CATEngine Parts

257-5003 Oil Cooler — Cat D6N

This is a CAT Oil Cooler, responsible for dissipating heat from the engine oil to maintain optimal operating temperatures. It is built to OEM quality standards, ensuring efficient heat transfer and long service life, unlike a clogged or leaking cooler. Operators may observe a rise in engine oil temperature warnings, a decrease in engine power, or visible oil leaks from the cooler assembly when it is failing.

Oil Cooler – Part No 257-5003 – 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 TypeOil Cooler
MaterialAluminum, Steel
ApplicationEngine Oil Cooling
Service LifeReplace based on inspection and performance
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

An initial symptom of a failing oil cooler is a noticeable increase in engine oil temperature readings. If ignored, this can lead to oil breakdown, reduced lubrication effectiveness, and potential engine component damage due to overheating. Continued operation risks severe internal engine damage.

Installation Tip

Ensure all oil passages are completely flushed and clean before installing the new oil cooler to prevent immediate blockage. Do not overtighten the mounting bolts, as this can distort the cooler housing and cause leaks.

Service Note

When replacing the oil cooler, it is crucial to inspect the engine oil filter and the oil pan for any signs of internal damage or debris.