Additional core charge of 1500.00 not included. Caterpillar 3126 Long Block Engine 64F8L072B. Serial Number 8YL, 7AS, CKM, 9SZ. 3126 Series, 3 Valve, 230 HP & up, 2 Piece piston, 1283883 Front Housing. Ordering Instructions: Provide Arrangement and Serial Number. Call us toll-free 1-800-282-9319 for ordering assistance and complete warranty information.