3886430 Expansion Plug | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta expansion plug from the Engine group, weighing 0.005 kg and listed for 12 applications across the D and MD series. It supersedes part numbers 21281436 and 861857, one of which was catalogued earlier simply as a plug, so an older parts list may show it under that plainer name.

🚤 Compatibility

Typically suits:

• Volvo Penta D1-13
• Volvo Penta D1-13B
• Volvo Penta D1-13F
• Volvo Penta D1-20
• Volvo Penta D1-20B
• Volvo Penta D1-20F
• Volvo Penta MD2010B
• Volvo Penta MD2010-C
• Volvo Penta MD2010-D
• Volvo Penta MD2020B
• Volvo Penta MD2020-C
• Volvo Penta MD2020-D

• Engine Family: D, MD
• HP Range: 13-20 HP

⚙️ Key Features

• 0.005 kg
• 12 applications across the D and MD series
• Supersedes 21281436 and 861857
• One superseded number was listed earlier as a plug

🔌 Function

Seals a casting core hole, expanding against the bore to make a pressure-tight joint.

⚠️ Common Signs of Failure

• Coolant or oil seeping from a plug in the casting
• Rust stain or wet trail running down from the plug
• Plug pitted through, dished or loose in its bore
• Unexplained coolant loss with sound hoses

🛠️ Service Notes

• Two older numbers consolidate into this one, so an existing stock label may not match
• 3886427, 3886428 and 3886441 are the other expansion plug sizes in this group

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 3886430 → Supersedes 21281436

OEM / Related Numbers

• 861857 earlier number superseded by this part
• 21281436 earlier number superseded by this part

📦 Condition

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