High-quality diesel fuel injector specifically designed for optimal performance and fuel efficiency in C15 Diesel Engine. Part number: 3594020

Please refer to the "Step-by-Step Installation Guide" on our product details page for detailed installation instructions.

The installation environment must be dust-free; lubricate the O-ring with clean machine oil before installation to prevent cutting; ensure the O-ring is installed correctly.

This is common due to air trapped in the high-pressure oil rail. Cycle the engine in short bursts (no more than 30 seconds) to purge air. It may take several attempts to stabilize pressure.

If unsure about compatibility, send us your Engine Serial Number (ESN) for free verification.

• Cylinder Cut-out Test: Using diagnostic software (ET), shut off cylinders one by one and observe engine speed fluctuations
• Fuel Rail Pressure Test: Check for internal leaks preventing system from building critical starting pressure
• Back-leakage Test: Excessive back-leakage indicates severe wear of internal control valve assembly
• Visual Inspection: Inspect fuel injector nozzles for carbon buildup, blockage, or corrosion

Delivery time depends on your country, region, and customs clearance. Contact us with your address and postal code for shipping costs and estimated delivery time.

HEUI (Hydraulic Electronic Unit Injection) systems are extremely sensitive to contamination. A single speck of dust can cause premature failure.

• Preparation: Clean the injector bores thoroughly. Ensure no carbon debris, old O-rings, or fuel/oil residue at the bottom of the seat. Inspect the injector sleeve for pitting or erosion.
• Lubrication: Apply clean engine oil to the three O-rings and backup rings. Never use grease - only clean engine oil ensures seals slide in without tearing.
• Seating the Injector: Push the injector down firmly by hand until you feel it "seat." Install the hold-down clamp and bolt.
• Torque Specifications: Tighten the bolt to 30 N⋅m±7 N⋅m (22 lb-ft). Note: Over-tightening can crack the injector body; under-tightening causes combustion gas leakage.
• Trim Code Programming: Locate the 6-digit alphanumeric code on the top of the injector solenoid. Use ET (Electronic Technician) software to program this code into the ECM for precise fuel delivery synchronization.