According to the bible that is Haynes. It suggests that the bolts should be re-tourqed after a short period of time after the initial repair.
Is this just putting off replacing the gasket again???
I wouldn't believe everything in the bible gunner. The correct tightening procedure for a 200tdi for example is stage 1 - 40nm, stage 2 - 60 degrees, stage 3 - 60 degrees all in the correct sequence this is according to up to date Autodata who get their info from LR, re torquing is almost a thing of the past, manufacturers have usually modified the tightening procedure by now to avoid the need for it. If you re-torqued the example i've given then it would have been massively over tightened. The best thing to do is speak to manufacturer to get the correct sequence and torque settings and ask them if re torquing is necessary.
Riggaz