21013085 Expansion Plug | Genuine Volvo Penta Part

🔧 Product Description

Brand-new genuine Volvo Penta expansion plug matched to the specified opening in the engine block and flywheel housing. Its thread, press fit or sealing face closes the port while maintaining the integrity of the surrounding assembly.

🚤 Compatibility

Typically suits:

• Volvo Penta TD420VE
• Volvo Penta TAD550GE
• Volvo Penta TAD551GE
• Volvo Penta TAD620VE
• Volvo Penta TAD650VE
• Volvo Penta TAD660VE
• Volvo Penta TAD720VE
• Volvo Penta TAD721VE
• Volvo Penta TAD722VE
• Volvo Penta TAD750GE
• Volvo Penta TAD751GE
• Volvo Penta TAD750VE
• Volvo Penta TAD420VE
• Volvo Penta TAD520VE
• Volvo Penta TAD760VE

• Engine Family: TD, TAD
• Serial Range: SN-01099467

⚙️ Key Features

• Applicable through serial number 01099467
• Genuine Volvo Penta closure component
• Correct factory dimensions and seating geometry
• Prevents leakage and contamination entry
• Designed for the original pressure and temperature environment
• Seal or washer is separate unless listed
• Engine type: Volvo Penta four-cylinder industrial diesel
• 5 used per assembly

🔌 Function

Closes and seals the designated service, casting or fluid port in the original engine assembly.

⚠️ Common Signs of Failure

• Leakage or staining around the closure
• Damaged, corroded or crossed threads
• Loose fit or repeated movement
• Missing, hardened or damaged sealing element
• Cracking, distortion or contamination at the port

🛠️ 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

OEM Supersession Chain

• 21013085 → Supersedes 20405643
• 20405643 - Earlier OEM expansion-plug reference

OEM / Related Numbers

• 20405643 related reference

Other-Brand OEM Numbers

• VOE21013085

📦 Condition

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