# 838666 Leak-Off Line | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta leak-off line from the Fuel System group, weighing 0.075 kg and listed for 21 applications across TMD, TD, AD, TAMD, MD and KAD series engines. It is the lighter of the two leak-off lines in this group.

## 🚤 Compatibility

-   **Engine Family:** TMD, TD, AD, TAMD, MD, KAD

Full model list at the end of this description.

## ⚙️ Key Features

-   0.075 kg
-   21 applications across TMD, TD, AD, TAMD, MD and KAD engines
-   Lighter of the two leak-off lines in this group

## 🔌 Function

Collects the small amount of fuel that leaks past each injector needle and returns it to the tank, keeping the injectors cool and the leakage contained.

## ⚠️ Common Signs of Failure

-   Diesel smell in the engine bay with no obvious pool
-   Wet, dirt-caked run down the cylinder head from the injector tops
-   Hose hardened, cracked or swollen at the connectors
-   Air drawn into the return, causing rough running or hard starting
-   Copper sealing washers found flattened or missing at the unions

## 🛠️ Service Notes

-   Leak-off line 838667 is the heavier version at 0.12 kg and is listed for the TAMD41P-A, TAMD41L-A, TAMD41M-A and TAMD41H-A engines, so check your engine designation before ordering
-   Renew the sealing washers at every union — they are single use
-   Do not overtighten the union nuts; the line is thin walled and will nip shut

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta TAMD31L-A, TAMD31M-A, TAMD31P, TAMD31P-A, TAMD31S, TAMD31A, TAMD31B, TAMD31D
-   Volvo Penta AD31, AD31B, AD31D-A, AD31L-A, AD31P-A, AD31XD
-   Volvo Penta TMD31A, TMD31B, TMD31D, TMD31L-A
-   Volvo Penta KAD32P
-   Volvo Penta MD31A
-   Volvo Penta TD31ACE

## Details

- **Price:** 272.59 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 272.59 AUD | In stock |

## Images

- 838666 Leak-Off Line | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/838666-leak-off-line-genuine-volvo-penta)
> Updated: 2026-08-22