2000 PORSCHE BOXSTER S Engine And Engine Cooling Problems

I WAS INTERESTED IN PURCHASING A 2000 PORSCHE BOXSTER S. I TOOK THE CAR TO A PORSCHE DEALER TO HAVE A PRE PURCHASE INSPECTION PERFORMED AND WAS NOTIFIED BY THE DEALERSHIP THAT THE 53,000 MILE CAR ACTUALLY HAD A FACTORY REPLACEMENT ENGINE INSTALLED FOR UNKNOWN REASON. I CONTACTED THE DEALERSHIP THAT ACTUALLY INSTALLED THE FACTORY REPLACEMENT ENGINE AND I WAS INFORMED THAT THE ENGINE WAS REPLACED AT 35,000 MILES FOR AN OIL LEAK. THE DEALERSHIP THAT PERFORMED THE INSPECTION REPORTED THAT A FEW MINOR ISSUES NEEDED TO BE ADDRESSED BUT OVERALL THAT THE CAR WAS IN EXCELLENT CONDITION. I TOOK OWNERSHIP OF THE CAR AND WITHIN 2,000 MILES OF MY OWNERSHIP, THE INTERMEDIATE SHAFT BEARING BOLT FAILED DESTROYING THE ENGINE. I HAVE BEEN IN CONTACT WITH OTHER PORSCHE BOXSTER OWNERS AND THIS PROBLEM IS VERY COMMON, EVEN ON ENGINES WITH 20,000 MILES ON THEM. AT THE MOMENT, THE ONLY FIX...