VolvoEngine Parts

21746213 — Thermostat 21746213 For Volvo Penta Engine Tad540Ve Tad541Ve Volvo Bus B5Lh 3 B5Th 3 B8R 3

This thermostat is a critical component of the engine's cooling system, regulating coolant flow to maintain optimal operating temperature. It is manufactured to strict Volvo standards, ensuring reliable performance and durability compared to a worn unit that may stick open or closed. Operators may notice the engine running too cool or overheating, indicated by a fluctuating temperature gauge or warning lights.

Thermostat 21746213 For Volvo Penta Engine Tad540Ve Tad541Ve Volvo Bus B5Lh 3 B5Th 3 B8R 3 – Part No 21746213 – 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

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

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

Part TypeThermostat
MaterialMetal and wax pellet
ApplicationEngine cooling system
Service LifeReplace every 2,000 hours or 2 years
CompatibilityVolvo specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A failing thermostat may cause the engine temperature gauge to read erratically, either too high or too low. If the thermostat sticks closed, the engine can quickly overheat, leading to potential damage. If it sticks open, the engine may run inefficiently and struggle to reach its optimal operating temperature.

Installation Tip

Ensure the thermostat sealing surfaces are clean and free of debris before installation. Do not overtighten the thermostat housing bolts, as this can distort the housing and cause leaks.

Service Note

Inspect the radiator hoses and water pump for signs of wear or leakage when replacing the thermostat.