CATEngine Parts

153-5964 Thermostat — Cat 3003 301

This thermostat is a temperature-sensitive valve that regulates the flow of coolant within the engine's cooling system, maintaining optimal operating temperature. It is manufactured to meet precise OEM specifications, ensuring accurate temperature control and preventing premature wear associated with incorrect operating temperatures. Operators may notice the engine running too cool, taking excessively long to warm up, or experiencing overheating if the thermostat is stuck open or closed.

Thermostat – Part No 153-5964 – CAT Spare Part
Part Specifications
BrandCAT
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
MaterialBrass, stainless steel, wax pellet
ApplicationEngine cooling system
Service LifeReplace every 2,000 hrs or annually
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A failing thermostat might first manifest as the engine temperature gauge fluctuating erratically or consistently reading lower than normal. If the thermostat becomes stuck in the closed position, the engine will quickly overheat, leading to potential damage to internal components. If stuck open, the engine may run inefficiently and struggle to reach optimal operating temperature, increasing wear.

Installation Tip

Ensure the thermostat is installed in the correct orientation, with the spring typically facing the engine block or water pump inlet. Do not force the thermostat into its housing, as this can damage the valve or seat.

Service Note

Inspect the radiator hoses for signs of swelling or cracking, and check the coolant for contamination or low levels when replacing the thermostat.