# 3853348 Core Plug | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta core plug for the rear position, from the Engine group, weighing 0.039 kg and listed for 136 applications across the DPX family. The rear marking is the ordering detail here - it is the only one of the six core plugs in this run that is tied to a named position, so check the position before substituting any of the others. It supersedes part number 856555, which was catalogued earlier as an expansion plug; core plug and expansion plug are the same item under different names. 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

-   **Engine Family:** DPX

Full model list at the end of this description.

## ⚙️ Key Features

-   For the rear position
-   0.039 kg
-   136 applications across the DPX family
-   The only one of the six core plugs here tied to a named position
-   Supersedes 856555, catalogued earlier as an expansion plug
-   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Seals one of the core holes left in the casting when the sand core is withdrawn after casting, closing the passage behind it and keeping its fluid in.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
-   Check the position before fitting - this one is listed for the rear, and the other core plugs in this run carry no position marking at all

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   3853348 → Supersedes 856555

### OEM / Related Numbers

-   856555 earlier number superseded by this part

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta 8.1Gi-B, 8.1Gi-BF, 8.1Gi-C, 8.1Gi-CF, 8.1GiC-J, 8.1GiC-JF, 8.1GiCE-JF, 8.1GiCE-J, 8.1GiCE-M, 8.1GiCE-P, 8.1GiC-Q, 8.1GiCE-Q, 8.1Gi-D, 8.1Gi-DF, 8.1Gi-E, 8.1Gi-EF, 8.1GiE-JF, 8.1GiE-J, 8.1GiE-KF, 8.1GiE-K, 8.1GiE-M, 8.1GiE-MF, 8.1GiE-P, 8.1Gi-F, 8.1Gi-FF, 8.1Gi-G, 8.1Gi-GF, 8.1Gi-H, 8.1Gi-HF, 8.1GiI-A, 8.1GiI-B, 8.1GiI-C, 8.1GiI-D, 8.1GiI-E, 8.1GiI-F, 8.1GiI-G, 8.1GiI-H, 8.1Gi-J, 8.1Gi-JF, 8.1GSi-A, 8.1GSiI-A, 8.1GXi-A, 8.1GXi-AF, 8.1GXi-B, 8.1GXi-BF, 8.1GXi-C, 8.1GXi-CF, 8.1GXi-D, 8.1GXi-DF, 8.1GXi-E, 8.1GXi-EF, 8.1GXiE-JF, 8.1GXiE-J, 8.1GXiE-K, 8.1GXiE-KF, 8.1GXiE-M, 8.1GXiE-P, 8.1GXi-F, 8.1GXi-FF, 8.1GXi-G, 8.1GXi-GF, 8.1GXiI-A, 8.1GXiI-B, 8.1GXiI-C, 8.1GXiI-D, 8.1GXiI-E, 8.1GXiI-F, 8.1GXiI-G, 8.1GXi-J, 8.1GXi-JF, 8.1IPSCE-JF, 8.1IPSCE-MF, 8.1IPSCE-P, 8.1IPSCE-Q, 8.1IPSE-JF, 8.1OSi-A, 8.1OSi-AF, 8.1OSi-B, 8.1OSi-BF, 8.1OSi-C, 8.1OSi-CF, 8.1OSi-D, 8.1OSi-DF, 8.1OSi-J, 8.1OSi-JF, 8.1OSiE-JF, 8.1OSiE-J, 8.2GLIMDM, 7.4GiINCSCE, 7.4GiPEFS, 7.4GiPBYCCE, 7.4GiPLKDCE, 7.4GiPLKECE, 7.4GiPNCACE, 7.4GiPNCSCE, 7.4GiPNCBCE, 7.4GiPNCMCE, 7.4GiPWTR, 7.4GLIMDM, 7.4GLINCS, 7.4GLPLKD, 7.4GLPLKE, 7.4GLPMDA, 7.4GLPMDM, 7.4GLPNCA, 7.4GLPNCB, 7.4GLPNCM, 7.4GLPNCS, 7.4GSiPBYCCE, 7.4GSiPEFS, 7.4GSiPWTR, 7.4GSiXNCB, 7.4GSiXNCM, 8.2GLPMDA, 8.2GLPMDM, 8.2GSiPBYCCE, 8.2GSiPEFS, 8.2GSiPWTR, 8.2GSiXNCB, 7.4GIIHUBCE, 7.4GLIHUB, 7.4GLINCC
-   Volvo Penta DPX375-A, DPX375-B, DPX375-BF, DPX375-CF
-   Volvo Penta DPX420-CF, DPX420-A, DPX420-B, DPX420-BF
-   Volvo Penta DPX385XBYDCE, DPX385XEFS, DPX385XLKE
-   Volvo Penta DPX415XEFS, DPX415XLKE, DPX415XBYDCE

## Details

- **Price:** 14.78 AUD
- **Vendor:** Volvo Penta
- **Type:** Engine Components
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 14.78 AUD | In stock |

## Images

- 3853348 Core Plug | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/3853348-core-plug-genuine-volvo-penta)
> Updated: 2026-10-12