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VALVE GEARING
nmlng
dm
Timing
data (referred to the clearance of 1,5 mm
between rocker and valve) are the following (see
fig,
260)
.
Inlet:
-
opens 20' before
T.O.C.
-
closes 52' after
B.D.C.
Outlet:
-
opens
52"
before B.D .C.
-
closes 20' after
T.O.C.
Working clearance on a cold engine: mm 0,22.
o
OF CAMSHAFT BEARING AND HOUSINGS
IN
CRANKCASE
CAMSHAFT SEAR
I
NG
HOUSINQ IN CRANKCASE
FITTING
CLEARANCE
Valve gearing
~ide
47,000 -:- 46,984
47,025
-+-
47,050
0 ,025
-+-
0 ,066
Flywheel
side
32,000 -:- 31 ,984
32,025
-;-
32,050
COUPLING DATA OF TAPPETS AND GUIDES ON CRANKCASE
11
0 OF GUIDE
Original
22,021 -;- 22,000
0 ,05 mm oversize
22,071 -;- 22.050
0,10
mm oversize
22,121
.;-
22,100
FITTING OF CAMSHAFT ASS. Y,
After fitting the oil pump and the chain tensioner
proceed as follows
:
-
Fit
the camshaft
..
A .. fig. 261 into the crank·
case housings and secure it to the crankcase
using flange
..
8
..
fig.
261 then lock the screws
with toothed washers
..
C
..
fig. 261
.
-
Fit
the gears
with mounted
chain
" D,. fig.
261
onto: camshaft. crankshaft and oil pump control
shaft. paying
attention to
the alignment of the
reference
marks
..
E.
fig. 261 indicating that the
engine is timed (valve gearing); then fit
the
stop
pin
«F.
fig
.
261 into the holes of gear
"
G ..
fig.
261
and camshaft «H
.. ;
pay attention also to the key
hollow
on the engine pinion .. I,. lig. 261.
-
Lock
the
nut
with toothed washer
..
M
..
fig
.
261
securing the gear to the
camshaft.
using holdfast
tool n. 14927300 (20 fig
. 262)
and wrench
189276 SO (60 fig. 262) for the nut 27 or wrench
14927600 for the nut 26.
-
Lock the ring with washer .. M,.
fig.
261 secu·
ring engine pinion to the
crankshaft.
using
hold-
fast tool 14927300 (fig. 263) and special wrench
189276 SO (60 fig. 263) bend then one washer
wing into a
ring
hollow.
-
Lock
the nut with spring washer
..
N.
lig.
261
178
0 10
OF TAPPET
Fml
NG
CLEARANCE
21 ,996 -:- 21 ,978
0,004 -;- 0,043
22.046 -:- 22,028
0,004
-;-
0,043
22,096 -:- 22,078
0,004 -;- 0,043
securing the gear to
the
oil pump control shaft
(remember to fit the key
..
0.
fig.
261 onto the
shaft) using holdlast tool
14927300
and special
eye wrench.
The
group fitted and
nuts
and
ring
locked. re-
member
to check the proper alignment of the
reference marks on camwheel and engine pinion
..
A
..
fig
.
264 and to fit the tappets
"
Q
..
fig
.
261
into the giudes on
c
rankcase
..
p
.. fig
.
261
.
Checking the valve liming
wIth engIne Installed on vehicle
Proceed as follows:
-
Re
move the spark
plugs.
-
Remove the rocker box
covers.
-
Set a c learance of 1,5
mm
between rocker
and
valve.
-
Undo the screws and remove the alternator
cover.
-
Remove the rubber cover from the inspection
hole
on the
R/
H
side of the gearbox.
-
Using a proper tool, turn the alternator so
as
to bring the
right
piston to
T.D
.C.
(closed valves)
;
observe that the
mark
.. D
..
ap-
pears
in the
middle
of the inspection
hole.
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