CATCooling System

3786178 Water Tank Radiator — Cat Excavator E312D

This is a radiator, a critical component of the engine's cooling system, responsible for dissipating heat from the coolant. It is constructed to meet stringent OEM standards, ensuring efficient heat transfer and durability, unlike a corroded or leaking radiator. Operators may notice a significant increase in engine operating temperature, steam from the engine bay, or a persistent coolant smell when this part fails.

Water Tank Radiator – Part No 3786178 – CAT Spare Part
Part Specifications
BrandCAT
CategoryCooling System
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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Parts Trading Company  ·  Mumbai, Est. 1956  ·  Same-day dispatch  ·  Ships worldwide  ·  GST invoice included

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Installation & Application Notes

Flush cooling system with distilled water before refilling. Use pre-mixed coolant — never plain water, which causes corrosion. Pressure-test system after any cooling repair. Check thermostat by immersing in hot water — should open at rated temperature.

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

Part TypeRadiator Assembly
MaterialAluminum and plastic construction
ApplicationEngine cooling system
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first sign of a failing radiator is often a gradual increase in engine operating temperature. If left unaddressed, this can lead to coolant loss and reduced cooling efficiency, potentially causing the engine to overheat during operation. Prolonged operation with an inefficient radiator risks severe engine damage due to excessive heat.

Installation Tip

Ensure all mounting surfaces are clean and free of debris before installation to prevent leaks. Avoid overtightening hose clamps, as this can damage the radiator's inlet and outlet ports.

Service Note

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