ANYONE HAD PROBLEMS WITH MBE900 EGR COOLER GOING BAD? JUST CURIOUS IF ANYONE WHO HAS A MBE900 HAS HAD ANY PROBLEMS WITH EGR COOLERS. HAD ONE GO BAD AT 70k AND AGAIN @ 140K. SEEMS TO BE A 70k MILE PROBLEM. EGR COOLER LEAKS COOLANT INTERNALY. BOTH REPAIRS UNDER WARRANTY. PARTS WERE ABOUT $2K. WILL BE EXPENSIVE WHEN NOT UNDER WARRANTY. I AM TRYING TO ESTABLISH IF THIS IS A WIDE SPREAD PROBLEM WITH THIS PARTICULAR ENGINE.