# 21221878 Pump Unit | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine heavy-duty engine coolant circulation-pump unit for selected Volvo Penta D16 marine and industrial diesel engines.

## ⚙️ Key Features

-   D16 closed-circuit coolant circulation pump
-   Marine, industrial and power-generation applications
-   Documented Volvo commercial-engine OEM family
-   Complete pump unit; housing and pulley configuration must match

## 🔌 Function

The pump circulates freshwater coolant through the cylinder block, cylinder head, radiator or heat exchanger to control engine temperature.

## ⚠️ Common Signs of Failure

-   Coolant leakage from the pump
-   Bearing or impeller noise
-   Pulley or shaft wobble
-   Reduced coolant circulation
-   Coolant entering the bearing cavity
-   Pump seizure

## 🛠️ Service Notes

-   Fit a new gasket or seal at the pump mounting face; the original will not reseal once disturbed
-   Confirm the housing and pulley configuration match the pump being removed before fitting, since these must be consistent for correct drive alignment and coolant sealing
-   Bleed or prime the cooling system after installation to clear any air introduced during the pump change
-   Check the impeller and bearing for free rotation before returning the engine to service

## 🔄 Supersession & Cross Reference

### OEM / Related Numbers

-   20451516 related reference
-   20538845 related reference
-   20744939 related reference
-   21468471 related reference
-   21615952 related reference
-   22195450 related reference
-   22902431 related reference
-   24070789 related reference

### Aftermarket / Verified Equivalents

-   Swedish Lorry Parts: WAP-939
-   DT Spare Parts: 2.15245
-   PAI: 801131E
-   Febi Bilstein: 30451
-   Thermotec: WP-VL119
-   O.M.P. Aftermarket: 317.380
-   Sampa: 033.172
-   BF: 20160413000
-   Vaden Original: 525.03.0006
-   Vaden Original: 0103 097

## 📦 Condition

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

## Details

- **Price:** 7144.16 AUD
- **Vendor:** Volvo Penta
- **Type:** Pumps
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 7144.16 AUD | In stock |

## Images

- 21221878 Pump Unit | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21221878-pump-unit-genuine-volvo-penta)
> Updated: 2026-10-09