# 22787841 Thermostat | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta thermostat weighing 0.078 kg, listed for 30 D series engine applications. It regulates coolant flow to hold operating temperature, so a stuck unit causes over- or under-cooling.

## 🚤 Compatibility

-   **Engine Family:** D
-   **HP Range:** 145-480 HP

Full model list at the end of this description.

## ⚙️ Key Features

-   Thermostat
-   0.078 kg
-   Listed for 30 D series applications

## 🔌 Function

Opens and closes the path to the heat exchanger as coolant temperature changes, holding the engine at its designed running temperature rather than letting it run cold or overheat.

## ⚠️ Common Signs of Failure

-   Engine slow to reach temperature, or never reaching it, when the thermostat sticks open
-   Rapid overheating from cold when it sticks shut
-   Temperature gauge swinging up and down in normal running
-   Sooty exhaust and poor economy from persistent under-cooling
-   Element found corroded, or the seal perished, when the housing is opened

## 🛠️ Service Notes

-   Renew the housing gasket or seal with the thermostat
-   Fit it the right way round with the sensing element toward the engine, and bleed the circuit fully after refilling
-   Check the heat exchanger, impeller and coolant level before blaming the thermostat for overheating

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta D6-340I-G, D6-380I-G, D6-440I-G, D6-480I-G, D6-300A-G, D6-340A-G, D6-380A-G, D6-440I-WJ-G, D6-480I-WJ-G, D6-300D-G, D6-340D-G, D6-380D-G, D6-440D-G, D6-480D-G, D6-400A-G, D6-440A-G, D6-300I-G, D6-480A-G
-   Volvo Penta D4-175I-G, D4-230I-G, D4-270I-G, D4-320I-G, D4-300I-G, D4-150A-G, D4-230A-G, D4-270A-G, D4-320A-G, D4-300A-G, D4-145I-G, D4-175 VG

## Details

- **Price:** 456.47 AUD
- **Vendor:** Volvo Penta
- **Type:** Cooling System
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 456.47 AUD | In stock |

## Images

- 22787841 Thermostat | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/22787841-thermostat-genuine-volvo-penta)
> Updated: 2026-09-06