Additional core charge of 3000.00 not included. Caterpillar 3126 Complete Drop-In Engine 64G2D250SB. Serial Number HEP. 3126, 3-Valve, 230-up HP, Freightliner. Ordering Instructions: Provide Arrangement and Serial Number. Call us toll-free 1-800-282-9319 for ordering assistance and complete warranty information.