# 3852102 Core Plug | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta core plug from the Engine group, weighing 0.011 kg and listed for 29 applications. Core plugs 3852101 and 3861289 carry the same 29 applications at 0.043 kg and 0.066 kg, so the three are plainly different plugs rather than alternatives; check which position is being replaced before ordering. Despite the word core in its name this is a fitted component, not a core deposit: it is a plug you buy and install, with no refundable charge and nothing to return. No diameter is published for any of the six core plugs listed here, and the published weights are not a safe guide to plug size, so measure the bore and order by part number.

## 🚤 Compatibility

Full model list at the end of this description.

## ⚙️ Key Features

-   0.011 kg
-   29 applications
-   Shares its 29 applications with core plugs 3852101 and 3861289, which are different sizes
-   Engine group

## 🔌 Function

Seals one of the core holes left in the casting when the sand core is withdrawn after casting, closing the passage behind it and keeping its fluid in.

## ⚠️ Common Signs of Failure

-   A damp or crusty trail running down the casting from a round plug
-   A slow loss of coolant with no hose, gasket or joint leak to be found
-   The plug visibly domed, dished or standing proud of its bore
-   Corrosion pitting round the rim of the plug, or the plug found loose when it is tapped

## 🛠️ Service Notes

-   Clean the bore back to bare metal and use a sealant suited to the fluid behind the plug, since a plug driven into a corroded bore will weep however well it is fitted
-   Drive the plug squarely and to the depth of the one that came out - over-driving it can push it right through into the passage behind

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta 3.0GLM-A, 3.0GLM-B, 3.0GLM-C, 3.0GLMMDA, 3.0GLP-A, 3.0GLP-B, 3.0GLP-C, 3.0GLP-D, 3.0GLP-E, 3.0GLP-J, 3.0GLP-N, 3.0GSM-A, 3.0GSM-B, 3.0GSMBYMCE, 3.0GSM-C, 3.0GSMLKD, 3.0GSMNCS, 3.0GSMWTR, 3.0GSP-A, 3.0GSP-B, 3.0GSPBYMCE, 3.0GSP-C, 3.0GSPEFS, 3.0GSPLKD, 3.0GSPMDA, 3.0GSPNCS, 3.0GSPWTR, 3.0GXiC-J, 3.0GXi-J

## Details

- **Price:** 61.3 AUD
- **Vendor:** Volvo Penta
- **Type:** Engine Components
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 61.30 AUD | In stock |

## Images

- 3852102 Core Plug | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/3852102-core-plug-genuine-volvo-penta)
> Updated: 2026-10-08