# 858165 Cap | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta engine cap weighing 3.4 kg and listed for 20 applications across AD, AQAD, TMD, MD and TAMD series engines. It is far heavier than the 0.334 kg cooling system cap 858131 also listed here, and the two are not alternatives despite sharing a name.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta AD30A
-   Volvo Penta AQAD30A
-   Volvo Penta TMD31A
-   Volvo Penta TMD31B
-   Volvo Penta MD30A
-   Volvo Penta TAMD30A
-   Volvo Penta TMD30A
-   Volvo Penta AD31
-   Volvo Penta AD31B
-   Volvo Penta TAMD41P-A
-   Volvo Penta TAMD31L-A
-   Volvo Penta TAMD31M-A
-   Volvo Penta TAMD31P
-   Volvo Penta TAMD31P-A
-   Volvo Penta TAMD41A
-   Volvo Penta TAMD31A
-   Volvo Penta TAMD31B
-   Volvo Penta TAMD40A
-   Volvo Penta TAMD40B
-   Volvo Penta MD31A

-   **Engine Family:** AD, AQAD, TMD, MD, TAMD

## ⚙️ Key Features

-   3.4 kg
-   20 applications across five engine series
-   Engine group
-   Not interchangeable with cooling system cap 858131

## 🔌 Function

Closes off its opening in the engine and forms the sealed face across it.

## ⚠️ Common Signs of Failure

-   Oil or coolant weeping from the cap joint
-   Sealing face corroded, pitted or distorted
-   Cracks around the fixing holes
-   Fasteners repeatedly working loose
-   Gasket found crushed unevenly on removal

## 🛠️ Service Notes

-   Renew the gasket and clean both faces before refitting
-   Pull the fasteners down evenly to avoid distorting the sealing face

## 📦 Condition

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

## Details

- **Price:** 5263.57 AUD
- **Vendor:** Volvo Penta
- **Type:** Engine Components
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 5263.57 AUD | In stock |

## Images

- 858165 Cap | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/858165-cap-genuine-volvo-penta)
> Updated: 2026-09-06