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My thoughts.
The belt my be worn because the tensioner bearings have failed so badly that the Tensioner pulley was leaning causing the belt to rub. Or the Tensioner was not put on correctly at last Timing Belt change. There is a little tit in the back of the Tensioner assy that needs to fit in a hole in the Engine block. If it doesn't, it will angle the Pulley.
The Crank bolt should be Tight. They give a toque of 40 Ft lbs then 1/4 turn more. I bet that brings it up over 100 ft lbs. In MY opinion, this torque is not critical, you just want to make sure it doesn't loosen up for the next 50K miles. I use an Impact gun to take it off and put it back on. My gun has a few Settings. tight, tighter, real tight and F'n Tight. I set it to Real Tight and that works for me.
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'75 Jeep CJ5 345Hp ChevyPwrd, two motorcycles, '85 Pickup: The '89 Volvo is the newest vehicle I own. it wasn't Volvos safety , it was Longevity that sold me http://home.lyse.net/brox/TonyPage4.html
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