# 20412318 Stud | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta exhaust mounting stud used at four positions on the low-mounted turbocharger installation fitted to TAD530GE and TAD531GE engines. It secures the exhaust flange and must be renewed if the threads have stretched, corroded or seized.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TD420VE
-   Volvo Penta TD520GE
-   Volvo Penta TAD550GE
-   Volvo Penta TAD551GE
-   Volvo Penta TAD560VE
-   Volvo Penta TAD561VE
-   Volvo Penta TAD420VE
-   Volvo Penta TAD520GE
-   Volvo Penta TAD520VE
-   Volvo Penta TAD530GE MECH
-   Volvo Penta TAD530GE EDC4
-   Volvo Penta TAD531GE MECH
-   Volvo Penta TAD531GE EDC4
-   Volvo Penta TAD532GE EDC4

-   **Engine Family:** TD, TAD

## ⚙️ Key Features

-   Four studs used in the applicable turbocharger flange
-   Confirmed in the front exhaust-outlet, low-mounted turbo arrangement
-   Designed for repeated high-temperature thermal cycling
-   Used with hexagon nuts 20517048 and flange 20405607
-   Apply the specified installation procedure rather than general-purpose fastener torque
-   Engine type: Volvo Penta 5-litre turbocharged industrial diesel
-   4 used per assembly

## 🔌 Function

Secures the turbocharger exhaust flange while maintaining clamp load through high exhaust temperature cycles.

## ⚠️ Common Signs of Failure

-   Exhaust soot around the flange
-   Stud corrosion, stretching or thread damage
-   Loose exhaust flange
-   Repeated exhaust-gasket failure
-   Stud seizure during turbocharger removal

## 🛠️ Service Notes

-   Clean and chase the female thread before fitting so the stud can pull down square and to full depth
-   Screw studs in with a proper stud installer or the double-nut method; gripping the plain shank with pliers or self-grips scores it and the nut will never seat or torque correctly afterwards
-   Screw the stud home until it seats as the manual for your engine describes, and no further — a stud wound in hard to cure a slack thread will simply split the casting
-   Renew studs that are stretched, necked, bent or corroded rather than reusing them; exhaust and manifold studs in particular are cheap next to the work of extracting a broken one
-   Tighten the nuts to the torque figures and in the sequence given in the workshop manual for your engine, and where a stud passes into an oil or coolant space seal it as the manual specifies

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   20412318 → Supersedes 20803881 → Supersedes 20405609

### OEM / Related Numbers

-   20803881 earlier number superseded by this part
-   24426737 - related turbocharger
-   20517048 - retaining hexagon nut
-   20405607 - exhaust flange
-   20795122 - related gaskets
-   20405590 - related gaskets

### OEM Reman Alternatives

-   3802191 - Volvo Penta exchange turbocharger

## 📦 Condition

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

## Details

- **Price:** 7.82 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 7.82 AUD | In stock |

## Images

- 20412318 Stud | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20412318-stud-genuine-volvo-penta)
> Updated: 2026-08-22