# 20482741 Inlet Valve | Genuine Volvo Penta Part

## 🔧 Product Description

Standard-size inlet valve for Deutz-derived Volvo Penta D4D/D6D and related TAD engine cylinder heads. Documented dimensions are approximately 119.3 mm overall length, 41.7 mm head diameter and 8 mm stem diameter, with a 30-degree seat.

## 🚤 Compatibility

-   **HP Range:** Approximately 300 HP
-   **Year Range:** Approximately late 1990s-2000s

## ⚙️ Key Features

-   OEM valve head, stem length and seat-angle specification
-   Maintains combustion sealing and correct intake or exhaust gas flow
-   Designed for high-cycle cylinder-head operation and temperature exposure
-   Requires valve-guide, seat and spring inspection during installation
-   Suitable for professional cylinder-head overhaul
-   Engine type: Deutz-derived four- and six-cylinder turbocharged Volvo Penta diesel

## 🔌 Function

Opens and closes the cylinder-head gas port at the correct point in the engine cycle and seals against the valve seat during compression and combustion.

## ⚠️ Common Signs of Failure

-   Low compression or cylinder leakage through the inlet valve
-   Hard starting, rough running or reduced power
-   Bent, burnt, recessed or pitted valve face
-   Poor cylinder filling caused by a valve that does not open or seat correctly

## 🛠️ Service Notes

-   Keep valves in order and fit each one to the seat it is lapped to; a new valve must be lapped in until a continuous, even contact band shows right round
-   Check the guide for wear before fitting a new valve — a good valve in a worn guide will not seat or seal for long
-   Clean the deposits from the port and seat, wash every trace of lapping paste out of the head, and lubricate the stem with clean engine oil on assembly
-   Fit new stem seals and check installed spring height and valve recess against the figures in the workshop manual for your engine
-   Set the valve clearances on assembly and re-check them after the first running period, following the procedure for your engine

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   20482741 → Supersedes 20791517 → Supersedes 20459862

### OEM / Related Numbers

-   20791517 earlier number superseded by this part
-   20459862 earlier number superseded by this part

### Other-Brand OEM Numbers

-   Deutz: 04283376
-   Deutz: 04254934

### Aftermarket / Verified Equivalents

-   OE Germany: 040520201200
-   OE Germany: 03 0520 600000
-   SLP: ILV-741

## 📦 Condition

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

## Details

- **Price:** 90.28 AUD
- **Vendor:** Volvo Penta
- **Type:** Engine Components
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 90.28 AUD | In stock |

## Images

- 20482741 Inlet Valve | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20482741-inlet-valve-genuine-volvo-penta)
> Updated: 2026-10-06