# 20412589 Filler Cap | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta oil filler cap installed in the valve cover on D5 and D7 engines. It provides the upper engine-oil filling point and works with the internal neck cap on early covers.

## 🚤 Compatibility

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

Full model list at the end of this description.

## ⚙️ Key Features

-   Valve-cover engine-oil filler cap
-   Confirmed on four- and six-cylinder D5 / D7 heads
-   Designed for the original filler-neck thread and sealing profile
-   Used with early cap 20412590 where specified
-   Prevents oil mist and contamination leakage
-   Engine type: Volvo Penta 5- and 7-litre industrial diesel

## 🔌 Function

Closes the upper oil-filler opening while allowing engine oil to be added during service.

## ⚠️ Common Signs of Failure

-   Oil mist around the cap
-   Cap not tightening securely
-   Damaged seal or thread
-   Dust entering the filler neck
-   Oil leakage under engine vibration

## 🛠️ Service Notes

-   Fit the cap specified for that filler on your engine — caps that look alike differ in seal, venting and pressure rating, and a substitute may hold the system at the wrong pressure or not seal at all
-   Wipe the filler neck and check its sealing land for nicks, corrosion and distortion before fitting; many apparent cap leaks are actually neck leaks
-   Check the cap's seal is soft and unbroken, and that any vent or breather hole through the cap is clear
-   Seat the cap fully, to its stop or lock position — a cap left part-turned will weep, and on a pressurised system can lift
-   Never open a cap on a hot pressurised system; let it cool first

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   20412589 → Supersedes 20405835

### OEM / Related Numbers

-   20405835 earlier number superseded by this part
-   20412587 - four-cylinder valve covers
-   20725337 - four-cylinder valve covers
-   20412599 - six-cylinder valve covers
-   20725338 - six-cylinder valve covers
-   20412590 - early internal neck cap
-   20412588 - related cover gaskets
-   20725315 - related cover gaskets
-   20412597 - related cover gaskets
-   20725316 - related cover gaskets

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta D7A-B TA, D7A-T, D7A-TA, D7C-B TA, D7C-TA
-   Volvo Penta D5A-B TA, D5A-T, D5A-TA
-   Volvo Penta MD2010, MD2010B
-   Volvo Penta TAD520GE, TAD520VE
-   Volvo Penta TAD530GE MECH, TAD530GE EDC4
-   Volvo Penta TAD531GE MECH, TAD531GE EDC4
-   Volvo Penta TAD720GE, TAD720VE
-   Volvo Penta TAD721GE, TAD721VE
-   Volvo Penta TAD722GE, TAD722VE
-   Volvo Penta TAD730GE MECH, TAD730GE EDC4
-   Volvo Penta TAD731GE MECH, TAD731GE EDC4
-   Volvo Penta TAD750GE, TAD750VE
-   Volvo Penta TD520GE, TD520VE
-   Volvo Penta TD720GE, TD720VE PP
-   Volvo Penta TAD420VE
-   Volvo Penta TAD532GE EDC4
-   Volvo Penta TAD550GE
-   Volvo Penta TAD551GE
-   Volvo Penta TAD620VE
-   Volvo Penta TAD650VE
-   Volvo Penta TAD660VE
-   Volvo Penta TAD732GE EDC4
-   Volvo Penta TAD733GE EDC4
-   Volvo Penta TAD751GE
-   Volvo Penta TAD760VE
-   Volvo Penta TD420VE

## Details

- **Price:** 27.29 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 27.29 AUD | In stock |

## Images

- 20412589 Filler Cap | Genuine Volvo Penta Part

---

> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20412589-filler-cap-genuine-volvo-penta)
> Updated: 2026-08-22