CAMSHAFT
AND
ROCKER
ARMS
Rocker
Arm
Check each component part
of
the rocker arm assembly and
carefully inspect the individual rockers where the arrows
indicate.
ROCKER
ARM
INSPECTION
Inspecting
Clearance
Rocker
Arm
And
Shaft
Check the clearance between the rocker arm and shaft and,
if
it exceeds the limit, replace the rocker arm or shaft.
ROCKER
ARM
CLEARANCE
(ROCKER
ARM
TO
SHAFT)
Standard
0.0005
-
o.ooHln
(0.012
-
o.o43mm)
limit
0.0041n
(0.1mm)
Rocker
Shaft
1.
Inspect the rocker shaft where the rocker arms sit for
water and damage. Replace the shaft
if
worn.
2.
Measure the shaft length and the shaft outer diameter
(O.D.).
If
the shaft fails to meet the standards, replace
the shaft.
ROCKER
SHAFT
LENGTH
Standard
9.1341n
(232mm)
ROCKER
SHAFT
0.0.
Standard
16.985
-16.988In
(0.6687
-
0.6693mm)
~
~~II
Or]
I
OIL
HOLES
OIL
HOLES
INSTALLATION
1. Apply a coating
of
engine oil to the camshaft journals
and cams and insert the camshaft through the rear
of
the
cylinder head.
2. Install the camshaft thrust plate as shown in the diagram
tighten the bolts to the specified torque.
THRUST
PLATE
BOLTTORQUE
7 -
9ft-lbs
(10
-12Nm)
TORQUE
BOLT
3. Measure the end play
of
the camshaft by inserting a
feeler gauge in the gap between the rear
of
the thrust
plate and the new front camshaft journal.
VALVE
Standard
0.236
-
0.05511n
(0.06
-
0.14mm)
limit
0.1181n
(o.3mm)
4. Using the oil seal installer tool, install the front oil seal in
the cylinder head.
5. Install the rocker annIrockershaft assembly. Install the
rocker shaft so the portion shown in the diagram
is
located on the front.
BOLT
HOLE
FRONT
BOTTOM
VIEW
OIL
HOLE
6. Tighten the rocker arm shaft bolts (4 bolts) uniformly and
then to the specified torque.
ROCKER
ARM
SHAFT
BOLT
TORQUE
21
-
25ft-lbs
(29
-
35
Nm)
Engines & Generators
20
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