# 21260062 Thermostat Housing | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine thermostat housing for the cooling system of the Volvo Penta TAD550GE industrial and generating-set diesel engine. It provides the factory coolant outlet and thermostat seat and is a substantial cast component weighing approximately 3.38 kg.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TAD550GE
-   Volvo Penta TAD551GE
-   Volvo Penta TAD750GE
-   Volvo Penta TAD751GE
-   Volvo Penta TAD750VE
-   Volvo Penta TAD760VE

-   **Engine Family:** TAD

## ⚙️ Key Features

-   Confirmed TAD550GE cooling-system application
-   Approximate weight: 3.38 kg
-   Factory thermostat and coolant-outlet geometry
-   Designed for pressurised industrial-engine coolant
-   Uses the specified O-ring and outlet components

## 🔌 Function

The housing supports the thermostat and routes coolant between the engine, bypass and radiator circuits to regulate operating temperature.

## ⚠️ Common Signs of Failure

-   Engine running below normal temperature
-   Cracked or corroded casting
-   Thermostat not seating correctly

## 🛠️ Service Notes

-   Clean both faces back to bare metal without gouging them, and check the housing and its mating face for corrosion, pitting and distortion before fitting
-   Fit a new gasket or seal, and fit the thermostat and its sealing ring the right way round with any vent or jiggle pin positioned as it was originally
-   Tighten the bolts evenly in stages to the figures in the workshop manual for your engine; these castings are light and pull out of flat easily
-   Check the hoses, clips and any sensor or plug that screws into the housing while it is off, and use sealant only where it is specified
-   Fill and vent the system, run the engine to temperature, and confirm the thermostat opens and the joints stay dry

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   21260062 → Supersedes 20818351

### OEM / Related Numbers

-   20818351 earlier number superseded by this part
-   20798076 - Related O-ring
-   20450735 - Related coolant outlet
-   Thermostat and mounting hardware are selected from the TAD550GE serial-specific cooling diagram

## 📦 Condition

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

## Details

- **Price:** 849.15 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 849.15 AUD | In stock |

## Images

- 21260062 Thermostat Housing | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21260062-thermostat-housing-genuine-volvo-penta)
> Updated: 2026-08-22