# 3858079 Cap | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta cap from the Marine Propulsion group, weighing 0.014 kg and listed for 44 applications across the AD, D, TSK, TMD, DP and DPX series. It supersedes part number 854533, which was catalogued earlier as a cover.

## 🚤 Compatibility

-   **Engine Family:** AD, D, TSK, TMD, DP, DPX, HS, SP, S, TAMD

Full model list at the end of this description.

## ⚙️ Key Features

-   Listed for 44 applications across six series
-   0.014 kg
-   Supersedes 854533, earlier catalogued as a cover
-   From the Marine Propulsion group

## 🔌 Function

Closes off the opening it fits, keeping dirt and water out and holding fluid in where the assembly is not meant to breathe.

## ⚠️ Common Signs of Failure

-   Fluid weeping or spitting from around the cap
-   Cap loose, or refusing to seat and hold
-   Cap cracked, distorted or gone brittle
-   Dirt or water found inside the opening the cap closes
-   Seal face on the cap flattened or damaged

## 🛠️ Service Notes

-   Renew the seal behind the cap at the same time - seal 3858078 and o-ring 3858073 cover the same applications
-   Do not overtighten a plastic or light alloy cap onto a damaged seat

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   3858079 → Supersedes 854533

### OEM / Related Numbers

-   854533 earlier number superseded by this part

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta TSK DP-E, TSK DP-S, TSK DPX-C, TSK SX-M, TSK SX-MAC, TSK SX-MACLT, TSK SX-MDA, TSK SX-MDB, TSK SX-MHP, TSK SX-MLT
-   Volvo Penta TAMD31L, TAMD31L-A, TAMD31M, TAMD31M-A, TAMD31P, TAMD31P-A, TAMD31S, TAMD31D, TAMD31P-B
-   Volvo Penta AD31D, AD31D-A, AD31L-A, AD31P-A, AD31XD
-   Volvo Penta TAMD41H-A, TAMD41H-B, TAMD41P-A, TAMD41P, TAMD41P-B
-   Volvo Penta DP-C1, DP-D1, DP-E
-   Volvo Penta AD41L-A, AD41P-A
-   Volvo Penta Shield, Shield for DPX
-   Volvo Penta TMD31D, TMD31L-A
-   Volvo Penta D41L-A
-   Volvo Penta DPX-R
-   Volvo Penta HS1A
-   Volvo Penta SP-C1
-   Volvo Penta TAMD42B
-   Volvo Penta TMD41L-A

## Details

- **Price:** 51.36 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 51.36 AUD | In stock |

## Images

- 3858079 Cap | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/3858079-cap-genuine-volvo-penta)
> Updated: 2026-08-22