Engine Long Block Short Block. New Extended Complete OEM DCEC Cummins POWER UNIT 125HP 3.9L 4BTAA AfterCooler. Need air to water cooler. This is Extended Long block is meant to be used in conjunction with existing failed engine. New Cylinder Head. New Camshaft and Lifters. New Connecting Rods. New Rocker Assemblies. New Gaskets, Liners, Rings, Seals, Wrist Pins, Bearings. New Bosch Fuel Pump. New Oil Pump and Water Pump. New Oil Cooler. New Oil Filters. New Oil Pan. New Intake and Exhaust Manifolds. New Housings (Front and Rear). New Brackets and Pulleys. New Fuel Transfer Pump. New Holset Wastegate Turbo. Extended Long block is meant to be used in conjunction with existing failed engine. Please Check Picture Carefully Before Order, you can get as same as Picture. For Replace old Engine only, an old VIN or Engine Number are necessary. Fuel Pump, Alternator, Turbo are suppied seperately, if you don’t know how to Install, please find a mechnical people to help. Please Contact before order. Before Start Engine you need to do. Change the oil filter with new one. Fully fill oil filter with lub oil before spin it on. 3 Open all valve covers and oil all rock arm. 4 Check oil dipstick to make sure oil level correct. 5 Disconnect fuel lines and electronic power. 6 Rotate engine by hand at least 5 rounds. 7 Keep the fuel shutdown rotate engine with electronic motor 30 seconds each time, 3 times at least. 8 Check oil pressure gauge when rotating engine. If no pressure, check oil pump and lubricate it with oil. 9 Keep on checking oil pressure when you start engine. 10 Keep engine idle at least 5 mins when starting engine. This product is available for international sales and is not located within the United States. The count starts from the day after you placed your order and excludes weekends and holidays. We are subject to labor law regulations that restrict weekend sales services. All the warrantee Are Limited in Parts Only, engine rotation is very Danger, to be safe when the engine running all the people must keep distance at least 10 feet away from engine rotation radius, any time the shut down valve must be active, keep your engine can be stop any time.