CATEngine Parts

2881394 Piston As-(Os 0.50Mm) — Cat 312D2 312D2 GC

This is an oversized piston assembly, measuring 0.50mm larger than standard, designed for engine cylinder repair and performance restoration. It is manufactured to meet strict dimensional and material specifications, ensuring a precise fit and reliable sealing compared to a worn or standard-sized piston. Operators may observe increased oil consumption, blue exhaust smoke, or a loss of engine compression when this oversized piston is required or fails.

Piston As-(Os 0.50Mm) – Part No 2881394 – 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 (Oversize)
MaterialAluminum alloy
ApplicationEngine cylinder
Service LifeReplace as needed during engine overhaul
CompatibilityOEM specification
ConditionNew — CTP aftermarket replacement

Failure Symptoms

Symptoms of a failing or incorrectly sized piston include increased blue smoke from the exhaust and a noticeable drop in engine power. If ignored, oil consumption will escalate, and engine compression will continue to degrade, potentially leading to engine misfires. Continued operation risks severe cylinder wall and crankshaft damage.

Installation Tip

Ensure the cylinder bore is honed to the correct surface finish for the oversized piston and rings. Never install a piston without new rings, and ensure they are properly gapped for the cylinder bore.

Service Note

Always replace piston rings, connecting rod bearings, and inspect cylinder liners when installing an oversized piston.