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N
37
41
40
OM
3
15
16
N
OM
9
22 Nm
(2.2Kgm)
N
11
21
1A
4
10 Nm (1 kgm)
10
CHECKING WEAR LIMITS
Chart references
Component
34
Cylinder
39
Piston
40
Upper segment
41
Lower segment
11
Head
39
42
37
N
38
23 25 26
22
OBM
19
N
OM
N
17
18
14
24
N
20
G
22
26
25
23
7
33
8 Nm (0,8 Kgm)
6
2
OM
1
60 Nm (6 kgm)
N
Wear limit
Bore : 69,1 mm (originario : 69,000 - 69005 mm)
Piston/cylinder play : 0,02 - 0,04 mm
Distance from edge : 0,45 mm (original : 0,15 - 0,30 mm)
Distance from edge : 0,70 mm (original : 0,30 - 0,45 mm)
Deformation: < 0,03 mm
5
N
OM
N
27
28
29
32
31
13
30
12
OBM
28
27
: New item
N
OM
: Engine oil
: Change oiol
O.C.
OBM
: Molibdenum Bisulphate Oil
: Grease
G
8 Nm (0,8 Kgm)
DISASSEMBLY SEQUENCE
8 Nm (0,8 Kgm)
CYLINDER HEAD
Remove the oil discharge cap (1A)
Remove the distributor cap (1) and O-ring (2)
36
Remove the valve cap on the aspiration side (3) and discharge
side (4)
Remove the chain stretching unit (5)
Remove the breather plate (6)
Remove the distribution gear (7)
35
Remove the nuts (9) and bolts (10)
Remove the head (11), cylinder head gasket (12) and centering
pins (13)
CAMSHAFT AND ROCKER ARMS
34
Remove the 2 screws (14), and the block washer (15) and
plate (16)
Remove the rocker arm pins from the aspiration valves (17)
and exhaust (18)
Remove the aspiration rocker arms (19) and exhaust rocker
arms (20)
Slide off the camshaft (21)
Remove the lock nuts (22) and adusters(23)
Remove the seal ring (24)
VALVES AND VALVE SPRINGS
Remove the valve half-cones (25), and upper plates (26)
Remove the inner springs (27) and outer springs (28)
Remove the aspiration valve (29) and exhaust valve (30)
Remove the valve guides (31) and lower plates (32)
CYLINDER AND PISTON
Remove the distribution chain guide on the discharge side
(33)
Slide off the cylinder (34), the centering pins (35) and the
cylinder base gasket (36)
Remove the piston rings (37),the piston pin (38)
Remove the piston (39)
Remove first the upper segment (40), then the lower segment
(41) and the scraper ring (42)
REASSEMBLY
Reverse the order of disassembly instructions, making sure
tightening torques are correct, and all components requiring
grease are greased or, if necessary, replaced with
components specified in the table.
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