21881185 Rocker Arm | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta D8 / TAD8 Fuel-Injector Rocker Arm - Part Number: 21881185

A genuine injector rocker arm used to transfer camshaft motion to the unit-injector mechanism on selected Volvo Penta D8 and TAD8 engines.

⚙️ Key Features

• Precision valve-train geometry

• Hardened contact and pivot surfaces

• Designed for high-cycle engine operation

• Maintains specified valve or injector motion

• Position- and engine-calibration-specific component

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 21881185 → supersedes 21266310

OEM / Related Numbers:

• 21266310 - earlier injector-rocker reference

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• Volvo Penta D8 marine and TAD8 industrial common-rail diesel systems

Typically suits:

• Engine / drive models:

• D8A1-A MP, D8A2-A MP

• TAD840VE, TAD841VE, TAD842VE, TAD843VE

• TAD850VE, TAD851VE, TAD852VE, TAD853VE

• TAD870VE, TAD871VE, TAD872VE, TAD873VE

• TAD880GE, TAD881GE, TAD882GE

• HP Range: Approximately 250HP - 650HP, depending on rating

• Engine Type: 7.7L inline six-cylinder common-rail turbocharged diesel

• Year Range: Approximately 2010 - 2021

• Serial / Fitment Note: Confirm the complete engine, drive or equipment product number and serial number before ordering.

🔌 Function

Transfers or controls valve-train motion so the intake valve, exhaust valve or injector operates at the specified timing and lift.

Common signs of failure:

• Top-end ticking or knocking

• Excessive valve or injector clearance

• Cylinder misfire, low compression or reduced power

• Pitting, scoring, cracking or loss of lubrication

• Severe valve, injector or camshaft damage after failure

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging