# 20727018 Cover | Genuine Volvo Penta Part

## 🔧 Product Description

Service cover used in the D5/D7 coolant-circulation-pump and thermostat assembly. It closes the designated pump or thermostat chamber and provides the original hose/pipe sealing interface.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TWD1643GE
-   Volvo Penta TWD1652GE
-   Volvo Penta TWD1653GE
-   Volvo Penta TAD1640-42GE-B
-   Volvo Penta TAD1640GE
-   Volvo Penta TAD1640VE-B
-   Volvo Penta TAD1641VE-B
-   Volvo Penta TAD1642VE-B
-   Volvo Penta TAD1641GE
-   Volvo Penta TAD1642GE
-   Volvo Penta TAD1641VE
-   Volvo Penta TAD1642VE
-   Volvo Penta TAD1643VE
-   Volvo Penta TAD1650GE
-   Volvo Penta TAD1651GE
-   Volvo Penta TAD1650VE
-   Volvo Penta TAD1660-62VE
-   Volvo Penta TAD1662VE EU5
-   Volvo Penta TWD1663GE

-   **Engine Family:** TWD, TAD
-   **HP Range:** Approximately 300 HP
-   **Year Range:** Approximately late 1990s-2000s

## ⚙️ Key Features

-   OEM machined sealing face and port geometry
-   Used with the engine coolant pump and thermostat circuit
-   Designed for hot coolant and pressure cycling
-   Works with the specified sealing rings, connection pipe and flange screws
-   Direct replacement for a cracked, corroded or distorted cover
-   Engine type: Four- and six-cylinder turbocharged Volvo Penta diesel

## 🔌 Function

Seals and supports the designated coolant-pump or thermostat chamber while maintaining the original coolant-flow path.

## ⚠️ Common Signs of Failure

-   Coolant leakage at the cover or connection pipe
-   Corrosion, pitting or cracking of the cover
-   Warped sealing face causing repeated gasket or O-ring failure
-   Restricted coolant flow from internal scale or damage
-   Rising engine temperature or coolant loss

## 🛠️ Service Notes

-   Clean both sealing faces back to clean metal and check the cover for distortion, cracks or pulled bolt holes before refitting — a warped flange will not seal even with a new gasket
-   Where the joint uses a gasket, seal or O-ring, always fit a new one and seat it dry unless the workshop manual for your engine specifies a sealant; never try to make a poor joint tight with extra sealant
-   Tighten the fasteners progressively and evenly, working out from the centre, to the figure given in the manual for your engine — pressed steel, alloy and plastic covers distort easily if pulled down hard or unevenly
-   If the cover carries a shaft seal or bearing, support it square to the shaft as it goes on so the seal lip is not nicked or rolled over
-   Check that any breather, drain or oil return passage in the cover is clear before final tightening, and look for leaks once the engine has been run up to temperature

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   20727018 → Supersedes 8131377

### OEM / Related Numbers

-   8131377 earlier number superseded by this part
-   22902431 coolant pump
-   21103569 rubber moulding
-   21420336 connecting pipe
-   21423788 and 20799996 sealing rings
-   20824017 spacer sleeve
-   21613426 thermostat
-   984734 and 994386 retaining screws

### OEM Reman Alternatives

-   3801741 remanufactured coolant pump

## 📦 Condition

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

## Details

- **Price:** 89.07 AUD
- **Vendor:** Volvo Penta
- **Type:** Cooling System
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 89.07 AUD | In stock |

## Images

- 20727018 Cover | Genuine Volvo Penta Part
- 20727018 Cover | Genuine Volvo Penta Part - photo 2 of 2

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20727018-cover-genuine-volvo-penta)
> Updated: 2026-10-07