# 21423788 Sealing Ring | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine sealing ring used with connection pipe 21420336 in the coolant-pump circuit of Volvo Penta D16 industrial and generating-set engines.

## 🚤 Compatibility

-   **Engine Family:** TAD, D, TWD

Full model list at the end of this description.

## ⚙️ Key Features

-   D16 coolant-pump connection seal
-   Used with pipe 21420336
-   Revised replacement for earlier gasket 20818346 where specified
-   Also supersedes Volvo part number 8131290

## 🔌 Function

The ring seals the coolant-pump connection pipe and prevents pressurised coolant escaping from the joint.

## ⚠️ Common Signs of Failure

-   Seal flattened or cut
-   Corrosion around the joint
-   Engine overheating after coolant loss

## 🛠️ Service Notes

-   Always fit a new sealing ring rather than reusing the old one — a ring that has been compressed once has taken a set and will not seal reliably a second time
-   Clean the groove or seat and check it for scoring, corrosion and old sealant before fitting; a mark across the sealing face will leak however good the ring is
-   Ease the ring into place without stretching, twisting or dragging it over sharp edges or threads, and check it is seated squarely all the way round before closing the joint
-   Do not add sealant or jointing compound unless the workshop manual for your engine calls for it, and tighten the joint or union to the figure given in that manual
-   Check the joint for weeping once the engine has been run up to temperature and allowed to cool, as many sealing rings only show a leak after a heat cycle

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   21423788 → Supersedes 20823005

### OEM / Related Numbers

-   20818346 related reference
-   21420336 - Matching connection pipe

### Aftermarket / Verified Equivalents

-   Auger: 26000396

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta D16C-A MG, D16C-A MH, D16C-B MH, D16C-C MH, D16C1-E MG, D16C1-F MG, D16C2-E MG, D16C2-F MG, D16C-D MH, D16C1-E MH, D16C1-F MH
-   Volvo Penta TAD1640-42GE-B, TAD1640GE, TAD1640VE-B, TAD1640-42VE-C
-   Volvo Penta TAD1641VE-B, TAD1641GE, TAD1641VE
-   Volvo Penta TAD1642VE-B, TAD1642GE, TAD1642VE
-   Volvo Penta TAD1650VE-B/51VE, TAD1650GE, TAD1650VE
-   Volvo Penta TAD1643VE-B, TAD1643VE
-   Volvo Penta TWD1683GE-B, TWD1683VE
-   Volvo Penta TAD1651GE
-   Volvo Penta TAD1660-62VE
-   Volvo Penta TAD1662VE EU5
-   Volvo Penta TAD1670-72VE
-   Volvo Penta TWD1643GE
-   Volvo Penta TWD1644-45GE
-   Volvo Penta TWD1652GE
-   Volvo Penta TWD1653GE
-   Volvo Penta TWD1663GE
-   Volvo Penta TWD1672-1673GE
-   Volvo Penta TWD1682-83GE

## Details

- **Price:** 12.1 AUD
- **Vendor:** Volvo Penta
- **Type:** Gaskets & Seals
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 12.10 AUD | In stock |

## Images

- 21423788 Sealing Ring | Genuine Volvo Penta Part
- 21423788 Sealing Ring | Genuine Volvo Penta Part - photo 2 of 2

---

> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21423788-sealing-ring-genuine-volvo-penta)
> Updated: 2026-09-19