CATEngine Parts

3109269 Piston As — Cat 420e 430e

This piston assembly is a critical component of the internal combustion engine, responsible for converting the pressure from expanding gas into rotational motion. It is manufactured to meet stringent quality standards, ensuring superior durability and performance compared to a worn or damaged piston. Operators may notice a loss of engine power, increased oil consumption, or unusual engine noises when this part begins to fail.

Piston As – Part No 3109269 – 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
MaterialCast Aluminum Alloy
ApplicationInternal Combustion Engine
Service LifeReplace based on engine overhaul schedule
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of a failing piston assembly include a noticeable decrease in engine power and a rougher idle. If left unaddressed, the issue can progress to increased exhaust smoke and potential engine misfires. Continued operation with a compromised piston can lead to severe internal engine damage.

Installation Tip

Ensure the cylinder bore is thoroughly cleaned and free of any debris before installing the new piston. Avoid forcing the piston into the cylinder bore, as this can damage the piston skirt or the cylinder wall.

Service Note

When replacing a piston assembly, it is recommended to inspect and replace the piston rings and connecting rod bearings.