CATEngine Parts

306-2103 Water Temperature Regulator — Cat

This water temperature regulator is essential for maintaining the optimal operating temperature of the Caterpillar engine cooling system. It is engineered to meet precise OEM standards, ensuring accurate coolant flow regulation and preventing overheating or under-cooling compared to a faulty or stuck regulator. Operators might observe the engine temperature gauge fluctuating erratically, the engine running too cool, or experiencing frequent overheating episodes when this part fails.

Water Temperature Regulator – Part No 306-2103 – 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 TypeWater Temperature Regulator (Thermostat)
MaterialBrass and wax pellet
ApplicationEngine cooling system
Service LifeReplace every 2,000 hours or 2 years
CompatibilityCAT Engines
ConditionNew — OEM specification aftermarket

Failure Symptoms

A failing regulator may cause the engine temperature gauge to show inconsistent readings, either running too cold or overheating. If the regulator sticks closed, the engine can quickly overheat, leading to potential damage to the cylinder head and gasket. If it sticks open, the engine may run inefficiently and struggle to reach optimal operating temperature.

Installation Tip

Ensure the sealing surfaces on the engine block and thermostat housing are clean and free of debris before installation. Do not force the thermostat into the housing if it does not seat properly.

Service Note

Always replace the thermostat gasket when installing a new water temperature regulator.