CATFuel System

2128470 Nozzle Gp-Unit Injector — Cat 311C 312C

This unit injector nozzle group is a precision-engineered component within the fuel injection system, responsible for atomizing and delivering fuel directly into the combustion chamber at high pressure. It ensures precise fuel metering and spray patterns for efficient combustion and reduced emissions. Observable symptoms of a worn nozzle include rough idling, black smoke from the exhaust, and a noticeable decrease in engine power.

Nozzle Gp-Unit Injector – Part No 2128470 – CAT Spare Part
Part Specifications
BrandCAT
CategoryFuel System
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

Use clean, filtered fuel — fuel injection components have micron-level tolerances. Prime fuel system before cranking to avoid dry-start damage. Replace fuel filter whenever servicing injection components. Calibrate injectors after replacement if equipment has ECU.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeUnit Injector Nozzle Group
MaterialHardened steel alloy
ApplicationUnit injector fuel system
Service LifeReplace based on performance and emissions testing
CompatibilityOEM specification
ConditionNew — aftermarket

Failure Symptoms

Rough engine idling, accompanied by excessive black smoke from the exhaust, often indicates a worn or faulty injector nozzle. If ignored, the engine will likely experience a significant loss of power and increased fuel consumption. Continued operation with compromised injector nozzles can lead to incomplete combustion, potentially causing cylinder wash-down and increased wear on engine components.

Installation Tip

Ensure all sealing surfaces are perfectly clean before installing the new nozzle group to prevent fuel leaks. Do not reuse old sealing washers or O-rings, as they may not provide an adequate seal.

Service Note

Inspect the unit injector body and the associated fuel lines for any signs of wear or leakage when replacing the nozzle group.