Well, OK, let's look at the Yanmar Service
Manual for GM Marine Diesel
Engines, which should be pretty definitive for us here. The last four pages are packed with fine print, detailing torque settings for all the bolts and pipe threads and things, and the last page is labelled "Packing Supplements and Adhesive
Application Points", telling us where to put anti-seize and thread locker. Excerpts....
Cylinder Head Intake and exhaust
manifold bolt threads "Screw Lock Super 203M"
manifold stud bolt thread "Screw Lock Super 203M"
Rocker arm support stud bolt (Nothing)
Cylinder Block Cylinder head bolt stud (Nothing)