CATEngine Parts

1979297 Crown As- Piston — Cat 12H 330C

This is a CAT Crown As-Piston, a critical component within the engine's piston assembly responsible for maintaining proper cylinder sealing and combustion efficiency. It is manufactured to meet stringent OEM quality standards, ensuring superior durability and performance compared to worn or damaged pistons that can lead to reduced power and increased oil consumption. Operators may notice a loss of engine power, increased exhaust smoke, or abnormal engine noises when this part begins to fail.

Crown As- Piston – Part No 1979297 – 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 Assembly Component
MaterialCast Aluminum Alloy
ApplicationEngine Piston Assembly
Service LifeReplace as needed based on engine condition
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of a failing piston crown may include a subtle decrease in engine power and a slight increase in oil consumption. If left unaddressed, the issue can progress to noticeable engine misfires, excessive exhaust smoke, and increased internal engine temperatures. Continued operation with a compromised piston can lead to accelerated wear on cylinder walls and other internal engine components.

Installation Tip

Ensure the cylinder bore is thoroughly cleaned and inspected for any imperfections before installing the new piston crown. Avoid forcing the piston into the cylinder bore, as this can damage the piston skirt or the cylinder wall.

Service Note

Inspect cylinder liners, piston rings, and connecting rod bearings for wear or damage when replacing the piston crown.