01.8 Removal and Installation of Cylinder Head 352/352 A To Engine End No. 678 154 3 Oil threads of stud bolts and screw in. Important! Do not pour oil into the threaded holes. 4 Fit cylinder head nuts and tighten referring to tighte- ning diagram. 1 st lightening stage 60 Nm 2nd lightening stage 90 Nm 3rd tightening stage 110 Nm Note: Tighten cylinder head nuts for the first time to 120 Nm at the 3rdtigthening stage. From Engine End No. 678 155 5 Oil cylinder head bolts at the thread and at the head contact surface and screw in, Important! Do not pour oil into the threaded holes. Note: Only cylinder head bolts are stocked in the spare parts store.
The cylinder head bolts can be installed in engines with a lower engine end number. 6 Tighten cylinder head bolts according to tightening diagram. 1 st tightening stage 60 Nm 2nd lightening stage 90 Nm 3rd lightening stage 110 Nm Note: Tighten cylinder head bolts for the first time to 120 Nm at the 3rd lightening stage. 7 Install push rods. 8 Attach rocker arm brackets together with rocker arm shafts and rocker arms. Turn back valve adjusting screws and lighten rocker arm brackets. Tightening torques see 1.4/1. 4.116