# 20528265 Valve Seat | Genuine Volvo Penta Part

## 🔧 Product Description

This genuine Volvo Penta valve seat is an OEM service component used in the Cylinder-Head Exhaust Valve Seat. It is manufactured to the original Volvo Penta dimensional, material and interface requirements for the documented Volvo Penta 9-litre TAD9 diesel application. Technical identification: Exhaust-valve seat ring: approximately 40.1 mm outside diameter, 30.9 mm inside diameter, 6.4 mm height and 30° seat angle. In service, it provides the hardened, gas-tight seating surface required for compression and combustion sealing at the specified inlet or exhaust valve. Selection must be confirmed by OEM part number 20528265, the exact model/product number, serial number and installed assembly configuration.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TAD952VE
-   Volvo Penta TAD951VE
-   Volvo Penta TAD950VE

-   **Engine Family:** TAD

## ⚙️ Key Features

-   OEM part number 20528265
-   Technical distinction: Exhaust-valve seat ring: approximately 40.1 mm outside diameter, 30.9 mm inside diameter, 6.4 mm height and 30° seat angle

## 🔌 Function

Provides the hardened, gas-tight seating surface required for compression and combustion sealing at the specified inlet or exhaust valve. Inspect all matched valve-train parts, lubricate contact surfaces, set valve recession/clearance where applicable and recheck after initial operation.

## ⚠️ Common Signs of Failure

-   Low cylinder compression or leakage during a leak-down test
-   Hard starting, misfire or uneven running
-   Loss of power, high exhaust temperature or excessive smoke
-   Burned, recessed, cracked or pitted valve/seat surfaces
-   Incorrect valve clearance or repeat leakage caused by guide/head wear

## 🛠️ Service Notes

-   Seat inserts are an interference fit in the head, so the counterbore has to be clean, round, flat and square before a new seat goes in; normal practice is to chill the insert and warm the head so it drops into place rather than forcing it
-   This is machine-shop work — the seat must be cut concentric with the valve guide after installation, so check or renew the guides at the same time and cut the seat angles once the insert is secure
-   Inspect the head casting for cracks and for a pounded or spread counterbore before committing to a new seat; a seat that has come loose has usually damaged its pocket
-   Use the interference fit, insert size and seat angles specified for your engine rather than any general figure, as they differ between heads
-   Check each valve on its finished seat for an even contact band right the way round, and confirm valve position and any permitted recession against the workshop manual for your engine

## 🔄 Supersession & Cross Reference

### OEM / Related Numbers

-   20564039 exhaust valve
-   20817645 valve guide

### Aftermarket / Verified Equivalents

-   DT Spare Parts: 2.10588
-   Sampa: 037.494
-   SLP: VS-265

## 📦 Condition

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

## Details

- **Price:** 101.61 AUD
- **Vendor:** Volvo Penta
- **Type:** Engine Components
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 101.61 AUD | In stock |

## Images

- 20528265 Valve Seat | Genuine Volvo Penta Part
- 20528265 Valve Seat | Genuine Volvo Penta Part, image 2

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20528265-valve-seat-genuine-volvo-penta)
> Updated: 2026-10-21