Caterpillar original Caterpillar original Caterpillar 20R-4179 Diesel Engine Fuel Injector Common Rail 3600 3116 3114 4P-2995 4P-9075 184-2527 418-8820 224-9090 10R-1252 0R-3051 original new injector

The Caterpillar CAT 3116 Fuel Injector 20R-4179 is a remanufactured mechanical electronic diesel injector engineered for heavy-duty operation in demanding industrial environments. Built around high-pressure fuel delivery and precision atomization, this injector supports consistent combustion efficiency, stable idle quality, and reliable cold-start performance. Wear-resistant internal components, including coated plungers, contribute to extended service life, improved fuel economy, and sustained power output across long duty cycles in construction, marine, generator, and mining applications.

This 20R-4179 injector is suitable for the CAT 3116 engine series and is widely cross-referenced across the Caterpillar 3500, 3600, and C3600 engine families, including 3508, 3512, 3516, 3606, 3608, 3612, and 3616 models. Compatible OE and cross references include 20R4179, 418-8820, 224-9090, 184-2527, 137-4729, 6I-4401, 7E-5645, 7C-3854, 10R-1252, 0R-8575, 0R-6130, 0R-3815, and 0R-8465, allowing flexible replacement across multiple equipment platforms. Final fitment should always be confirmed by the original injector part number, engine serial number, and the Caterpillar parts book.

Every unit is flow-tested and performance-verified against Caterpillar reman specifications, incorporating critical engineering updates and strict quality controls before shipment. Export-ready packaging protects each injector from contamination and moisture during transit and storage. Proper maintenance practices — including clean diesel fuel, regular filter replacement, water separator draining, and return fuel flow inspection — help maximize injector life and reduce engine downtime in heavy equipment, marine auxiliary, generator set, and industrial engine service operations.