VolvoEngine Parts

21613426 Thermostat — Volvo FH12 FH16

This thermostat is a temperature-sensitive valve that regulates the flow of coolant through the engine's cooling system, maintaining optimal operating temperature. Constructed from durable brass and stainless steel, it ensures precise opening and closing at the specified temperature, unlike a worn or stuck thermostat. Operators may observe the engine temperature gauge fluctuating erratically, running too cold, or overheating if this thermostat malfunctions.

Thermostat – Part No 21613426 – 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 TypeThermostat
MaterialBrass and stainless steel
ApplicationEngine cooling system
Service LifeReplace every 4,000-6,000 hrs or as needed
CompatibilityVolvo FH12, FH16, FH 420, FH 460, FH 500
ConditionNew — OEM specification aftermarket

Failure Symptoms

An engine running consistently too cold or taking excessively long to reach operating temperature is a primary indicator of a faulty thermostat. If the thermostat becomes stuck closed, the engine temperature gauge will rapidly climb into the red zone, signaling a risk of overheating. Prolonged operation outside the optimal temperature range can lead to increased fuel consumption and premature engine wear.

Installation Tip

Ensure the thermostat sealing surface on the engine or housing is clean and free of debris before installation. Always install the thermostat with the jiggle pin facing upwards, if applicable, to allow air to escape the system.

Service Note

When replacing the thermostat, it is advisable to inspect the radiator cap and hoses for signs of wear or leaks.