# 21849858 Pipe | Genuine Volvo Penta Part

## 🔧 Product Description

Rigid coolant pipe in the D13B-E MG temperature-control system, used with the separately mounted 220-240 V, 2000 W engine-heater arrangement. It forms part of the coolant circulation path between heater hoses and the engine.

## 🚤 Compatibility

-   **Engine Family:** D

Full model list at the end of this description.

## ⚙️ Key Features

-   D13B-E MG temperature-control application
-   Engine-heater coolant routing
-   Rigid factory pipe geometry
-   Used with 2000 W heater option
-   Correct clamp and hose interface
-   Engine type: 13-litre marine-commercial diesel

## 🔌 Function

Carries coolant through the optional electric engine-heater circuit to promote reliable cold starting and reduce warm-up time.

## ⚠️ Common Signs of Failure

-   Coolant leakage at a pipe or hose joint
-   Corrosion or pinhole leakage
-   Restricted heater circulation
-   Cracked mounting point
-   Engine heater operates but coolant does not warm evenly

## 🛠️ Service Notes

-   Offer the pipe up and check it reaches both connections freely before you tighten anything — a rigid pipe pulled into place is a pipe left under permanent strain, and strained pipes crack at the fittings in service
-   Renew the sealing washers, O-rings or union seals that go with the pipe rather than reusing the old ones, and make sure the seats, faces and threads are clean
-   Keep the ends capped while you work and blow or flush a pipe through before fitting; anything left inside goes straight into the oil, fuel or coolant system
-   Tighten unions and banjo bolts evenly to the figures in the workshop manual for your engine — overtightening distorts the seat and starts the leak you were trying to cure
-   Refit every clip and support bracket in its original place and keep the pipe clear of hot or moving parts so it cannot chafe or be shaken to failure

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   21849858 → Supersedes 21593449

### OEM / Related Numbers

-   21593449 earlier number superseded by this part
-   21578298 (related engine heater)
-   22310451 (220-240 V, 2000 W heater)
-   943369 (related rubber hose)
-   994559 (related hose clamp)
-   21593140 (related pipe)
-   952631 (related clamps)
-   949786 (related clamps)

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta D13C3-B MH, D13C1-B MH, D13C4-B MH, D13B-E MG, D13B-E MG (FE), D13B-E MH, D13B-E MH (FE), D13B-F MG, D13B-F MG (FE), D13B-N MH, D13B-N MH (FE), D13C4-B MP, D13C5-B MP, D13C1-A MH, D13C2-A MH, D13C1-B MG, D13C3-B MG, D13C2-B MG, D13C4-B MG, D13C2-A MG, D13C1-A MG, D13C8-B MP

## Details

- **Price:** 586.14 AUD
- **Vendor:** Volvo Penta
- **Type:** Hoses & Pipes
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 586.14 AUD | In stock |

## Images

- 21849858 Pipe | Genuine Volvo Penta Part
- 21849858 Pipe | Genuine Volvo Penta Part - photo 2 of 2

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21849858-pipe-genuine-volvo-penta)
> Updated: 2026-09-06