Engine Long Block Short Block. NEW Engine OIL PUMP FITS 15L CUMMINS ISX ISX15 ISZ13 2881757 4309500 4955954. 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.