# 21055823 Cylinder Head | Genuine Volvo Penta Part

## 🔧 Product Description

Brand-new genuine Volvo Penta cylinder head for use in the Volvo Penta TAD620VE cylinder-head and valvetrain assembly. The machined casting forms the combustion-chamber roof and houses the valve, injector, coolant and lubrication passages required by the engine.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TAD620VE

-   **Engine Family:** TAD
-   **Serial Range:** SN10128118-

## ⚙️ Key Features

-   Genuine precision-machined cylinder-head reference
-   Correct combustion, valve and injector geometry
-   Integrated coolant and oil passages
-   Matched to the specified engine family and serial range
-   Head gasket, bolts, injectors and external installation parts are separate unless listed
-   Engine type: Volvo Penta 6-litre inline six-cylinder industrial diesel
-   Also supersedes Volvo part numbers 20459858 and 20498711

## 🔌 Function

Seals the top of the cylinders, supports the valvetrain and injectors, and routes intake, exhaust, coolant and lubricating oil through the upper engine.

## ⚠️ Common Signs of Failure

-   Coolant pressurisation or unexplained coolant loss
-   Low compression, misfire or difficult starting
-   Cracks around valve seats, injector bores or water passages
-   Repeated head-gasket failure or overheating

## 🛠️ Service Notes

-   Check the head for cracks and check the head and block faces for flatness with a straight edge before assembly, and have any doubt about the face or the valve seats resolved before the gasket goes on
-   Clean the gasket faces with care and without scoring them — do not attack an aluminium face with abrasive discs or scrapers, and keep debris out of the bores, coolant passages and bolt holes
-   Always use a new head gasket, and tighten in the stages, sequence and torque-plus-angle steps given in the workshop manual for your engine, with the threads and mating faces clean and lubricated exactly as that manual specifies
-   Head bolts on modern engines are angle-tightened and stretch permanently, so renew them wherever the manual calls for it rather than reusing them
-   Refill and bleed the cooling system properly, then run the engine and carry out any retightening or valve clearance recheck the manual requires after the first running period

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   21055823 → Supersedes 20747867

### OEM / Related Numbers

-   20489008 related reference
-   20747867 related reference
-   20799762 related reference
-   Inlet valve 21026535
-   Exhaust valve 21026536

### Other-Brand OEM Numbers

-   VOE21055823
-   Deutz 04291729

### OEM Reman Alternatives

-   Exchange/remanufactured head 3801233

### Aftermarket / Verified Equivalents

-   Ziptek: replacement cylinder head for 20489008 / 20747867 / 21055823
-   XMH: replacement cylinder head for 20489008 / 20747867 / 20799762 / 21055823

## 📦 Condition

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

## Details

- **Price:** 10108.84 AUD
- **Vendor:** Volvo Penta
- **Type:** Engine Components
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 10108.84 AUD | In stock |

## Images

- 21055823 Cylinder Head | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21055823-cylinder-head-genuine-volvo-penta)
> Updated: 2026-10-12