Restricted Oil Coolers

The coolant side of 6.0L engine oil coolers become restricted by rust and particle fallout from degraded coolant. Since coolant flow from the oil cooler directly feeds the EGR cooler, restrictions reduce the EGR cooler's capacity to remove heat stressing the cooler and typically leading to its failure. New engine control programming is designed to detect oil cooler restrictions in an effort to reduce EGR cooler failures.