# 858131 Cap | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta cooling system cap weighing 0.334 kg and listed for 3 applications. A second cap appears in this run under 858165, but that one belongs to the Engine group and weighs 3.4 kg, so the two are not alternatives to one another.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta 2003TB
-   Volvo Penta 2003T
-   Volvo Penta 2003TR

## ⚙️ Key Features

-   0.334 kg
-   3 applications
-   Cooling System group
-   Not interchangeable with Engine group cap 858165

## 🔌 Function

Closes off its housing in the cooling circuit and holds the coolant in.

## ⚠️ Common Signs of Failure

-   Coolant seepage or staining around the cap joint
-   Coolant level dropping with no other visible leak
-   Sealing face corroded, pitted or scaled
-   Seal or gasket hardened, flattened or split
-   Threads or clamping points damaged so the cap will not pull down evenly

## 🛠️ Service Notes

-   Renew the seal or gasket at the same time and clean the sealing face before refitting

## 📦 Condition

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

## Details

- **Price:** 2197.8 AUD
- **Vendor:** Volvo Penta
- **Type:** Cooling System
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 2197.80 AUD | In stock |

## Images

- 858131 Cap | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/858131-cap-genuine-volvo-penta)
> Updated: 2026-10-09