The following is from an old 90 ranger shop manual:
4.0L V-6..... tightened in stages and in sequence.
1) torque to 44 ft. #
2) " 59 "
3)rotate head bolts 80 to 85 degrees.
That last one is strange!!!!!
Sequence:
5 1 3 7
6 4 2 8
Now it also says to torque the lower intake manifold at the same time to ensure proper fit & gasket crush.
1) 3-6 ft #
2) 6-11 ft #
3) 11-15 " and then 15-18 Ft #
Sequence:
2 4
7 8
5 6
3 1
So in a "nut-shell":
Heads first stage, then intake first stage, then heads, then intake, then heads, then intake and intake again.
Don't forget a dab of silicone in the 4 corners of the intake to head mating surfaces both before and after setting the intake maniflod (valley pan) gasket in place.
Hope this info helps.
Bill M.
