The removal and replacement of the head bolts does require a specific procedure. If you look below, I provided the directions for replacing the head gasket. The directions explain the timing procedure, bolt sequence loosening and tightening, torque specs, and so on.
Take a look through them and let me know if you have questions or if I can help.
See pics below.
Images (Click to enlarge)
Thursday, May 19th, 2022 AT 8:30 PM