CATEngine Parts

3938990lK Crown As- Piston — Cat

This crown assembly for a piston is a precision-engineered engine component that forms the combustion surface within the cylinder, directly impacting engine power and efficiency. It is manufactured to meet strict OEM quality standards, offering superior heat resistance and structural integrity compared to a worn or damaged piston crown that may show signs of pitting or cracking. Operators might experience reduced engine power, increased fuel consumption, or rough running if this piston crown assembly is compromised.

Engine Component – Part No 3938990lK – 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 TypePiston Crown Assembly
MaterialForged Aluminum Alloy
ApplicationEngine Cylinder (Piston)
Service LifeEngine overhaul interval
CompatibilityCAT C-16 Engine
ConditionNew — OEM specification aftermarket

Failure Symptoms

Early signs of a failing piston crown may include a noticeable decrease in engine power or an increase in exhaust smoke. If the damage progresses, the engine may begin to run rough, misfire, or exhibit increased oil consumption due to blow-by. Continued operation with a compromised piston crown risks severe internal engine damage, potentially leading to complete engine failure.

Installation Tip

Ensure the cylinder bore is clean and properly lubricated before installing the piston assembly to prevent scoring. Always use new piston rings and follow the manufacturer's specified ring end-gap and lubrication procedures.

Service Note

Inspect the cylinder liner, connecting rod, and valves for wear or damage when replacing a piston crown assembly.