3
130
E
N
G
IN
E ASS
E
M
B
LY AN
D CO
NTRO
LS
Tightening order of camshaft support screws.
Checking valve play with thickness gauge.
Tighten the seven screws by hand until they are
flush. Check the correct position of the camshaft
bearings (par. 3.17.7).
Proceed with tightening in two moments, following
the order indicated in the figure. Carry out the first
tightening operation at a torque of 8Nm and the
second at 10Nm. At the end of this operation, make
sure the camshaft moves freely.
Iv
II
III
v
vII
I
vI
A
3.17.17 VALVE PLAY
Checking for valve play must be carried out by pla
-
cing a thickness gauge
A
(code 006140210000)
in
between the cam and the finger follower. This con
-
trol can be done even without the hydraulic tensio
-
ner coupled to the engine.
Attention:
The piston must be positioned at the Top Dead Cen
-
tre (par. 3.7)! Following the order of this text, this
position is already fixed.
Play must be within the values carried on the table
below.
If the play measured is greater than that indicated,
the calibrated disc must be replaced with a thicker
one. On the contrary, if the valve play is less than
that indicated, replace the calibrated disc with a
thinner one.
The value of the needed thickness can easily be as
-
sessed by calculating the difference between the
detected play value and the one required.
The following is a layout for calibrated disc repla
-
cement.
Side
Minimum
[mm]
Maximum
[mm]
Intake
0,10
0,175
Exhaust
0,125
0,20
5Nm 10Nm
