# 20381177 Plug | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta threaded plug used in the lubricating-oil cooler housing on the TAD1240GE. It closes a machined gallery or service opening in the cooler assembly and retains engine-oil pressure.

## 🚤 Compatibility

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

Full model list at the end of this description.

## ⚙️ Key Features

-   Threaded service plug for the oil-cooler housing
-   Confirmed in the TAD1240GE lubrication arrangement
-   Closes an internal oil gallery or machining port
-   Requires the specified sealing component or thread seal
-   Housing threads and plug sealing face must be inspected during service
-   Engine type: Volvo Penta 12-litre industrial diesel
-   Quantity varies by assembly, most commonly one

## 🔌 Function

Closes and seals an oil-gallery opening in the cooler housing.

## ⚠️ Common Signs of Failure

-   Engine-oil seepage around the plug
-   Low oil pressure from a leaking gallery
-   Damaged plug or housing threads
-   Rounded or corroded plug head
-   Failed sealing ring or thread seal

## 🛠️ 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

-   20749399 - related oil cooler
-   20551483 - sealing ring
-   8170596 - related covers
-   20538056 - related covers
-   471708 - rubber moulding
-   975664 - related O-ring
-   471752 - cover

## 📦 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, D16C2-E MH, D16C2-F MH
-   Volvo Penta TAD1640-42GE-B, TAD1640GE, TAD1640VE-B, TAD1640-42VE-C
-   Volvo Penta TAD1241GE, TAD1241VE, TAD1241-42VE
-   Volvo Penta TAD1641VE-B, TAD1641GE, TAD1641VE
-   Volvo Penta TAD1642VE-B, TAD1642GE, TAD1642VE
-   Volvo Penta TAD1650VE-B/51VE, TAD1650GE, TAD1650VE
-   Volvo Penta TAD1242GE, TAD1242VE
-   Volvo Penta TAD1250VE, TAD1250-52VE
-   Volvo Penta TAD1643VE-B, TAD1643VE
-   Volvo Penta TAD1240GE
-   Volvo Penta TAD1251VE
-   Volvo Penta TAD1252VE
-   Volvo Penta TAD1651GE
-   Volvo Penta TAD1660-62VE
-   Volvo Penta TAD1662VE EU5
-   Volvo Penta TAD1670-72VE
-   Volvo Penta TWD1240VE
-   Volvo Penta TWD1643GE
-   Volvo Penta TWD1644-45GE
-   Volvo Penta TWD1652GE
-   Volvo Penta TWD1653GE
-   Volvo Penta TWD1663GE
-   Volvo Penta TWD1672-1673GE
-   Volvo Penta TWD1682-83GE
-   Volvo Penta TWD1683VE
-   Volvo Penta TWD1744GE

## Details

- **Price:** 10.55 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 10.55 AUD | In stock |

## Images

- 20381177 Plug | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20381177-plug-genuine-volvo-penta)
> Updated: 2026-09-06