# 21118621 Plug | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine closure plug used to seal the specific opening assigned to part number 21118621. Public data does not establish a safe universal thread, diameter or engine application, so it must be matched directly to the original housing and catalogue position.

## 🚤 Compatibility

Full model list at the end of this description.

## ⚙️ Key Features

-   Genuine Volvo Penta closure plug
-   Original factory sealing geometry
-   Designed for the assigned housing or passage
-   Resistant to the intended engine fluid and temperature
-   Some parts systems record limited or discontinued availability

## 🔌 Function

The plug closes an unused drilling, service opening or fluid passage and prevents leakage or contamination.

## ⚠️ Common Signs of Failure

-   Weeping or seepage from the opening the plug closes
-   Fluid level falling with no other leak identified
-   The plug found loose or backed out
-   On removal, a damaged sealing face or corroded threads
-   The tapped bore showing pulled or stripped threads

## 🛠️ Service Notes

-   Clean the threads and the seating face before fitting, and make sure the opening itself is clear of old sealant, swarf and corrosion
-   Renew the sealing washer or O-ring where one is fitted rather than reusing a flattened one, and only use thread sealant where the workshop manual for your engine calls for it
-   Tighten to the figure given in the workshop manual for your engine — plugs in aluminium and other soft castings strip easily, and a plug pulled up hard to cure a leak usually distorts the seat and makes it worse
-   Where the plug closes an oil, fuel or coolant passage, run the engine up to temperature afterwards and check the joint under pressure before signing the job off
-   Keep removed plugs paired with the holes they came out of during a strip-down — plugs of very similar appearance often differ in thread, reach or sealing type

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta 8.1GiC-J, 8.1GiC-JF, 8.1GiCE-JF, 8.1GiCE-J, 8.1GiCE-M, 8.1GiCE-P, 8.1GiC-Q, 8.1GiCE-Q, 8.1IPSCE-JF, 8.1IPSCE-MF, 8.1IPSCE-P, 8.1IPSCE-Q, 5.7GXiC-J, 5.7GXiC-JF, 5.7GXiCE-JF, 5.7GXiCE-J, 5.7GXiCE-M, 5.7GiCE-300-M, 5.7GiCE-300-MF, 5.7GiC-300-J, 5.7GiCE-300-J, 5.7GiCE-300-JF, 5.7GiC-300-JF, 5.0GiC-J, 5.0GXiCE-JF, 5.0GXiCE-J, 5.0GXiC-JF, 5.0GXiCE-M, 5.0GXiCE-MF, 5.0GXiC-J

## Details

- **Price:** 1.62 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 1.62 AUD | In stock |

## Images

- 21118621 Plug | Genuine Volvo Penta Part

---

> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21118621-plug-genuine-volvo-penta)
> Updated: 2026-10-21