# 838971 Coolant Pipe | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta coolant pipe for the run between the sea water pump and the oil cooler, listed for product number 868242, weighing 0.789 kg and covering 16 applications across TMD, AD, MD and TAMD series engines. It supersedes part number 846944.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TMD40B
-   Volvo Penta TMD40C
-   Volvo Penta AD41B
-   Volvo Penta TMD31A
-   Volvo Penta TMD31B
-   Volvo Penta TMD41A
-   Volvo Penta TMD41B
-   Volvo Penta MD30A
-   Volvo Penta TMD30A
-   Volvo Penta AD31
-   Volvo Penta AD31B
-   Volvo Penta TAMD41B
-   Volvo Penta TAMD41A
-   Volvo Penta TAMD31A
-   Volvo Penta TAMD31B
-   Volvo Penta MD31A

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

## ⚙️ Key Features

-   Sea water pump to oil cooler
-   For product number 868242
-   0.789 kg
-   Supersedes 846944
-   16 applications across TMD, AD, MD and TAMD engines

## 🔌 Function

Carries raw sea water from the pump to the oil cooler, the first leg of the raw water circuit downstream of the pump.

## ⚠️ Common Signs of Failure

-   Sea water weeping or dripping from the pipe or its unions
-   Salt crust building along the pipe and at the joints
-   Pipe wall pitted, wasted or holed by corrosion
-   Overheating as the bore silts or scales up
-   Impeller debris found lodged in the pipe after a pump failure

## 🛠️ Service Notes

-   Check the product number on your engine plate matches before ordering — this pipe is listed for product number 868242
-   Look for impeller fragments in the pipe if the sea water pump has shed vanes, and renew the seals at both ends
-   Coolant pipe 838973 at 0.703 kg covers the strainer to oil cooler leg on a different product list

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   838971 → Supersedes 846944

### OEM / Related Numbers

-   846944 earlier number superseded by this part

## 📦 Condition

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

## Details

- **Price:** 524.79 AUD
- **Vendor:** Volvo Penta
- **Type:** Hoses & Pipes
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 524.79 AUD | In stock |

## Images

- 838971 Coolant Pipe | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/838971-coolant-pipe-genuine-volvo-penta)
> Updated: 2026-09-21