# 3979593 Filler Cap | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta filler cap from the Cooling System group, weighing 18 grams and listed for 104 applications across the TAD, D, TWD and TADH series. It supersedes part numbers 17336824 and 1676577.

## 🚤 Compatibility

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

Full model list at the end of this description.

## ⚙️ Key Features

-   18 g
-   Supersedes 17336824 and 1676577
-   104 applications across the TAD, D, TWD and TADH series
-   Cooling System group

## 🔌 Function

Closes the coolant filler and holds the system at its working pressure, releasing to the expansion side when that pressure is exceeded.

## ⚠️ Common Signs of Failure

-   Coolant loss with no visible leak, or overflow into the expansion tank
-   Overheating or boiling in the header when the system will not hold pressure
-   Seal on the cap perished, swollen or torn
-   Cap will not latch down or feels slack in the neck
-   Corrosion or scale on the sealing face and filler neck

## 🛠️ Service Notes

-   Never open a pressure cap on a hot engine — let the system cool before removing it
-   Check the filler neck seat and the expansion hose too, and pressure test the cap if you have the tool

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   3979593 → Supersedes 17336824

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta D8A2-A MP, D8A5-A MH, D8A6-A MH, D8A5-A MG, D8A6-A MG, D8A4-A MP, D8A1-A MP, D8A3-A MP
-   Volvo Penta TAD1640-42GE-B, TAD1640GE, TAD1640VE-B, TAD1640-42VE-C
-   Volvo Penta TAD1341-43GE-B, TAD1341VE, TAD1341GE
-   Volvo Penta TAD1344-45GE-B, TAD1344VE, TAD1344GE
-   Volvo Penta TAD1641VE-B, TAD1641GE, TAD1641VE
-   Volvo Penta TAD1642VE-B, TAD1642GE, TAD1642VE
-   Volvo Penta TAD1650VE-B/51VE, TAD1650GE, TAD1650VE
-   Volvo Penta TAD840GE, TAD840-43VE, TAD840-43VE-C
-   Volvo Penta TAD1342VE, TAD1342GE
-   Volvo Penta TAD1343VE, TAD1343GE
-   Volvo Penta TAD1345GE, TAD1345VE
-   Volvo Penta TAD1350GE, TAD1350VE
-   Volvo Penta TAD1351GE, TAD1351-53VE
-   Volvo Penta TAD1643VE-B, TAD1643VE
-   Volvo Penta TAD540-42VE, TAD540-42VE-C
-   Volvo Penta TAD550-51VE, TAD550-52VE-C
-   Volvo Penta TAD570-72VE, TAD570-71VE-B
-   Volvo Penta TAD850-52VE, TAD850-52VE-C
-   Volvo Penta TAD880-82GE, TAD880-84VE
-   Volvo Penta TADH880-82GE, TADH880-84VE
-   Volvo Penta TWD1683GE-B, TWD1683VE
-   Volvo Penta TAD1140-42VE
-   Volvo Penta TAD1150-52VE
-   Volvo Penta TAD1170-72VE
-   Volvo Penta TAD1180-83VE
-   Volvo Penta TAD1340VE
-   Volvo Penta TAD1346GE
-   Volvo Penta TAD1352GE
-   Volvo Penta TAD1353GE
-   Volvo Penta TAD1354GE
-   Volvo Penta TAD1355GE
-   Volvo Penta TAD1360-62VE
-   Volvo Penta TAD1363-65VE
-   Volvo Penta TAD1371-75VE
-   Volvo Penta TAD1380-82GE
-   Volvo Penta TAD1381-85VE
-   Volvo Penta TAD1384-85VE-IWP
-   Volvo Penta TAD1651GE
-   Volvo Penta TAD1660-62VE
-   Volvo Penta TAD1662VE EU5
-   Volvo Penta TAD1670-72VE
-   Volvo Penta TAD552VE
-   Volvo Penta TAD560VE
-   Volvo Penta TAD561VE
-   Volvo Penta TAD580-83VE
-   Volvo Penta TAD650VE
-   Volvo Penta TAD660VE
-   Volvo Penta TAD750VE
-   Volvo Penta TAD760VE
-   Volvo Penta TAD761VE
-   Volvo Penta TAD762VE
-   Volvo Penta TAD763VE
-   Volvo Penta TAD764VE
-   Volvo Penta TAD765VE
-   Volvo Penta TAD841-43GE
-   Volvo Penta TAD851-53GE
-   Volvo Penta TAD853VE
-   Volvo Penta TAD870-73VE
-   Volvo Penta TAD940VE
-   Volvo Penta TAD941VE
-   Volvo Penta TAD942VE
-   Volvo Penta TAD943VE
-   Volvo Penta TAD950VE
-   Volvo Penta TAD951VE
-   Volvo Penta TAD952VE
-   Volvo Penta TWD1644-45GE
-   Volvo Penta TWD1672-1673GE
-   Volvo Penta TWD1682-83GE
-   Volvo Penta TWD1744GE

## Details

- **Price:** 31.11 AUD
- **Vendor:** Volvo Penta
- **Type:** Cooling System
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 31.11 AUD | In stock |

## Images

- 3979593 Filler Cap | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/3979593-filler-cap-genuine-volvo-penta)
> Updated: 2026-09-18