# 21385502 Filler Cap | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine filler cap designed for the associated Volvo Penta filler-neck installation on TAD11 industrial diesel engines. The cap closes the filling point, protects the system from contamination and maintains the specified seal at the filler neck.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TAD1380-82GE
-   Volvo Penta TAD880-82GE
-   Volvo Penta TAD880-84VE
-   Volvo Penta TAD1180-83VE
-   Volvo Penta TAD580-83VE
-   Volvo Penta TAD1381-85VE
-   Volvo Penta TAD570-72VE
-   Volvo Penta TAD570-71VE-B
-   Volvo Penta TAD1670-72VE
-   Volvo Penta TAD1170-72VE
-   Volvo Penta TAD870-73VE
-   Volvo Penta TWD1682-83GE
-   Volvo Penta TWD1683VE
-   Volvo Penta TWD1672-1673GE
-   Volvo Penta TAD1384-85VE-IWP
-   Volvo Penta TADH880-82GE
-   Volvo Penta TADH880-84VE

-   **Engine Family:** TAD, TWD, TADH

## ⚙️ Key Features

-   Genuine Volvo Penta filler cap
-   Designed for the corresponding OEM filler-neck assembly
-   Protects the system from dirt and moisture
-   Provides secure closure during engine operation
-   Correct OEM thread or locking profile
-   Direct replacement for cap 21385502

## 🔌 Function

The cap seals the filler opening and prevents fluid loss, dirt entry and moisture contamination. A sound cap also ensures that the filler neck remains securely closed under vibration and normal engine operating conditions.

## ⚠️ Common Signs of Failure

-   Fluid seepage around the cap
-   Cap loosening during engine operation
-   Damaged sealing face or internal seal
-   Cracked or distorted cap body
-   Corroded locking surfaces or threads
-   Dirt or moisture entering through an incomplete seal

## 🛠️ 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

## 📦 Condition

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

## Details

- **Price:** 101.61 AUD
- **Vendor:** Volvo Penta
- **Type:** Cooling System
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 101.61 AUD | In stock |

## Images

- 21385502 Filler Cap | Genuine Volvo Penta Part
- 21385502 Filler Cap | Genuine Volvo Penta Part - photo 2 of 2

---

> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21385502-filler-cap-genuine-volvo-penta)
> Updated: 2026-09-20