# 3801519 Longblock | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta remanufactured long block for the TWD1644GE and TWD1645GE, weighing 1371.664 kg. The reman catalogue defines a long block as a cylinder block assembly with pistons, connecting rods, crankshaft, camshaft, cylinder heads, rocker mechanism, oil pan and valve cover, and lists no reman short block for this engine. These are two-stage engines: the catalogue puts cylinder head 3801803, unit injector 3801144, circulation pump 3801418 and a pair of turbochargers against them, 3801142 on high pressure and 3801141 on low pressure. It is the only TWD-series long block listed here, the other four all being TAD. Supplied on an exchange basis: core deposit 3804519 is charged alongside it and refunded once the old unit is returned, so both numbers appear on the order.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TWD1644-45GE

-   **Engine Family:** TWD

## ⚙️ Key Features

-   Contains pistons, connecting rods, crankshaft, camshaft, cylinder heads, rocker mechanism, oil pan and valve cover
-   1371.664 kg
-   The only TWD-series long block of the five listed here
-   No reman short block is offered for this engine
-   Runs a two-stage turbo installation - 3801142 high pressure and 3801141 low pressure

## 🔌 Function

Carries the whole reciprocating core of the engine as one remanufactured assembly - block, crankshaft, pistons, connecting rods, camshaft, cylinder heads and rocker gear - so a worn or damaged engine can be put back into service without buying a new one.

## ⚠️ Common Signs of Failure

-   Low or uneven compression
-   Heavy crankcase blow-by
-   Bottom-end knock rising with load
-   Oil pressure down when hot
-   Coolant in the oil

## 🛠️ Service Notes

-   Confirm the engine is TWD series, as the TAD-series long blocks here sit in the same weight band
-   Inspect both turbocharger stages and the pipework between them before the rebuilt engine is loaded, since debris from one stage travels into the next
-   Core deposit 3804519 is charged with this unit and refunded when the old one is returned - order both together

## 📦 Condition

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

## Details

- **Price:** 66714.67 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 66714.67 AUD | In stock |

## Images

- 3801519 Longblock | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/3801519-longblock-genuine-volvo-penta)
> Updated: 2026-08-22