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106
F1A ENGINE
Refitting cylinder head
Figure 209
Check that tool 99360619 (2) inserted in the hole (→) of the
oil vacuum pump assembly (1) blocks crankshaft rotation.
This condition is necessary for setting up the timing system
and to prevent the valves interfering with the pistons.
Figure 210
Check that the mating surfaces of the cylinder head and
crankcase are clean.
Keep the cylinder head gasket clean.
Position the cylinder head gasket (1) of the thickness
determined under the heading "checking piston protrusion"
with the lettering "TOP" facing the cylinder head.
NOTE
It is essential to keep the gasket sealed in its package
until just before assembly.
Base - March 2006
Figure 211
α
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Mount the cylinder head (1).
Screw down the fixing screws (3) and tighten them, in three
successive stages, following the order and methods shown in
the following figure.
NOTE
The angle closure is done with tool 99395216 (2).
Figure 212
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Diagram of the tightening sequence for the cylinder head
fixing screws:
st
- 1
phase: pre-tightening with torque wrench
•
screws 1-2-3-4-5-6 to a torque of 100 ±5 Nm;
•
screws 7-8-9-10 to a torque of 50 ±2.5 Nm.
nd
- 2
phase: angle closing
•
screws 1-2-3-4-5-6 90° ±5°;
•
screws 7-8-9-10 60° ±3°.
rd
- 3
phase: angle closing
•
screws 1-2-3-4-5-6 90° ±5°;
•
screws 7-8-9-10 60° ±3°.
A = flywheel side.
D
E
4
AILY
URO
75493
A
75494
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