ENGINE
®
@
89
warpage. Replace the cylinder head cove r if the
gasket
su
rf
ace is warped
to
or
beyond the service
limit listed
in
Table I.
4. Disassemb
le
and inspcctthe rocker arms
as
de·
scribed
in
this chapter.
Camshaft Inspection
1.
Measure the right. center and left·hand
camshaft bearing journals (Figure
81
) with a
mi
crometer. Compare
to
the dimensions given
in
Table
l.
If worn
to
the service limit or
le
ss. the
camshaft
mu
st be replaced.
2.
Check the camshaft lobes (I"igure 82)
for
wear.
Th
e lobes should show
no
signs
of
scoring and the
edges should be square.
Sl
ight damage
may
be
removed with a
si
li
cone carbide oilstone. Use No.
100·120
grit stone initiall
y.
then polish with a No.
280-320 grit stone.
3.
Even though the camshaft lobe
su
rfa
ce
appears
to
be
satisfactory, with
no
visible signs
of
wear,
the cams
ha
ft
lobes must
be
measured with a
micrometer (
Figure
83). Compare to the
dimensions given
in
Table I. If worn
to
the service
limit
or
less, the camshaft must be replaced.
4. Place the camshaft on a set
of
V-blocks and
check its runout with a dia l indi
ca
tor.
Compare
to
the dimension given
in
Table
l.
If the runout is
to
the
se
rvice lim
it
or more. the camshaft must
be
replaced.
5. Make sure the locating pin
in
the end
of
the
camshaft is a tight fit. If not. replace the pin.
6.
In
spect the cams
haft
bearing surfaces
in
the cyl·
inder head (Figure 84) and
cy
linder head cover
®
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