# 840797 Plug | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta plug from the Cooling System group, to be installed in the cylinder head, weighing 0.011 kg and listed for 29 applications across D and MS series engines.

## 🚤 Compatibility

-   **Engine Family:** D, MS

Full model list at the end of this description.

## ⚙️ Key Features

-   To be installed in the cylinder head
-   0.011 kg
-   29 published applications across D and MS series
-   Quantity varies by assembly, most commonly one

## 🔌 Function

Closes a coolant passage in the cylinder head so coolant is contained and routed correctly.

## ⚠️ Common Signs of Failure

-   Coolant weeping from the cylinder head at the plug
-   Plug corroded or pitted
-   Drive or thread damaged on removal
-   Deposits or crust around the plug
-   Coolant level falling with no external puddle

## 🛠️ Service Notes

-   Clamp 840676 carries the same note about installation in the cylinder head and the same 29 D and MS applications, so the two belong together
-   Plug 840677 at 0.027 kg and plug 840781 at 0.003 kg are the other plugs in this group, so check the size before ordering
-   Clean the seat and use a new sealing washer where one is fitted

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta 2003, 2003R, 2003R SOLAS, 120S-B, 2003TB, 2003TB SOLAS, 120SC, 2001AG, 2001B, 2001BG, 2001D, 2003D, 2003T, 2003TR, 2002AG, 2002B, 2002BG, 2002D, 2003B, 2003B SOLAS, 2003 SOLAS, 2001, 2002, 2001R
-   Volvo Penta MS2B-A, MS2B, MS2V
-   Volvo Penta D2002AG
-   Volvo Penta D2003AG

## Details

- **Price:** 19.98 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 19.98 AUD | In stock |

## Images

- 840797 Plug | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/840797-plug-genuine-volvo-penta)
> Updated: 2026-10-07