# 20405956 Coolant Pipe | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta formed coolant pipe used in the radiator and charge-air cooler package on TAD532GE, TAD730GE and TAD731GE engines. It works with coolant pipe 20405972, transfer tube 20405971 and the charge-air cooler connection.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TAD720GE
-   Volvo Penta TAD730GE MECH
-   Volvo Penta TAD730GE EDC4
-   Volvo Penta TAD731GE MECH
-   Volvo Penta TAD731GE EDC4
-   Volvo Penta TAD532GE EDC4

-   **Engine Family:** TAD

## ⚙️ Key Features

-   Factory-formed engine coolant pipe
-   Confirmed in copper-radiator cooling packages through the documented serial break
-   Used beside pipe 20405972 and tube 20405971
-   Connects through the original hose clamps, gasket and flange hardware
-   Pipe shape and end geometry are specific to the cooling package
-   Engine type: Volvo Penta 5- and 7-litre turbocharged industrial diesel

## 🔌 Function

Transfers engine coolant through the radiator and charge-air cooler cooling package.

## ⚠️ Common Signs of Failure

-   Coolant leakage or staining
-   Pipe corrosion, cracking or chafing
-   Engine or charge-air temperature increasing
-   Hose joint repeatedly loosening

## 🛠️ Service Notes

-   Clean both flanges or spigots and check the sealing lands for pitting and corrosion; renew every O-ring, seal or gasket at the joint rather than reusing one that has taken a set
-   Lubricate coolant-side O-rings with coolant or a rubber-safe lubricant — petroleum oil and grease swell and soften the rubber and end up in the coolant
-   Offer the pipe up and align both ends before pulling any fastener tight, so the joints are not held together by strain from a misaligned pipe or an over-stretched hose
-   Check the bore is clear of scale, sealant and debris before fitting, and inspect the pipe for internal corrosion or thinning if the old one was leaking
-   Refill with the coolant type and mix specified for your engine, bleed the system through, then check the joints again with the engine hot and up to pressure

## 🔄 Supersession & Cross Reference

### OEM / Related Numbers

-   20405972 - companion coolant pipe
-   20405971 - related transfer tube
-   20412342 - adjoining pipe
-   20412341 - flange gasket
-   973924 - flange screws
-   20412361 - charge-air cooler references
-   20795871 - charge-air cooler references

## 📦 Condition

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

## Details

- **Price:** 460.65 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 460.65 AUD | In stock |

## Images

- 20405956 Coolant Pipe | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20405956-coolant-pipe-genuine-volvo-penta)
> Updated: 2026-08-22