CATEngine Parts

306-5618-3065618 Expansion Valve 306 5618 — Cat C15 D7E

This expansion valve is a crucial control device within the engine's thermal management system, regulating fluid flow to maintain optimal operating temperatures. It is manufactured to precise standards, ensuring reliable performance and preventing premature wear compared to a faulty original valve. Symptoms of a failing expansion valve include engine overheating or inconsistent temperature readings.

Expansion Valve 306 5618 – Part No 306-5618-3065618 – 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 TypeExpansion Valve
MaterialBrass and steel
ApplicationEngine thermal management system
Service LifeReplace every 2,000 hours or as needed
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first sign of a failing expansion valve might be a noticeable fluctuation in the engine temperature gauge. If ignored, the engine could begin to consistently run too hot or too cold, impacting performance and efficiency. Prolonged operation outside the optimal temperature range can lead to increased wear on engine components.

Installation Tip

Thoroughly flush the cooling system before installing the new valve to remove any sediment that could impede its function. Ensure the valve is oriented correctly according to the service manual to allow proper flow.

Service Note

When replacing the expansion valve, it is essential to inspect the radiator, water pump, and coolant hoses for leaks or blockages.