# 20397778 Frame | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta lower cylinder-block stiffening frame used on selected D12 engines. The ladder-style frame bolts beneath the cylinder block to increase crankcase rigidity, support main-bearing alignment and reduce structural vibration.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta D12C-A MP
-   Volvo Penta D12D-A MP
-   Volvo Penta D12D-B MP
-   Volvo Penta D12D-C MP
-   Volvo Penta D12D-D MP
-   Volvo Penta D12D-E MP
-   Volvo Penta D12D-F MP
-   Volvo Penta D12D-G MP
-   Volvo Penta D12D-H MP
-   Volvo Penta TWD1240VE

-   **Engine Family:** D, TWD

## ⚙️ Key Features

-   Lower crankcase ladder / stiffening frame
-   Approximate overall length 822 mm
-   Reinforces the cylinder block around the main-bearing structure
-   Used with the specified frame-to-block screws
-   Requires clean mating faces and the workshop-manual tightening sequence
-   Engine type: Volvo Penta 12-litre diesel
-   L=822mm (Volvo assembly listing)

## 🔌 Function

Increases lower-block rigidity and helps maintain crankshaft main-bearing alignment under combustion and driveline loads.

## ⚠️ Common Signs of Failure

-   Cracks or fretting at the frame-to-block joint
-   Abnormal lower-engine vibration
-   Main-bearing alignment problems
-   Loose or stretched frame screws
-   Oil leakage from disturbed lower-crankcase joints

## 🛠️ Service Notes

-   A frame is a structural member — check the surrounding mounts, fasteners and mating faces for corrosion, cracking and elongated holes before refitting
-   Offer it up and get everything aligned with the fasteners finger-tight before final tightening, so nothing the frame carries is pulled into strain
-   Fit every fastener the frame is designed to take and tighten to the figures in the workshop manual for your engine
-   Protect the fitting faces against corrosion where dissimilar metals meet, and refit any rubber mounts, pads or insulating strips
-   Recheck the fasteners for tightness after the first period in service, since a frame carries vibration loads continuously

## 🔄 Supersession & Cross Reference

### OEM / Related Numbers

-   8130120 - earlier related cylinder-block reference
-   20412465 - related cylinder-block references
-   20451181 - related cylinder-block references
-   965187 - related frame-fastening screw

## 📦 Condition

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

## Details

- **Price:** 2457.49 AUD
- **Vendor:** Volvo Penta
- **Type:** Engine Components
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 2457.49 AUD | In stock |

## Images

- 20397778 Frame | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20397778-frame-genuine-volvo-penta)
> Updated: 2026-09-18