Abstract: The present invention relates to multiple integrated fluid passages for a internal combustion engine which allow for economical and convenient means for routing fluids in relation to an engine block. For example, the molded passages of the present invention allow coolant to be applied directly to areas needing heat transfer, without requiring the provision of large areas in the engine block to accommodate such cooling fluid. Also, the molded passages of the present invention do not require circular internal passages, so that space-critical items can receive proper distribution of fluid. Also, the molded passages of the present invention allow for economical velocity control of fluids by controlling the sizes of the fluid passage. In a preferred embodiment, the molded passages are formed in a clam shell configuration having an open side and are attached to an exterior surface of the cylinder block, thereby forming an enclosed pathway for fluid flow.

Abstract: An oil pan casting for an internal combustion engine having an integrated suction tube formed therein. The suction tube housing is cast as a separate piece, and then affixed to the interior of the oil pan in a clamshell configuration. The interior surface of the oil pan therefore forms a portion of the suction tube enclosure.