As I mentioned in my earlier post are you using 13.5 to 16.5 lb ft as a final torque value? The bolts will not stretch and seal the head gasket if you don't complete sequence.
Mark bolts. Turn 85-95 degrees in the tightening sequence.
Tighten the bolts 85-95 degrees one more time to complete the bolt stretching procedure.
Clifton
Mark bolts. Turn 85-95 degrees in the tightening sequence.
Tighten the bolts 85-95 degrees one more time to complete the bolt stretching procedure.
Clifton