20888104 Rocker Arm | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta Intake Rocker Arm with Ceramic Roller - Part Number: 20888104

A genuine Volvo Penta intake rocker arm with ceramic roller for the applicable D16/TAD16 cylinder-head configuration. The rocker follows the camshaft lobe through its roller and transfers the programmed lift to the intake valve bridge while maintaining low friction at the cam contact.

Correct selection must be confirmed against the complete Volvo Penta product designation, product number and serial number because neighbouring engine variants can use different dimensions, connections, calibration or serial-controlled revisions.

⚙️ Key Features

• Intake rocker arm for specified D16/TAD16 valve-train builds

• Ceramic roller reduces sliding friction and rotating mass at the cam interface

• Precision pivot bore and roller alignment preserve valve lift and timing

• Hardened contact surfaces carry repeated valve-spring load

• 20888104 is serial controlled; later 21282818 and VCB-specific 21415405 are application-dependent alternatives

• Confirm engine serial number and whether Volvo Compression Brake equipment is fitted

• Lubrication passages must be clear and the cam lobe inspected before installation

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 20888104 (earlier ceramic-roller intake rocker for specified serial range)

• 21282818 (later intake rocker from specified serial break)

• 21415405 (VCB-equipped application reference)

OEM / Related Numbers:

• 20888104

• 21282818

• 21415405

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• 16-litre D16/TAD16 cylinder-head and valve-train systems

Typically suits:

• Engine models:

• TAD1640GE

• TAD1641GE

• TAD1642GE

• TAD1640VE-B

• TAD1641VE

• TAD1641VE-B

• TAD1642VE

• TAD1642VE-B

• TAD1643VE

• HP Range: Confirm by exact engine designation and serial number

• Engine Type: 16-litre D16/TAD16 cylinder-head and valve-train systems

• Year / Serial Range: 20888104 applies through the specified serial range; 21282818 is used from serial 2016010025 in documented applications, while 21415405 is VCB-specific

• Application Note: Ceramic-roller intake rocker arm; confirm serial number and Volvo Compression Brake configuration.

🔌 Function

The rocker converts camshaft-lobe motion into downward movement of the intake valve bridge. The roller must track the lobe centrally, and the rocker geometry must preserve the designed ratio so both intake valves open evenly and with the correct lift.

Common signs of failure:

• Valve-train knock or irregular intake-valve clearance

• Roller does not rotate freely or develops surface damage

• Unequal valve opening or loss of cylinder filling

• Metal or ceramic debris in the rocker area

• Pivot, roller or contact surfaces show pitting from lubrication failure

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging