Sources Sought DEPT OF DEFENSE is seeking Engine Block, Diesel. This item is typically used for manufacturing diesel engines and components. The proposed action is to award a new contract with an option for Engine Block, Diesel. Renk America, LLC is the sole source for this item due to their technical and engineering expertise. The Government does not have the necessary technical data for competitive procurement. Qualification testing and evaluation is required to become an approved source. Please note that this notice is not an open solicitation. For more information, visit the Source Approval Program website.