The closed-loop supply chain of an aluminum enginemanufacturing operation is investigated. The push for therecycling of aluminum components in auto industry ismotivated by profit incentives (i.e., the recovery of avaluable resource) as well as by legal obligations (i.e., tocomply with the requirements of the Extended ProductResponsibility legislation), which have, therefore, givenrise to the development of closed-loop supply chains. Thepaper presents a planning model for the closed-loopprocess that includes purchasing, production, and end-oflifeproduct collection and recycling/ remanufacturing inthe context of an aluminum engine manufacturing andrecycling operation.The model is a multi-echelon general integer linearprogram with the objective of minimizing the total costsin the network subject to structural and functionalconstraints. The model may be employed to makedecisions regarding raw material procurement,production, recycling and inventory levels, and thetransportation activities in the network.