Hi Guys, I am trying to find the cause of early timing chain failures on the M271 cgi engine also known I believe as the M271 evo. This engine is said to have a redesigned chain tensioner but problems with the timing chain/tensioners are now occurring earlier (45,000 miles) than with the Kompressor engines, I am trying to ascertain whether the stop/start function is responsible for this earlier failure. My chain on startup is normal with no rattle at 41,000 miles, I disconnected stop on the first week of ownership. Has anyone had a timing chain/timing gear failure on this later engine, post Sept 2011 blueefficiency with stop/start, if so. 1, Did you predominantly have stop/start engaged and working, what was the year and mileage?. 2. Did you always turn the stop/start function to off, what was the year and mileage?.