10R-8502 Remanufactured Fuel Injector for CAT C15

This remanufactured fuel injector assembly, carrying the OEM part number 10R-8502, serves as a direct replacement for Caterpillar 3406E, C15, and C16 diesel engines. Each unit undergoes a rigorous core rebuild process where critical wear components-including the nozzle tip, control valve, spring, and O-rings-are replaced with new parts, restoring fuel delivery characteristics to meet or exceed original specifications. For diesel repair shops and parts distributors seeking a cost-effective alternative to new OEM injectors, this unit delivers consistent performance without sacrificing reliability.

The 10R-8502 replaces the previous part number 10R-0958 and corresponds to the new OEM number 211-3024 . This injector belongs to the Type 3 / "58" series flow category, meaning it delivers approximately 3.107 kg/min of fuel flow-a measurable increase over the "57" series injectors . The unit ships individually and carries a 12-month warranty against manufacturing defects. Each injector is bench-tested for pressure, leakage, fuel output, and electrical timing before leaving the facility .

This injector fits Caterpillar 3406E, C15, and C16 engine platforms produced between 1994 and 2003, identifiable by serial number prefixes 5EK, 6TS, 6NZ, and 9NZ . Common chassis applications include the Freightliner FLD120, Kenworth T800, Peterbilt 379, and Western Star 4900 equipped with these powertrains. The 10R-8502 is frequently specified in 500–550 HP highway truck configurations and can support higher horsepower builds when paired with appropriate turbocharger and ECM tuning .

Proper installation begins with verifying the engine serial number prefix to confirm injector compatibility. Before removal, technicians should perform a cylinder cutout test and record injector balance rates to establish a baseline for post-repair comparison. The injector height must be set using the correct gauge and procedure-failure to do so results in improper fuel spray penetration, poor combustion, and potential piston damage. New injector cup O-rings and sealing washers should always accompany replacement. After installation, trim codes must be programmed into the ECM; otherwise the engine will exhibit rough running, misfires, and poor fuel economy .

For diesel repair shops and fleet maintenance departments, the 10R-8502 remanufactured injector bridges the gap between new OEM cost and low-quality aftermarket risk. Core returns are standard practice, with refundable core deposits enabling immediate shipment on time-sensitive repairs . The 12-month warranty covers parts replacement, reducing comebacks and protecting shop reputation. Unlike generic alternatives, this unit undergoes new component installation rather than simple cleaning, ensuring consistent fuel atomization and long service intervals matching the demands of heavy-duty haulage and vocational truck applications .

Q1: What trim codes do I need for the 10R-8502 after installation?
A: The ECM requires the specific trim code provided with each injector. Without entry, the engine defaults to a generic fueling map, causing cylinder imbalance, smoke, and reduced power. Always request trim codes from your supplier before installation.

Q2: Can I install the 10R-8502 without recalibrating the ECM?
A: No. The ECM must recognize the new injector flow characteristics via trim code programming. Running without calibration risks over-fueling, elevated EGTs, and piston washdown.

Q3: How does the 10R-8502 differ from the 10R-0958 I removed?
A: The 10R-8502 is the current remanufactured replacement for the 10R-0958 core number. Flow output is identical, but the 10R-8502 benefits from updated rebuild processes and new wear components .

Q4: What core deposit applies, and when is it refunded?
A: Core deposits range from $190 to $222 per injector depending on the vendor . The full amount is refunded after the core passes inspection for reusability.

Q5: Is this injector suitable for marine or industrial C15 applications?
A: Yes, provided the engine serial prefix matches 5EK, 6TS, 6NZ, or 9NZ and the existing calibration aligns with 3.107 kg/min flow. Marine and industrial ratings may require ECM verification before ordering.