as said above that bit of metal is from the bottom pulley.
Mine did exactly the same when mine went.
But when the bottom pulley goes it doesn't run true so i would think that is what's caused the belt to jump a notch over.
Here is a diagram of the belt lay out on a HDI with aircon, if yours does not have aircon then it is slightly different.
Mine did exactly the same when mine went.
But when the bottom pulley goes it doesn't run true so i would think that is what's caused the belt to jump a notch over.
Here is a diagram of the belt lay out on a HDI with aircon, if yours does not have aircon then it is slightly different.