21448082 Rocker Arm | Genuine Volvo Penta Part

🔧 Product Description

A precision valve-train rocker arm used on selected Volvo Penta D4, D5, D6, D7 and related industrial engine families. It transfers camshaft movement to the intake or exhaust valve.

⚙️ Key Features

• Genuine Volvo Penta rocker arm
• Precision-machined pivot and contact surfaces
• Designed for heavy-duty diesel valve-train loads
• Maintains correct valve lift and clearance
• One of several rocker positions used within the engine family
• Engine type: Four- or six-cylinder turbocharged diesel

🔌 Function

Transfers camshaft motion to the valve while maintaining the required valve lift and clearance.

⚠️ Common Signs of Failure

• Excessive valve clearance
• Worn pivot or contact pad
• Reduced cylinder performance
• Abnormal camshaft wear
• Rocker arm cracks or seizes

🛠️ Service Notes

• Keep the rocker arms in their fitted order if any are being refitted, and check the arms, the shaft or pivot and the pad or roller face for pitting, scoring and uneven wear
• Make sure the oil feed holes and any drilling through the arm are clear and flushed, and prime the contact faces with clean engine oil before assembly
• Confirm the pushrods are seated in their cups and the valve gear is correctly located before pulling the rocker shaft or pedestals down, then tighten evenly in the sequence and to the figures in the manual for your engine
• Set the valve clearances with the engine at the crank position the manual specifies for that cylinder, and recheck them once the pedestal bolts are fully torqued
• Turn the engine over by hand through a complete cycle to confirm nothing binds, and recheck the clearances after the first period of running if the manual requires it

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21448082 → Supersedes 20792878 → Supersedes 20849915

OEM / Related Numbers

• 20792878 earlier number superseded by this part
• 20849915 earlier number superseded by this part
• 21448926 related reference
• 20792876 related reference
• 11700370 related reference
• 20849924 related reference
• 21432929 related reference

📦 Condition

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