20884347 Expansion Plug | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo Penta expansion plug for closing the specified casting core hole or drilled gallery. The plug's diameter, depth and interference fit are matched to the machined bore, creating a permanent seal without distorting the surrounding casting.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD1180-83VE

• Engine Family: TAD

⚙️ Key Features

• Genuine Volvo Penta Engine Expansion / Core Plug - part number 20884347
• Exact outside diameter for the casting bore
• Controlled cup or disc geometry develops the required interference
• Closes a coolant, oil or casting-core opening
• Material and coating suit the engine environment
• Correct installation depth is essential to sealing
• Bore must be clean, undamaged and free from corrosion before fitting
• Engine type: Application-specific Volvo Penta engine sealing and fluid-control system

🔌 Function

The plug is driven or pressed into the prepared bore, where its interference fit creates radial sealing pressure. It closes a manufacturing or service opening so the internal fluid circuit remains contained.

⚠️ Common Signs of Failure

• Coolant or oil seepage around the plug edge
• Corrosion perforates the plug
• Plug moves outward because the bore is damaged
• Incorrect installation distorts or splits the plug
• Leak recurs due to casting corrosion behind the plug

🛠️ Service Notes

• Clean the bore out to bare, sound metal and check it for corrosion, pitting or a raised lip — a plug will not seal in a wasted or scored bore, and that bore may need attention first
• Fit the plug square to the bore and drive it evenly with a tool or socket that bears on the correct part of the plug, to the depth the manual specifies; driven in cocked or too deep it will leak
• Seal it with a sealant of the type specified for that joint, not with a silicone or rubbery compound, which is slippery and lets a plug creep out under pressure
• With an expanding rubber type, seat it fully, then tighten the centre nut to expand it against the bore and check it again after the first heat cycle
• Fill, pressure-test or run the system and check the plug for weeping before closing up access, since many of these sit where you cannot see them once the engine is back together

🔄 Supersession & Cross Reference

Other-Brand OEM Numbers

• VOE20884347

📦 Condition

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