# 21630488 Adapter | Genuine Volvo Penta Part

## 🔧 Product Description

A tee adapter used in the seawater cooling system between the heat exchanger and exhaust elbows on Volvo Penta V8 marine petrol engines.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta V8-380-CE-A
-   Volvo Penta V8-380-C-B
-   Volvo Penta V8-380-CE-B
-   Volvo Penta V8-380-C-D
-   Volvo Penta V8-380-CE-D
-   Volvo Penta V8-430-CE-D
-   Volvo Penta V8-350-C-D
-   Volvo Penta V8-350-CE-D
-   Volvo Penta V8-380-C-A

-   **Engine Family:** V
-   **HP Range:** 350-430 HP

## ⚙️ Key Features

-   Seawater distribution tee
-   Heat-exchanger-to-exhaust-elbow circuit
-   Correct hose-tail diameters and flow passages
-   Used with hoses 21616859 and 21616871

## 🔌 Function

The adapter divides seawater flow from the heat exchanger into the branches feeding the exhaust-elbow cooling connections.

## ⚠️ Common Signs of Failure

-   Seawater leakage
-   Internal corrosion or restriction
-   Cracked hose tail
-   Uneven exhaust-elbow cooling
-   Loose or damaged hose clamps

## 🛠️ Service Notes

-   Check the adapter against both of the parts it has to join before fitting — adapters are specific to an engine and its variant, and one that is close but not correct will not seat or seal properly
-   Clean and inspect both mating faces or connector ends; grit, old sealant or corrosion on one side is the usual reason an adapted joint leaks or works intermittently
-   Renew any O-ring, gasket or sealing washer belonging to the joint rather than reusing the old one, and lubricate rubber seals lightly so they slide into place instead of rolling or nipping
-   Tighten threaded adapters to the figure given in the workshop manual for that connection; many go into aluminium or onto a soft seat and will distort if pulled up hard
-   Where the adapter is a workshop tool, check it for thread wear and damage before use and never modify it to make something fit

## 🔄 Supersession & Cross Reference

### OEM / Related Numbers

-   21616859 - Related seawater hose
-   21616871 - Related seawater hose
-   983744 - Hose nipple
-   3863439 - Hose clamps
-   978166 - Hose clamps
-   21807153 - Related hose
-   22592604 - Adapter
-   976970 - O-ring

## 📦 Condition

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

## Details

- **Price:** 13.96 AUD
- **Vendor:** Volvo Penta
- **Type:** Cooling System
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 13.96 AUD | In stock |

## Images

- 21630488 Adapter | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21630488-adapter-genuine-volvo-penta)
> Updated: 2026-10-09