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New emission regulations require innovation in the engine intake air loop. To satisfy these requirements, new architectures of cooling systems are in the process of development. These systems use valves to regulate the exhaust gas pressure and distribution in the intake cooling loop and ultimately combustion chambers. Since lower pressure is involved in the Exhaust Gas Recirculation (EGR), Water Charge Air Cooler (WCAC) or Air Charge Air Cooler (ACAC), the condensation of exhaust gas takes place and very acidic solutions are generated. In the absence of such new architecture of cooling system in service and in order to evaluate the corrosion risk that the acidic solutions from exhaust gases condensate could create in the EGR system, several tests have been proposed as representative for simulation of service conditions.