🔍 Key Concepts

• Fuel injector nozzle construction and what the spray holes are made of • Risk of damaging or enlarging spray holes during cleaning • Manufacturer recommendations for non-metallic vs metallic tools on precision orifices

💭 Think About

• Which option would avoid scratching, scoring, or enlarging the very small, precisely machined spray holes? • If a tool is harder than the metal of the nozzle, what kind of damage could that cause over time? • In routine maintenance, what type of material is usually preferred for cleaning delicate precision openings?

✅ Before You Answer

• Verify which choice uses a softer material than the injector nozzle metal • Eliminate any option that could change the size/shape of the spray holes • Consider which method is commonly recommended in engine manufacturer maintenance manuals for injector tips