ROCKER
ARMS
AND
CAMSHAFT
ENG
~
~.
4.1nspect:
• Rocker arms
• Rocker
arm
shafts
Damage/wear
-7
Replace.
**********************************
Inspection steps:
.Inspect
the
two
contact areas on
the
rocker arms
for
signs
of
abnormal wear.
1)
Rocker
arm
shaft hole.
2)
Camshaft lobe contact surface.
Excessive
wear
-7
Replace.
• Inspect the surface
of
the rocker arm shafts.
Blue discoloration/pitting/scratches
-?
Replace/check lubrication.
• Measure the inside diameter
®
of
the
rocker arm holes.
Out
of
specification
-?
Replace.
Rocker arm inside diameter:
14.000
N 14.018
mm
(0.5512
IY
0.5519 in)
• Measure the outside diameter
(fi)
of
the
rocker
arm
shafts.
Out
of
specification
-7
Replace.
Rocker arm outside diameter:
13.980
N 13.991
mm
(0.5504 - 0.5508 in)
• Calculate the clearance
by
subtracting the
rocker
arm
shaft outside diameter
from
the rocker
arm
inside diameter.
Clearance greater than 0.08
mm
-7
Replace
the
defective part(s}.
Rocker arm
to
shaft standard
clearance:
0.009
IY
0.038
mm
(0.0035 - 0.0015 in)
**********************************
ROCKER ARM AND CAMSHAFT
INSTALLATION
1.Apply:
•
Molybdenum
disulfide oil
(onto the camshaft journals)
2.1nstall:
• Camshaft
CD
•
Camshaft
bushing ®
• Stopper plate ®
• Lock washer ® _
• Bolts (stopper plate) ®
4 -
19
~~20~N:"':"m~(2~.O~m---=.
k-g~,
'~4~.4"":"ft-.~lb~)
I
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