Join Date: Apr 2012
Location: CA central coast
Bike: 08 R6, 15 Ninja300
Re: HELP!! rattle then engine stopped wth?!?!
First, the tensioner is now garbage and needs to be replaced. That is the least of your worries. I don't think there is anything you can do now but pull the head and inspect the damage.
It's not clear weather you have been turning the engine by hand or with the starter, but a sudden stop and freezing is very bad news. Yes, it can still turn when the timing is off a little bit, but when the chain is freely skipping over teeth it will be likely to end up with pistons colliding with valves. At this point you may even have valves that are permanently open because they got bent or some other significant damage like that. You won't know how bad it is until you look inside.