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Version 250
- Insert the timing chain guide sliding block.
- Insert the centring dowels between head and cylinder, ins-
tall the head gasket and the head on the cylinder. Lubricate
the stud bolt threading
- Tighten the nuts to the first pre-torque of 7±1 N-m
- Tighten the nuts to the second pre-torque of 10±1 N-m
- Make a 270° angle rotation
- To perform the above operations, follow the tightening se-
quence shown in the figure.
- Install the two screws on the timing chain side and tighten
at the prescribed torque.
N.B.
BEFORE INSTALLING THE HEAD, MAKE SURE THAT THE LU-
BRICATION CHANNEL IS CLEAN USING A COMPRESSED AIR
JET.
Locking torques (N*m)
Timing belt tightener support screw 11 ÷ 13
Version 250
Install the timing chain control pinion on the driving shaft
with the chamfering facing the introduction side.
- Insert the timing control chain on the driving shaft.
- Insert the tightener sliding block on the head side.
- Install the spacer with the fixing screw.
- Tighten the screw at the prescribed torque.
Locking torques (N*m)
Sliding block screw 10 ÷ 14 Nm
125
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