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MAINTENANCE AND ADJUSTMENT
i
hi
...
po"tUln is 5ubjll!lC1 to
WU/.
Rocker arm
(
3)
Cheek to be su
re that
the
oil
hole
dlUled
ou
t
in
the
rocker
ann shaft
is
clear.
When
in~lallin
g
re-
placement
bushing;,
be sUle to
aligll
.he
oil
ho
les.
Valve-clearance 3djusting
.screW
inspection
Examine each adjusting screw to
see
if
its end
(ace
for
tontacling
with
the push
rod
is
wo
rn
down
~xcessively
or
if its
threads
are showing signs
of
failu
re
;
if
5-0
found,
replace
it
by
a
new
One
.
Push
rod
inspection
Check
push
rods
for
deOeetlon, an
d
inspect them for
wear at lhe
end
faces
for conta.cting
with
the tappet and
adjusting
screW
.
"Deflect,
i
on'>
referS to the runout
exhibited
by the push
rod
being
rotated
wi th
its enda
su
ppor
ted
by
such as
"V"
blocks.
Uni
(:
mm (in.
)
hem
Standard
Push
rod
dl"ortlon
0.4 (0.016),
max.
Exbau&t manlfold inspection
Inspect
the manifold
flange
for cracks and
distortion
.
If
the
Oango facos
ar.
warped by
mar.
th'n
0.2
mm
(0.0079 in.) when
checke
d
as shown, grind them smooth
and flat. If
any
flange
is found crar.ked. replace the
manifold.
Checking
exhaust
man
ifold
flange
faces for f
J atnass
54
CrlIDkshaft inspection
(I) Crankshaft distortion
Support
the
c
rankshaft
as
shown
an
d roll i'
'0
measufl : :
its
deflection
wi
th
a dial gauge
.
"Djstof-
li
on"
is
one
-hal
f
of
the
denection (dial gauge
reading)
;
If
i
t e"ceods the
repair
limit,
reduce
it
by
bending
the
crankshaft in a
p<es,s
.
Unit:
mm l in.)
Item
Standard
Repair
lim
it
Crankshaft
distortion
0.Q2
(0.0008),
0.05
max
(0.O()20)
a'k
. .
lH..:'
..
,,'-'_
..
P,
... .
c
...
.
Ii(."i""='T"~i'
--:--~ ~
t'
..,
\0>
.
'/'t""r.
1
';
Checking
crankshaft
for distortion
(2)
JOl1JYlal inspection
(a)
Inspect
each jou rnal
for
surface
naws
such
15
roughing,
scratches, pitting and burns, and, a
necessary, repair the journals
by grin ding to the
next
undersize or
replace
the
crankshaft.
(b)
Mike
each
journal
to
take
a total
of four
read-
ings
to
determine the wear
.
out-or·round and
tapor
(cyL
indricity).
If any of .he
limits is
exceeded,
repair
by
grinding
lO
the
next unde
r-
size O
r
replace (he
crankshaft.
I'IF"-'
()
"
..
Mikin
g cran
kshaft journal:.
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