Inspection and Cleaning of the Charge Air Cooler (CAC)

Good airflow through the CAC core is essential for proper engine cooling. The cores allow air passage, but form a barrier that tends to collect insects and airborne debris.

Inspect the CAC hoses for chafing and cracks that will allow an air leak. Replace the hoses as needed. Inspect the CAC for clogging or damage and clean and/or repair it if necessary. Soak the CAC with a non-corrosive degreaser such as Simple Green. Let the unit sit for several minutes to work through the CAC. Using low water pressure directed from the fan side of the radiator core, rinse the CAC; be careful not to damage or bend the fins. Depending on the condition of the CAC, this process may have to be performed several times.