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(4)
Valve guides should be replaced when valve stem clearance exceeds specifications (See “SERVICE
DATA).
Draw valve guides out and press new guides in.
Refer to
“SERVICE
DATA for clearance specifications.
After replacing valves and guides,
lap
valves in place until a uniform ring shows around the face of
the valve. Clean valves and wash cylinder head thoroughly.
(5)
Install cylinder head to cylinder with new head gasket.
Tighten four flange bolts evenly
in
three steps by the following tightening torque:
Cylinder head
MI0
x
65
mm bolt
:
4
pcs.
I~
Tightening
torque
I
1
st
step
I
2
nd step
I
Final Step
I
r
~~
9.8
N
-m
(24.6-30.4
ft
.
Ib.)
(1
4.5
f?
-
Ib.)
(7.2
ft
-Ib.)
(340-420
kg
-
cm)
(200
kg
scrn)
(100
kg
mcm)
33.3-41.2
N
-
m
19.6
N
-m
I
I
I
I
5-4-9
ROCKER
ARMS
AND
PUSH
RODS
(1)
Insert push rods into crankcase. Put
push
rod tip in the hollow of tappet top.
(2)
Apply oil
to
rocker
arms
and assemble them to cylinder head using pivot
and
nut.
pcs.
Fig.
5-36
-
37-