CATEngine Parts

212-8470 Original Nozzle Gp Unit Injector — Cat 320C 320D

This is a CAT Original Nozzle Group Unit Injector, a critical component of the engine's fuel system responsible for precisely delivering fuel into the combustion chamber. It integrates the fuel pump and injector, ensuring accurate timing and atomization for efficient combustion. A worn or faulty injector may cause incomplete fuel delivery, unlike this new unit which restores optimal spray patterns and fuel volume. Observable symptoms include rough idling, a significant loss of engine power, increased exhaust smoke, and potential engine misfires.

Original Nozzle Gp Unit Injector – Part No 212-8470 – 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 TypeUnit Injector
MaterialSteel and Brass
ApplicationEngine Fuel System
Service LifeReplace based on performance issues or 3,000 hours
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first sign of a failing unit injector is often a rough or uneven engine idle, accompanied by a noticeable loss of engine power. If left unaddressed, the issue can progress to persistent engine misfires, excessive black smoke from the exhaust, and increased fuel consumption. Continued operation with faulty injectors risks uneven cylinder wear and potential damage to the engine's emission control system.

Installation Tip

Ensure the injector bore in the cylinder head is perfectly clean and free of any carbon buildup before installation. Avoid forcing the injector into place; it should seat smoothly with minimal pressure.

Service Note

When replacing unit injectors, it is highly recommended to also inspect and clean the engine's fuel filter and fuel lines for any debris.