# 20405691 Gasket | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta gasket sealing coolant pump 20726077 to thermostat housing 20405688.

## 🚤 Compatibility

-   **Engine Family:** TD, TAD

Full model list at the end of this description.

## ⚙️ Key Features

-   Coolant-resistant pump-to-housing gasket
-   Used with coolant pump 20726077
-   Seals the pump to housing 20405688
-   Confirmed across D5/D7 water-pump arrangements
-   Included in related overhaul gasket lists
-   Engine type: Volvo Penta 5- and 7-litre industrial diesel

## 🔌 Function

Seals the coolant pump to the thermostat housing and retains cooling-system pressure.

## ⚠️ Common Signs of Failure

-   Coolant seepage at the pump joint
-   Gradual coolant loss
-   Gasket erosion or splitting
-   Engine overheating after leakage

## 🛠️ Service Notes

-   Fit a new gasket every time the joint is disturbed — a gasket takes a permanent set once it has been torqued and will not seal reliably a second time
-   Scrape both faces back to clean bare metal, keeping the blade at a shallow angle so it lifts the old material without gouging the surface, and use a plastic scraper on aluminium castings
-   Check the faces for flatness, cracks and corrosion pitting, and make sure no old gasket, carbon or hardened sealant is left in the corners or around the bolt holes
-   Fit the gasket dry unless the workshop manual for your engine calls for a sealant, and then only the type it specifies — surplus sealant squeezes out into oil, coolant and fuel passages
-   Draw the fasteners down progressively in the sequence and to the torque given in the manual for your engine, and recheck after the first heat cycle where the manual asks for it

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   20405691 → Supersedes 11700524

### OEM / Related Numbers

-   11700524 earlier number superseded by this part
-   20726077 - coolant pump
-   20405688 - housing
-   20412324 - flange screws
-   20412325 - housing O-rings

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   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 TAD532GE EDC4
-   Volvo Penta TAD550GE
-   Volvo Penta TAD551GE
-   Volvo Penta TAD732GE EDC4
-   Volvo Penta TAD733GE EDC4
-   Volvo Penta TAD751GE
-   Volvo Penta TAD760VE

## Details

- **Price:** 30.8 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 30.80 AUD | In stock |

## Images

- 20405691 Gasket | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20405691-gasket-genuine-volvo-penta)
> Updated: 2026-08-22