# 78637486 Coolant Pipe | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta coolant pipe weighing 0.851 kg and listed for 1 application on TWD series engines. It supersedes part number 78546572, alongside 78637478, 78637483, 78637492 and 78637495 in the same assembly, and is the heaviest of the five.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TWD1683VE

-   **Engine Family:** TWD

## ⚙️ Key Features

-   0.851 kg
-   1 application on the TWD series
-   Supersedes 78546572
-   Heaviest of the five parts replacing that old number

## 🔌 Function

Carries coolant between two points on the engine as a rigid, formed section of the cooling circuit.

## ⚠️ Common Signs of Failure

-   Coolant loss with staining at a joint or bend
-   Sweet coolant smell after running
-   Pinhole weeping rust and scale
-   Pipe dented where a clip or bracket bears
-   Corrosion blistering along the pipe wall

## 🛠️ Service Notes

-   Because five current parts all replace 78546572, confirm the part on the engine and order by the current number
-   Renew the O-rings or gaskets at each connection and check the pipe's brackets are sound

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   78637486 → Supersedes 78546572

## 📦 Condition

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

## Details

- **Price:** 460.65 AUD
- **Vendor:** Volvo Penta
- **Type:** Hoses & Pipes
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 460.65 AUD | In stock |

## Images

- 78637486 Coolant Pipe | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/78637486-coolant-pipe-genuine-volvo-penta)
> Updated: 2026-09-06