Big Bear Engine Company

Big Bear Engine Company supplies high-performance diesel engines, specializing in Cummins 4BT, 6BT, and Caterpillar 3306 models. Our Colorado-based operation offers new surplus motors, full-service remanufacturing, and machine shop services. We provide reman replacement assemblies, long blocks, and extended component build options. Our engines, matching OEM serial numbers, are ideal for various applications including 4BT Jeep Swaps and industrial use. With worldwide shipping, a 1-year unlimited miles warranty, and significant cost savings compared to dealers, our engines suit industrial equipment such as skid steers, dozers, loaders, wood chippers, and forklifts.