# 21085358 Cooling Hose | Genuine Volvo Penta Part

## 🔧 Product Description

A genuine Volvo Penta formed coolant hose for the D13B-A MP cooling-system assembly. This hose occupies a separate routing position from cooling hose 21085355 and is manufactured with the correct length, bends and end orientation for its assigned connections. Correct routing is essential because a hose that is twisted or forced into position can restrict coolant flow and place damaging side load on the adjoining pipes.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta D13C2-B MP
-   Volvo Penta D13C2-A MP
-   Volvo Penta D13C4-A MP
-   Volvo Penta D13B-A MP
-   Volvo Penta D13B-H MP
-   Volvo Penta D13B-G MP
-   Volvo Penta D13B-L MP
-   Volvo Penta D13B-K MP
-   Volvo Penta D13B-C MP
-   Volvo Penta D13C4-B MP
-   Volvo Penta D13C5-B MP
-   Volvo Penta D13C6-A MP
-   Volvo Penta D13C5-A MP
-   Volvo Penta D13C7-B MP
-   Volvo Penta D13C8-B MP

-   **Engine Family:** D

## ⚙️ Key Features

-   Genuine moulded D13B-A MP coolant-transfer hose
-   Engine-specific bend pattern and connection orientation
-   Designed for repeated pressure and temperature cycling
-   Flexible section absorbs engine movement between rigid cooling pipes
-   Not interchangeable with 21085355 unless the exact parts list for your engine specifically identifies it
-   Engine type: 13-litre inline-six turbocharged marine diesel

## 🔌 Function

Transfers coolant between the assigned rigid pipes or housings while accommodating vibration, thermal expansion and small relative movement within the engine cooling system.

## ⚠️ Common Signs of Failure

-   Coolant staining or dampness around the hose ends
-   Collapsed inner wall causing restricted flow
-   Swelling from oil or chemical contamination
-   Cracks at bends or clamp positions
-   Overheating or recurring coolant-level loss

## 🛠️ Service Notes

-   Fit the hose dry onto clean, smooth stubs and push it fully onto the spigot so the clip lands behind the bead; do not use grease or sealant to help it on
-   Keep the original routing and bend radius and use the correct clips, tightened evenly — a hose that is kinked, stretched or pulled to fit will fail early
-   Check the stubs for corrosion, pitting and burrs while the hose is off, and clear any scale or debris out of the system
-   Keep the hose away from hot surfaces and anything that can chafe it, and support long runs as they were originally clipped
-   Refill, vent and run the engine to temperature, then re-check every joint and re-tighten the clips once the hose has bedded in

## 🔄 Supersession & Cross Reference

### OEM / Related Numbers

-   21085355 - companion cooling hose in the same D13B-A MP system
-   3594798 - associated water pipes, depending on engine configuration
-   3594799 - associated water pipes, depending on engine configuration
-   3808196 - related hose used elsewhere in the cooling assembly
-   991656 - spacer sleeve used in the associated mounting arrangement

## 📦 Condition

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

## Details

- **Price:** 560.52 AUD
- **Vendor:** Volvo Penta
- **Type:** Hoses & Pipes
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 560.52 AUD | In stock |

## Images

- 21085358 Cooling Hose | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21085358-cooling-hose-genuine-volvo-penta)
> Updated: 2026-09-06