CATEngine Parts

3687816PK Body As-Piston — Cat 320C 320D

This piston body assembly is a crucial internal engine part that forms the combustion chamber's base and transmits the force of combustion to the crankshaft via the connecting rod. It is engineered for high-temperature and high-pressure environments, ensuring efficient power transfer and durability. A damaged or worn piston body can lead to loss of compression, increased oil consumption, or knocking sounds.

Engine Component – Part No 3687816PK – 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 Body Assembly
MaterialCast aluminum alloy
ApplicationEngine cylinder
Service LifeReplace as needed based on engine diagnostics
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Early signs include a noticeable decrease in engine power, increased exhaust smoke, or a distinct knocking sound from the engine. If left unaddressed, the piston can score the cylinder wall, leading to severe oil consumption and reduced compression. The worst consequence is potential piston seizure, causing catastrophic engine damage.

Installation Tip

Ensure the cylinder bore is clean and properly lubricated before inserting the piston assembly to prevent initial scoring. Always install new piston rings and ensure they are correctly gapped and oriented.

Service Note

Inspect the cylinder liner for wear or scoring, and replace the connecting rod bearings and bolts when replacing the piston.