# 420877 Valve Seat | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta oversize valve seat from the Engine group, weighing 0.041 kg and listed for 7 applications across the TAMD, TWD and TD series engines. The oversize version is for a head whose seat recess has been machined out beyond standard.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TAMD63L-A
-   Volvo Penta TWD630ME
-   Volvo Penta TAMD63P-A
-   Volvo Penta TD630ME
-   Volvo Penta TD630VE
-   Volvo Penta TWD630VE
-   Volvo Penta TD640VE

-   **Engine Family:** TAMD, TWD, TD

## ⚙️ Key Features

-   Oversize
-   0.041 kg
-   7 applications across the TAMD, TWD and TD series

## 🔌 Function

Provides the hardened face in the head that the valve closes onto and seals against, in an oversize outside diameter for a recut recess.

## ⚠️ Common Signs of Failure

-   Compression down on one cylinder with hard starting
-   Popping or spitting back through the inlet or exhaust
-   Seat face burnt, pitted or with a channel cut in it
-   Seat loose in its recess or turning
-   Seat cracked across the face

## 🛠️ Service Notes

-   This seat and the standard-size seat 420875 carry exactly the same published weight, so weight cannot even tell standard from oversize in this group — order by part number
-   Seat 420876 is the other oversize seat at 0.029 kg
-   Measure the machined recess before ordering an oversize seat

## 📦 Condition

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

## Details

- **Price:** 120.44 AUD
- **Vendor:** Volvo Penta
- **Type:** Engine Components
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 120.44 AUD | In stock |

## Images

- 420877 Valve Seat | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/420877-valve-seat-genuine-volvo-penta)
> Updated: 2026-10-10