Crankshaft pulley torque

Hi all

To tighten the crankshaft pulley retaining bolt Haynes says torque to 100 nm then angle tighten in three stages, 60,60 and then 30 degrees. Is there a point to this or can I just do 150 degrees ? Some people have said that the tightness of the bolt holds the pulley on and does not need a key. This doesn't sound right.

Cheers

As you do the separate angles then you're "stretching" the bolt and on each angle application you're applyig a different torque each time

A one off 150 degrees won't give the same result

if there was no woodruff key in it then do not put another one in that is strait from LR.

Thanks for your quick replies and your info is much appreciated.

Cheers
Neil