# 20459852 Valve Seat | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta valve seat insert for the cylinder head, from the Engine group, weighing 0.023 kg and listed for 3 applications across TD and TAD series engines.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TD420VE
-   Volvo Penta TAD620VE
-   Volvo Penta TAD420VE

-   **Engine Family:** TD, TAD

## ⚙️ Key Features

-   Cylinder-head valve seat insert
-   0.023 kg
-   Engine group
-   3 applications across TD and TAD series engines

## 🔌 Function

Provides the hardened sealing and heat-transfer surface against which the engine valve closes.

## ⚠️ Common Signs of Failure

-   Compression down on one cylinder, with hard starting or a misfire
-   Seat burnt, pitted or cracked, or found loose in the head
-   Valve clearance closing up repeatedly between services as the seat recedes
-   Valve sinking into the head so the correct contact width cannot be restored by refacing
-   Seat damage found alongside valve or piston damage during a head overhaul

## 🛠️ Service Notes

-   Valve seat 20459854 is also listed against the same three TD and TAD fitments, so measure the counterbore in the head and order by part number
-   Cut the seat and lap the valve as a matched pair, then check valve recession before the head goes back on

## 🔄 Supersession & Cross Reference

### Aftermarket / Verified Equivalents

-   Olsson Parts: 40891

## 📦 Condition

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

## Details

- **Price:** 42.11 AUD
- **Vendor:** Volvo Penta
- **Type:** Engine Components
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 42.11 AUD | In stock |

## Images

- 20459852 Valve Seat | Genuine Volvo Penta Part

---

> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20459852-valve-seat-genuine-volvo-penta)
> Updated: 2026-10-10