# 21406640 Rocker Arm | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta D13 Exhaust Rocker Arm - Part Number: 21406640

  

A heavy-duty exhaust rocker arm assembly used across selected Volvo Penta TAD13 engine families. It pivots on the rocker shaft and transfers camshaft motion to the exhaust valve while maintaining the designed valve lift and timing.

  

⚙️ Key Features

  

• Genuine Volvo Penta exhaust rocker arm

• Heavy-duty D13 valve-train construction

• Precision roller and pivot surfaces

• Compatible with the original ball sockets and adjustment hardware

• Suitable for high-output industrial and generating-set duty

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 21406640 (current catalogued reference)

  

OEM / Related Numbers:

  

• 7421406640

• 85020068

• 85020079

• 21054149 - ball socket

• 944364 - O-ring

• 21054152 - ball socket

• 21430606 and 21430604 - adjusting screws

• 20712279 - sealing ring

  

Aftermarket / Verified Equivalents:

  

• Aftermarket D13 exhaust rocker arm cross-referenced to 21406640, 85020068 and 85020079

  

🚤 Compatibility

  

Commonly used on:

  

• Volvo Penta TAD13 exhaust valve-train assemblies

  

Typically suits:

  

• Engine models:

• TAD1340VE through TAD1345VE

• TAD1350VE through TAD1353VE

• TAD1360VE through TAD1365VE

• TAD1371VE through TAD1375VE

• TAD1341GE through TAD1345GE

• TAD1350GE through TAD1355GE

• TAD1380GE

• TAD1381GE

• TAD1382GE

  

• HP Range: Engine-rating dependent

• Engine Type: D13 inline-six turbocharged industrial or generating-set diesel

• Year Range: Valve-train and engine-serial dependent

  

🔌 Function

  

Transfers camshaft motion to the exhaust valve and maintains the specified valve lift and operating clearance.

  

Common signs of failure:

  

• Valve-train ticking or knocking

• Worn roller, pivot bore or contact surface

• Incorrect valve clearance

• Loss of cylinder power

• Abnormal camshaft wear

• Broken or seized rocker-arm components

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 1988.65 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 1988.65 AUD | In stock |

## Images

- 21406640 Rocker Arm | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21406640-rocker-arm-genuine-volvo-penta)
> Updated: 2026-08-02