Beware! The 90 to 92 value given in step 5 IS NOT a torque wrench value, it is an angular value of 90 degrees to 92 degrees of arc using an angle measuring wrench or a common protractor.
The basic sequence for the tightening of the head bolts is as follows.
Oil the threads of the bolt and the underside of the cap of the bolt. Tighten bolts in sequence specified in manual.
Step 1, Tighten all head bolts to 19.6 to 23.52 Newton meters.
Step 2, Tighten all head bolts to 68.6 Newton meters.
Step 3, Loosen all head bolts completely.
Step 4, Tighten all head bolts to 19.6 to 23.52 Newton meters.
Step 5, Tighten all head bolts 90 to 92 degrees of arc from the position set in Step 4
This was paraphrased from the Nissan shop manual for K-21, K-25 engines.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.