VolvoEngine Parts

24426721 Expansion Plug — Volvo FH12 FH16

This is an Expansion Plug, also known as a freeze plug or core plug, designed to seal openings in the engine block and cylinder head that were used during the casting process. Manufactured to precise specifications, it provides a durable seal against coolant pressure and temperature fluctuations, unlike a corroded or loose plug that can leak. Observable signs of a failing expansion plug include coolant leaks from the engine block exterior or visible rust and corrosion around the plug.

Expansion Plug – Part No 24426721 – Volvo Spare Part
Part Specifications
BrandVolvo
CategoryEngine Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Installation & Application Notes

Cross-reference part number with serial number before ordering to confirm fitment. Keep original parts until new ones are confirmed correct. Record part numbers replaced for future reference.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeExpansion Plug
MaterialSteel
ApplicationEngine block and head core holes
Service LifeReplace as needed due to corrosion
CompatibilityVolvo FH12, FH16, FH 420, FH 460
ConditionNew — OEM specification aftermarket

Failure Symptoms

The initial sign of a failing expansion plug is typically a small coolant leak originating from the engine block or head. If left unaddressed, corrosion can worsen, leading to a larger leak and potential loss of coolant, which can cause the engine to overheat. A significant coolant leak can lead to engine damage if the system is not kept full.

Installation Tip

Thoroughly clean the bore in the engine block or head before attempting to install the new plug. Avoid using excessive force, which can distort the plug or the bore.

Service Note

Inspect all other expansion plugs in the engine block for signs of corrosion or leakage.