First I should come clean, the vehicle is not a peugeot, it is a 2002 fiat scudo van. However it is really a Peugeot Expert and has the PSA DW10CTED engine so I am hoping there are more experts here!
My problem is that I wanted to change the crank pulley as it was rattling but had a real job trying to remove the crank bolt. 5 minutes with a impact wrench working it back and forward. I was convinced it had been cross threaded but there is no sign of the expected damage or debris on the bolt. However there are signs that the pulley was loose - wear marks from the timing gear plus wear on the crank key.

So, some questions for the experts here:
- does this look like the right bolt? I am hoping someone hasn't run the wrong bolt into the crank. It is M14x1.5, 70mm long.
- Any other ideas on why it should be so tight? I was wondering but over used loctite but I have never had a problem with this once it is broken free.
- I am thinking of running a tap into the crank to clean it up. Sensible or not?
- finally, is this a stretch bolt? Does it need replacing? I have read both 110Nm and 70Nm+62degrees. Which is correct?
TIA, any advice gratefully received!