NHTSA Complaint #10724111 — 2009 MINI COOPER S

THE PROBLEM OCCURRED WHEN THE TENSIONER FOR THE TIMING CHAIN NO LONGER APPLIED PRESSURE TO THE GUIDE RAIL. THIS CAUSES THE TIMING CHAIN TO FLAP AGAINST THE THE GUIDE RAILS EVENTUALLY BREAKING THEM. THERE WAS A NOISE THAT WAS CREATED HEARD DURING COLD START UP AND EVENTUALLY WENT AWAY WHEN THE ENGINE GOT WARM. THE ITEMS REPAIRED WERE A FAULTY CHAIN TENSIONER, TIMING CHAIN, CHAIN GUIDE RAIL, BEARING BOLT, BEARING BOLT GASKET, CRANK SHAFT SPROCKET, CRANKSHAFT PULLEY BOLT, VALVE COVER GASKET, PERMATEX HYLOMAR GASKET MAKER, SERPETINE BELT, SOLENOID, AND VANOS. THIS ISSUE APPEARED WELL BEFORE BMWS SUGGESTED MAINTENANCE PERIOD OF 120,000 MILES, OR 10 YEARS.