CATEngine Parts

7n3521 Core As-Oil Cooler — Cat D6D D6E

This is the core for an oil cooler assembly, essential for regulating the temperature of the engine oil in CAT D6 series equipment, thereby protecting vital engine components from heat damage. Manufactured to meet stringent quality standards, this core provides efficient heat dissipation, unlike a clogged or damaged core that restricts oil flow and cooling capacity. Operators may notice a rise in engine oil temperature, increased risk of overheating, or a loss of engine power if this oil cooler core is failing.

Core As-Oil Cooler – Part No 7n3521 – 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 Core
MaterialAluminum or copper alloy
ApplicationEngine oil cooling system
Service LifeReplace as needed based on inspection
CompatibilityCTP aftermarket replacement
ConditionNew — CTP aftermarket replacement

Failure Symptoms

An initial symptom of a failing oil cooler core is a gradual increase in engine oil temperature, often indicated by the temperature gauge. If ignored, the reduced cooling efficiency can lead to oil breakdown and increased wear on engine components. The worst-case scenario is engine overheating, potentially causing severe internal damage and costly repairs.

Installation Tip

Ensure that all mating surfaces for the oil lines are perfectly clean and that new sealing washers or O-rings are used to prevent leaks. Do not overtighten the fittings, as this can damage the cooler core or the connections.

Service Note

Inspect the engine's oil filter and oil for any signs of contamination or metal particles that could indicate internal engine wear.