# 22347455 Lock Ring | Genuine Volvo Penta Part

## 🔧 Product Description

A genuine retaining ring for the Volvo Penta expansion-tank level sight glass. Two lock rings are used in the documented TAD1640-TAD1642GE/TWD1643GE assembly to secure the sight-glass components and maintain even compression on the sealing O-rings.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TWD1643GE
-   Volvo Penta TWD1652GE
-   Volvo Penta TWD1653GE
-   Volvo Penta TWD1663GE

-   **Engine Family:** TWD

## ⚙️ Key Features

-   Genuine Volvo Penta sight-glass retaining ring
-   Retains level sight glass 22347448
-   Works with O-rings 22347446 and cover 22347431
-   Quantity two used in the documented expansion-tank assembly
-   Correct diameter and locking profile
-   Replace if distorted, corroded or no longer securely retained

## 🔌 Function

Locks the sight-glass cover and glass into the expansion tank so the O-rings remain evenly compressed.

## ⚠️ Common Signs of Failure

-   Ring corrosion or loss of spring tension
-   Distortion during removal
-   Sight glass becomes loose
-   Uneven O-ring compression and coolant leakage
-   Damaged retaining groove

## 🛠️ Service Notes

-   Always fit a new lock ring rather than reusing one; once it has been spread to fit it has lost some of its grip
-   Use the correct tool and open the ring only as far as it needs to go — a ring that has been over-spread or nipped in a vice will not hold
-   Check that the groove is clean and undamaged and that the ring is seated fully round its whole circumference before the assembly is loaded
-   Fit the ring the right way round where one face is chamfered or dished, with the square-cornered face against the load
-   Reject any ring showing a twist, a bright rubbed patch or a nick, and never grind or file one to fit

## 🔄 Supersession & Cross Reference

### OEM / Related Numbers

-   22347448 - Associated level sight glass
-   22347446 - Associated O-rings
-   22347431 - Associated cover
-   3547449 - Earlier float reference, obsolete

## 📦 Condition

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

## Details

- **Price:** 68.38 AUD
- **Vendor:** Volvo Penta
- **Type:** Engine Components
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 68.38 AUD | In stock |

## Images

- 22347455 Lock Ring | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/22347455-lock-ring-genuine-volvo-penta)
> Updated: 2026-09-06