- Tighten the nuts to an initial pre-torque of 9-11
Nm.
- Tighten up the nuts by rotating 270.0±5.0° with
crossed sequence.
- Fit the two screws on the outside of the timing
chain side and tighten them to the specified torque.
CAUTION
DO NOT PERFORM 270° IN ONE ROTATION. PERFORM
WITH THREE GRADUAL ROTATIONS, OBSERVING THE
SEQUENCE INDICATED ON THE STUD BOLTS.
N.B.
BEFORE INSTALLING THE HEAD, MAKE SURE THAT THE
LUBRICATION CHANNEL IS CLEAN USING A COM-
PRESSED AIR JET.
CAUTION
ALWAYS USE A NEW HEAD GASKET UPON REFITTING.
Locking torques (N*m)
Cylinder head nut (TIGHTENING) 9 to 11 (Tighten
to the prescribed torque and then proceed with 270.0°±5.0°
rotation) Screws fixing cylinder to crankcase 10.8
to 12.7
Refitting the rocker-arms cover
- Remove the cylinder head cover and tighten the
four clamping screws to the prescribed torque.
- Pay attention to the integrity of rubber gaskets,
replace them if necessary.
- Make sure the gasket is positioned properly.
Locking torques (N*m)
Head cover screws 10.8 to 12.7
Refitting the intake manifold
- Follow the disassembly process in reverse order to refit.
Engine Vespa LX - S 125 3V ie 150 3V ie (2012)
ENG - 160