.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TMD31A
-   Volvo Penta TMD31B
-   Volvo Penta AD31
-   Volvo Penta AD31B
-   Volvo Penta TAMD31A
-   Volvo Penta TAMD31B
-   Volvo Penta MD31A

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

## ⚙️ Key Features

-   Heat exchanger to circulation pump
-   0.07 kg
-   7 applications across TMD, AD, TAMD and MD engines

## 🔌 Function

Carries coolant between the heat exchanger and the circulation pump as part of the closed fresh water circuit.

## ⚠️ Common Signs of Failure

-   Slow coolant loss that only shows when hot and under pressure
-   White or green coolant salt crust at the joints
-   Corrosion pitting or a thinned tube wall
-   Rubbing damage where the tube passes a bracket or hose clip
-   Running hot because the bore is silted up

## 🛠️ Service Notes

-   Tube 838737 at 0.073 kg covers 9 applications and looks the same in the listing — 3 grams is no guide, so order against your engine
-   Renew the sealing rings at both ends and pressure test before returning the boat to service

## 📦 Condition

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

## Details

- **Price:** 44.07 AUD
- **Vendor:** Volvo Penta
- **Type:** Hoses & Pipes
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 44.07 AUD | In stock |

## Images

- 838738 Tube | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/838738-tube-genuine-volvo-penta)
> Updated: 2026-10-11