# 21166232 Plug | Genuine Volvo Penta Part

## 🔧 Product Description

A threaded closure plug used in the water-jacketed exhaust-manifold and catalytic-converter assembly of the 8.1GiC-400-JF. It closes a service, sensor or manufacturing opening and seals against the specified O-ring or thread interface.

## 🚤 Compatibility

-   **HP Range:** Approximately 400 HP

Full model list at the end of this description.

## ⚙️ Key Features

-   8.1GiC catalytic-exhaust housing plug
-   Heat- and corrosion-resistant construction
-   Correct thread and installed depth
-   Used at documented manifold/converter positions
-   Requires the specified sealing component
-   Engine type: 8.1-litre gasoline marine engine exhaust and catalytic-converter system
-   Quantity varies by assembly, most commonly six

## 🔌 Function

Closes and seals the assigned opening while maintaining exhaust-gas and cooling-water containment.

## ⚠️ Common Signs of Failure

-   Oil, coolant, hydraulic fluid or gas leakage
-   Hardened, flattened, cracked or extruded sealing material
-   Damaged thread or mating surface
-   Recurring leakage after incorrect torque or surface preparation

## 🛠️ 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

## 🔄 Supersession & Cross Reference

### OEM / Related Numbers

-   976970 - O-ring references at nearby exhaust plugs
-   977000 - O-ring references at nearby exhaust plugs
-   3889995 - catalytic converter
-   3848811 - exhaust-manifold references
-   3848809 - exhaust-manifold references

## 📦 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:** 17.45 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 17.45 AUD | In stock |

## Images

- 21166232 Plug | Genuine Volvo Penta Part
- 21166232 Plug | Genuine Volvo Penta Part - photo 2 of 2

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21166232-plug-genuine-volvo-penta)
> Updated: 2026-10-09