# 820566 Pressure Cap | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta pressure cap from the Cooling System group, listed for 6 applications across the D, TD, TMD and MD series engines. Its published weight of 0.98 kg is far higher than a cap of this kind would normally be, so treat that figure with caution and order by part number against your engine.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta D70CHC
-   Volvo Penta TD70CHC
-   Volvo Penta TMD70C
-   Volvo Penta MD70B
-   Volvo Penta TMD70B
-   Volvo Penta MD70C

-   **Engine Family:** D, TD, TMD, MD

## ⚙️ Key Features

-   6 applications across D, TD, TMD and MD engines
-   Cooling System group
-   Published weight of 0.98 kg looks too high to identify the part by
-   Order by part number

## 🔌 Function

Holds the cooling system at its designed pressure, raising the coolant's boiling point, and relieves pressure or admits coolant back as the system heats and cools.

## ⚠️ Common Signs of Failure

-   Coolant loss and steam or overflow when the engine is hot
-   Header tank hose collapsing as the engine cools
-   Overheating that clears when the cap is renewed
-   Seal in the cap hardened, split or the spring weak
-   Coolant crusting or staining around the filler neck

## 🛠️ Service Notes

-   Gasket 820569 at 0.023 kg is listed against the same D, TD, TMD and MD engine families, so consider renewing the joint at the same time
-   Never open a pressure cap on a hot engine - let it cool right down first
-   Have the cap's relief pressure checked, or simply renew it, before chasing an overheating fault further

## 📦 Condition

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

## Details

- **Price:** 925.49 AUD
- **Vendor:** Volvo Penta
- **Type:** Cooling System
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 925.49 AUD | In stock |

## Images

- 820566 Pressure Cap | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/820566-pressure-cap-genuine-volvo-penta)
> Updated: 2026-10-09