Abstract: A pre-oiling kit for an installation having a battery, an ignition switch, an internal combustion engine, an engine block and oil sump underlying the block, a port within the block leading to an oil gallery and a drain opening within the bottom of the sump, includes as a principal element of the kit; a container for mounting exterior of the block and housing a pre-oiler pump with an electric motor operatively coupled thereto, an oil pressure operated switch and an electrical relay. Two oil lines lead to the exterior of the container and are respectively connected to the inlet side of the pump through a strainer and from the outlet side of the pump through a check valve pressure switch and strainer.