Hi, I am about to purchase a 2000 SeaRay with CAT 3196's. The engines were totally re-built in 2003, Main Bearings, Pistons, Rings. I am told that the boat currently have the "Series 3 Aftercoolers". Are these versions known to have solved the problems with the earlier series coolers? Should I be concerned about getting into these engines/aftercoolers, considering I plan to be diligent about monitoring and maintaining them?