Okay guys and gals. I have an odd one here. I have a 2007 Cobalt with the 2.2 with 70k. The car was doing the famous tensioner rattle. I drove it to the parts store, got the new part, went to go home and no go. Long story short I pulled the valve cover and the chain has a LOT of play but isn't broke. The car sounded like the timing was way off when cranking it over. I pulled the head off expecting the worse but all looks great inside. Has anyone here ever seen a chain stretch or jump to the point that the car won't start with no internal damage?

Nobody has come across this before?