Flywheel bolt torque?

[harryrcb]

Originally Posted by JFP in PA

There are not two procedures, there are two stages; for the flywheel bolts (new only, do not reuse), torque to 19 ft lb, then tighten another 120 degrees of rotation to gain the correct bolt stretch. For the pressure plate, torque to 17 ft lb.

Hi JFP, just a quick question, I know the bentley book says 120 but in my Porsche manual it says 18 and 90 - why the difference and which is right?