CATEngine Parts

2977755 Piston As-(Os 0.50Mm) — Cat 311C 312C

This is an oversized piston assembly, designed to restore compression and performance in an engine cylinder that has experienced wear beyond standard limits. Manufactured to precise dimensional tolerances, it ensures proper sealing and combustion efficiency, unlike a worn or damaged piston. Operators might notice a loss of engine power, increased oil consumption, or rough running, particularly under load, if the original piston is compromised.

Piston As-(Os 0.50Mm) – Part No 2977755 – 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
MaterialAluminum Alloy
ApplicationEngine cylinder
Service LifeReplace as part of engine overhaul
CompatibilityOEM specification
ConditionNew — CTP aftermarket replacement

Failure Symptoms

A worn piston may initially cause a slight decrease in engine power and a subtle increase in exhaust smoke. If the condition worsens, oil consumption will rise significantly, and the engine may begin to run rough or misfire. Continued operation risks scoring the cylinder walls and damaging the crankshaft.

Installation Tip

Ensure the cylinder bore is properly honed to the correct size and finish for the oversized piston. Always install new piston rings and lubricate the piston skirt and rings generously before insertion.

Service Note

Replace piston rings, connecting rod bearings, and inspect cylinder liners when installing new pistons.