Caterpillar original Caterpillar 10R-8502 fuel injector replacement for OEM common rail diesel engine new injector original new injector

The 10R-8502 electronic unit injector is engineered as a direct OE-style replacement for Caterpillar C15, 3406E, and C16 heavy-duty diesel engines commonly found in long-haul trucks, construction machinery, mining equipment, and industrial power units. Designed for installation in the cylinder head injector position, this unit supports engines with ESN prefixes including 1LW, 2WS, 5EK, 6NZ, 6TS, and MBN, covering model years from 1995 through 2003. The injector delivers precise high-pressure fuel atomization through electronic unit injector control, ensuring accurate fuel metering and timing for smoother combustion and reduced engine downtime.

Built with durable metal construction and remanufactured to meet OE performance expectations, the 10R-8502 is flow-matched and leakage tested to provide balanced fuel delivery across all cylinders. Each unit is response-tested to confirm consistent solenoid operation and spray pattern quality, supporting reliable repair performance in demanding operating environments. Cross-referenced with multiple Caterpillar part numbers, the injector offers flexible compatibility for distributors, fleet operators, and engine rebuilders seeking verified replacement options.

For optimal service life, fuel filters should be replaced at recommended intervals, the water separator drained regularly, and the fuel tank kept free from rust, sediment, and microbial contamination. ECM fault codes and cylinder contribution testing should be performed when rough idle, hard starting, excessive smoke, or loss of power is observed. Replacing injectors as a complete matched set is recommended to maintain balanced fuel delivery and consistent exhaust performance across the engine.