3886428 Expansion Plug | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta expansion plug from the Engine group, weighing 0.014 kg and listed for 33 applications across the D and MD series. It supersedes part number 861802. This is the heaviest of the four expansion plugs in this group, the others being 3886427, 3886430 and 3886441.

🚤 Compatibility

• Engine Family: D, MD
• HP Range: 13-75 HP

Full model list at the end of this description.

⚙️ Key Features

• 0.014 kg
• 33 applications across the D and MD series
• Supersedes 861802
• Largest of the four expansion plugs in this group

🔌 Function

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

⚠️ Common Signs of Failure

• Coolant or oil weeping from a plug in the casting
• Rust stain or wet trail below the plug
• Plug dished, pitted or standing proud of its bore
• Coolant loss with no external hose fault

🛠️ Service Notes

• Check the plug diameter called for on your engine, as 3886427, 3886430 and 3886441 are the other sizes
• Clean the bore of scale before fitting so the plug can expand evenly

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 3886428 → Supersedes 861802

OEM / Related Numbers

• 861802 earlier number superseded by this part

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D2-40, D2-40B, D2-40F, D2-55, D2-55B, D2-55C, D2-55D, D2-55E, D2-55F, D2-50F, D2-75, D2-75B, D2-75C, D2-75F, D2-60F
• Volvo Penta D1-30, D1-30B, D1-30F, D1-13, D1-13B, D1-13F, D1-20, D1-20B, D1-20F
• Volvo Penta MD2010B, MD2010-C, MD2010-D
• Volvo Penta MD2020B, MD2020-C, MD2020-D
• Volvo Penta MD2030B, MD2030-C, MD2030-D