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106
3
.
Subtract
the
camshaft bearing
journal
outer
diam
eter (Step
5)
from the
cylinder head
bearin g
bore
diameter (Step 8).
b. Rep lace
the camshaft and/or
cylind er head
if
the
clearance
exceeds
the service
limit
in Ta-
ble4.
10.
Inspect the
thrust face of the
end cap
(A
, Figure
49)
for
wear. If
the
end cap
is
dam
aged,
insta ll
a new
ca
p and
carefu
lly
inspect
the end of the
ca
mshaft
.
II.
Inspect
the
camshaft
sprocke t (F
igure
SO)
for
damaged teeth . Ifthe
camshaft sprocket
is
dam
aged
orseverely
worn.
replace
it.
Also, inspect the
crank-
shaft driv
e
sprocket
as described
in Chapter Five.
NO TE
lf
the
camshaft sprockets are
worn,
check
the
camsha ft
drive
chain. chain
g
uides and chain
tensioner
for
exces-
sive
wear or
damag
e.
Automatic Compression
Re
lea
se
Mec ha nism
Tes
ti ng
The
automaticcompression
release
rnechanism lo-
cated within
the
center
of
the
camshaft
can
be
in-
spected without
removing the
camshaft
fro
m
the
eng
ine.
®
1.
Twist therelease mechanism
inside
the camshaft
and
observe the
smoothness o
f
operation. There
should be no
roughn ess
and
the
spring should
return
the
weight
again st
the stop
pin.
2.
The actu
ator
ball
(F
igure
51) mu
st be
held
out-
ward when
the release mechanism is
in
the
com-
pression release position.
3. Withdraw
the release mechanism
(Figu re
52)
from Ihe
ca
msha ft.
Inspect
the shaft and spring
lo r
wear
or
damage.
4. Inspect
the
lobe
at
the
end of the
release lever
shaft and the actuator ball for wear
or
damage.
Th
e
actuator
ball
is
not available separate ly from
the
camshaft.
NO TE
To
install/he
aut
omatic
compress ion
release mechanism
(Figure
53), the
actuator ball (Figure
51)
II/US/
be
held
out.
If
necessary. lise
a small
magnet
10
hold the
actuator
ball out
while
installing
the
comp ress ion
re-
lease
into the camstiaft.
CHAPTER FOUR
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Table of Contents
Troubleshooting
