CATEngine Parts

171-8709-3e-6430 Coolant Flow Switch — Cat 3306 3516

This coolant flow switch monitors the temperature of the engine coolant and signals the control system when a specific threshold is reached, often used to activate cooling fans or alert the operator. It is manufactured to precise specifications, ensuring accurate temperature sensing unlike a faulty switch that may provide intermittent or incorrect readings. Observable symptoms of a failing switch include the cooling fan not engaging when needed, or a dashboard warning light illuminating without a clear cause.

Coolant Flow Switch – Part No 171-8709-3e-6430 – 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 TypeCoolant Flow Switch
MaterialBrass or Steel
ApplicationEngine cooling system
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A primary symptom of a malfunctioning coolant flow switch is the cooling fan not activating when the engine reaches its operating temperature. If ignored, this can lead to the engine overheating, potentially causing severe damage to internal components. The ultimate risk is engine failure due to excessive heat.

Installation Tip

Ensure the engine coolant level is below the switch port before removal to prevent coolant loss. Do not force the switch into the port; it should thread in smoothly.

Service Note

Inspect the radiator and thermostat for proper function when replacing the coolant flow switch.