Ok.. will type this up better later...

AT ONE POINT IN TIME retorqueing of the head bolts was called for .. at 1000-1500 Km...or after repairs at 100-150 km...

With the newer head bolts and the improved head gasket that requirement has been eliminated...

ONLY the later head socket bolts are tightened first to a torque unit THEN added rotation added... which can be determined by the style of the bolt head...

Earlier head bolts were only torqued to specified values.. ( no added rotation ).
which called for doing it in two steps and waiting 10 minutes until the final torque was applied...