Rob R. wrote:The idler pulley bearings fail on the Duramax engines...usually by 80,000 miles or so.
Not as bad the Toyota 1ZZ engine in the Vibe we use to have. Nice little gutless engine that sounded like marbles rattling around at just under 40K miles. A $135 Dayco belt tensioner, a modified bolt and one aggrevated afternoon later I had a new belt and tensioner on that car. I replaced a Chevy Caprice tensioner once in about 20 minute with a $35 tensioner and it turns out the old one was still good anyway with well over 100K miles on it. Gotta love that superior foreign engineering.