CATEngine Parts

3780509lK Piston — Cat

This piston is a fundamental component within the engine's combustion chamber, converting the pressure from burning fuel into mechanical motion. Manufactured to exact tolerances and high-strength material standards, it provides superior performance and longevity over worn pistons that exhibit reduced compression or scoring. Operators may notice a significant loss of engine power, increased oil consumption, or unusual engine noises when this part is failing.

Engine Component – Part No 3780509lK – 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 TypeEngine Piston
MaterialCast aluminum alloy
ApplicationEngine combustion chamber
Service LifeReplace based on engine overhaul or performance issues
CompatibilityCAT 3406B, 3406C
ConditionNew — OEM specification aftermarket

Failure Symptoms

A failing piston may initially cause subtle symptoms like a slight decrease in engine power or a faint knocking sound. If ignored, this can progress to noticeable smoke from the exhaust, increased oil consumption, and rough engine operation. Continued operation risks severe engine damage, including potential piston seizure or connecting rod failure.

Installation Tip

Always ensure the piston rings are installed with the correct orientation and end gap spacing as per the service manual. Never force a piston into the cylinder; it should slide in smoothly with proper lubrication.

Service Note

When replacing pistons, it is essential to inspect and measure cylinder liner wear and replace connecting rod bearings.