# 20798139 Cover | Genuine Volvo Penta Part

## 🔧 Product Description

Fuel-filter housing cover used on TAD650/TAD750 common-rail engines. It closes the filter housing, supports the specified sensor/plug arrangement and seals the low-pressure fuel circuit. Application note: The approximately 23 x 2 mm cover O-ring is shown as integral/not separately marketed in applicable catalogue records.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TAD650VE
-   Volvo Penta TAD660VE
-   Volvo Penta TAD750GE
-   Volvo Penta TAD751GE
-   Volvo Penta TAD750VE
-   Volvo Penta TAD760VE

-   **Engine Family:** TAD
-   **HP Range:** Approximately 300 HP
-   **Year Range:** Approximately 2000s-2010s

## ⚙️ Key Features

-   Fuel-filter housing cover
-   0.018 kg
-   6 applications across TAD-series engines
-   The 23 x 2 mm cover O-ring is not available separately

## 🔌 Function

Closes the fuel-filter housing at its opening and seals the low-pressure fuel circuit, carrying the specified plug or sensor arrangement.

## ⚠️ Common Signs of Failure

-   Diesel weeping or a wet film around the cover
-   Hard starting, hunting or a stall under load as air is drawn in past the seal
-   Loss of prime after a filter change
-   Cover found cracked or distorted, so it no longer pulls down square
-   Sealing groove damaged, or the O-ring flattened and nibbled

## 🛠️ Service Notes

-   The 23 x 2 mm O-ring is not sold separately, so a damaged or perished seal means renewing the cover
-   Clean the housing face and check the groove before refitting, and prime and bleed the fuel system afterwards

## 🔄 Supersession & Cross Reference

### OEM / Related Numbers

-   20805349 fuel filter
-   20818370 bushing
-   20914974 fuel-filter housing
-   20799087 retaining screw
-   20886108 pressure sensor
-   20459192 gasket
-   20459193 O-ring
-   20459191 plug
-   20412324 screw

## 📦 Condition

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

## Details

- **Price:** 29.52 AUD
- **Vendor:** Volvo Penta
- **Type:** Fuel System
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 29.52 AUD | In stock |

## Images

- 20798139 Cover | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20798139-cover-genuine-volvo-penta)
> Updated: 2026-09-06