# 20798533 Exhaust Valve | Genuine Volvo Penta Part

## 🔧 Product Description

Precision cylinder-head valve-mechanism component used in the common-rail d5/d7 cylinder-head and valve mechanism. It maintains the intended gas-flow, sealing or spring-control function through the engine cycle.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TAD650VE
-   Volvo Penta TAD660VE

-   **Engine Family:** TAD
-   **HP Range:** Approximately 320 HP
-   **Year Range:** Approximately 2000s-2010s

## ⚙️ Key Features

-   Exhaust valve, 0.120 kg
-   Supersedes 21739319
-   Listed for 2 TAD applications
-   The matching inlet valve is 20798699 at 0.134 kg

## 🔌 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 leakage past the valve seat
-   Hard starting, rough running or reduced power
-   Burnt, bent, recessed or pitted valve face
-   Incomplete gas sealing or restricted cylinder breathing

## 🛠️ Service Notes

-   Check the guide and seat while the valve is out - a new valve into a worn guide will burn again
-   Inlet and exhaust valves are not interchangeable; 20798699 is the inlet

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   20798533 → Supersedes 21739319

### OEM / Related Numbers

-   21739319 earlier number superseded by this part
-   23095755 later cylinder-head reference
-   20849976 inlet valve seat
-   20849979 exhaust valve-seat insert
-   20459855 valve-stem seal
-   20459851 valve spring
-   20840747 spring disc
-   20459857 valve cotter
-   20840807 thrust washer
-   20792103 snap ring
-   20850047; 20850048; 20850049 graded head gaskets

### OEM Reman Alternatives

-   3801133 and 3801894 exchange/new cylinder-head references

### Aftermarket / Verified Equivalents

-   SRP: EV-98533
-   Olsson Parts: 51459
-   Freccia: R6675/RCR
-   Syncparts: 01-1533
-   OE Germany: 04 0520 201203

## 📦 Condition

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

## Details

- **Price:** 103.71 AUD
- **Vendor:** Volvo Penta
- **Type:** Engine Components
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 103.71 AUD | In stock |

## Images

- 20798533 Exhaust Valve | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20798533-exhaust-valve-genuine-volvo-penta)
> Updated: 2026-10-12