# 21180405 Flange | Genuine Volvo Penta Part

## 🔧 Product Description

Brand-new genuine Volvo Penta crankcase flange closing the designated block gallery/service opening. It mounts with gasket 20412341 or 20933203 according to crankcase version and provides a rigid, pressure-tight closure.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TAD550GE
-   Volvo Penta TAD551GE
-   Volvo Penta TAD750GE
-   Volvo Penta TAD751GE

-   **Engine Family:** TAD

## ⚙️ Key Features

-   Machined crankcase closure flange
-   Used on crankcase 21025096 and 20851922 families
-   Correct bolt pattern and gasket face
-   Covers an engine gallery/service opening
-   Flange only; gasket and screw 975197 are separate
-   Engine type: Volvo Penta 5- and 7-litre industrial diesel

## 🔌 Function

Closes and seals the machined crankcase opening while allowing access during manufacturing or service.

## ⚠️ Common Signs of Failure

-   Oil or coolant leakage at the flange
-   Damaged screw threads
-   Repeated gasket failure from uneven clamp load

## 🛠️ Service Notes

-   Clean both mating faces back to clean metal and check them for flatness and for burrs or old gasket left in the sealing area; a face pulled up around a stud hole will not seal however hard it is tightened
-   Always fit a new gasket, seal or O-ring where the joint uses one, and only use a jointing compound if the workshop manual for your engine calls for one at that joint
-   Draw the fasteners up evenly in stages, working across the flange rather than round it, and finish to the tightening sequence and figures given for your engine
-   Inspect studs, nuts and threads while the joint is apart and renew anything corroded, stretched or seized — exhaust-side fasteners rarely come out twice
-   Re-check the joint for leaks once the engine has been up to working temperature and cooled again

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   21180405 → Supersedes 20796823 → Supersedes 20849912

### OEM / Related Numbers

-   20796823 earlier number superseded by this part
-   20849912 earlier number superseded by this part
-   Crankcase 21025096
-   Crankcase 20851922
-   Gasket 20412341
-   Gasket 20933203
-   Flange screw 975197

### Other-Brand OEM Numbers

-   VOE21180405

## 📦 Condition

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

## Details

- **Price:** 64.94 AUD
- **Vendor:** Volvo Penta
- **Type:** Engine Components
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 64.94 AUD | In stock |

## Images

- 21180405 Flange | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21180405-flange-genuine-volvo-penta)
> Updated: 2026-09-06