50
Fig.51
——Install new cylinder head bolts and washers into bolt holes, screw in by hand.
——Tighten cylinder head bolts in four steps in the order as diagram specified.
Step 1
：
Tighten to 20—40Nm Step
2
：
Tighten to 40—60Nm Step
3
：
Rotate 90
°
Step
4
：
Rotate 90
°
During rotating, torque-angle torque wrench or line plotting methods may be applied.
3.
Rocker arm mechanism and hydraulic lifting rod removal and installation Rocker arm mechanism
：
removal
：
——Loosen rocker arm nuts
，
remove nuts.
——Remove rocker arm supports.
——Remove rocker arms.
——Remove rocker arm support shims.
——Put each group of rocker arm and rocker arm support into the same plastic bag for
reference
，
rocker arm nuts are not permitted to reused after removed.
Fig.52
