CAMSHAFT
AND
ROCKER
ARMS
TORQUE
21
-25
FT-LBS
TORQUE
21
-
25
Ft-Lbs
2!
-35
Nm
~
21-35Nm
---,
iii
NUMBERS
INDICATE
THE
SUGGESTED
ORDER
OF
DISASSEMBLY
10
ROCKER
ARM
®
EXHAUST
1
:~~~~:::;B~~CKER
TORQUE
6 _ 7
FT_LBs~9WAVE
;AS~HER
8-10Nm
.~
8ROCKERAR
INTAKE
5
ROCKER
ARM·
•
'"'
INTAKE
~
\6
WAVE
WASHER
)
3
W
'''WASHE.
~
,
1V~
<-
')
\1
=;;::Ii
2
~~R
ARM
4~~:8~TARM
12
CAMSHAFT
.
~
OILSEAL
~
INSPECTING
THE
CAMSHAFT
1.
Visually inspection the camshaft for cracks and damage.
If
necessary, replace the camshaft.
NOTE:
If
the
dmnage is
slight,
you
may
be
able
to
correct
the
camshaft
with an oil soaked fine
emery
grindstone.
Take
special
care
to
not damage
the
original
cam
form.
2.
Inspect the camshaft journal and,
if
wearing exceeds the
limit, replace the camshaft.
CAMSHAFT
JOURNAL
DIAMETER
STANDARD
1.6118
-1.6124in
(40.940·
40.955mm)
CHECK
JOURNAL
BEARINGS
FOR
WEAR
DAMAGE
Camshaft
NOTE:
If
the
Journal
is
seized.
also check
the
cylinder head!
3. Measure the
cam
height and,
if
it is less than the limit,
replace the camshaft.
CAMSHAFT
HEIGHT
Intake
#1
#2
#3
Exhaust
#1
#2
#3
C:C-~O·
HEIGHT
~-
STANDARD
1.3815in
(35.09mm)
1.3807in
(35.01mm)
1.3803in
(35.06mm)
1.3839in
(35.15mm)
1.3831in
(35.13mm)
1.3854in
(35.19mm)
UMIT
1.3618in
(34.59mm)
1.3610in
(34.57mm)
1.3606in
(34.56mm)
1.3642in
(34.65mm)
1.3634in
(34.63mm)
1.3657in
(34.69mm)
MEASURING
CAMSHAFT
HEIGHT
4. Inspect the clearance between the camshaft journal and
the camshaft support bore as follows:
a. Measure the camshaft journal diameter and the
camshaft support bore.
b. Calculate the clearance and replace the camshaft
or
cylinder head
if
the clearance exceeds the limit.
BEARING
OIL
CLEARANCE
STANDARD
0.0018·
0.0033in
(.045
.
0.085mm)
Engines & Generators
19
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