3858749 Oscillation Damper | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta oscillation damper from the Engine group, weighing 3.345 kg and listed for 3 applications across the AD and KAD series. It supersedes part number 3854705.

🚤 Compatibility

Typically suits:

• Volvo Penta AD31L-A
• Volvo Penta AD31P-A
• Volvo Penta KAD32P

• Engine Family: AD, KAD

⚙️ Key Features

• 3.345 kg
• Listed for 3 applications across the AD and KAD series
• Supersedes 3854705
• From the Engine group

🔌 Function

Damps torsional vibration in the crankshaft, absorbing the twisting pulses from each firing event so they are not passed on as fatigue into the shaft and drive train.

⚠️ Common Signs of Failure

• Vibration or a rough patch through part of the rev range
• Rubber ring perished, cracked or visibly moved on the hub
• Timing marks appearing to wander as the outer ring slips
• Wobble or run-out visible at the damper when running
• Belt running off line or squealing from a shifted pulley face

🛠️ Service Notes

• Confirm the engine is an AD or KAD build before ordering, as only three applications are listed
• A damper that has slipped can throw the timing marks out, so verify timing after fitting rather than trusting the old marks
• Check the belt alignment and tension once the damper is on

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 3858749 → Supersedes 3854705

📦 Condition

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