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8-30
cylinder head for further inspection.
6. Remove the valve stem seal
(Fig. 20). If
air pressure has forced
the piston to the bottom of the cyl·
inder, any removal of air pressure
will allow the valve(s) to faD into the
cylinder. A rubber band, tape or
string wrapped around the end of the
valve stem will prevent
this
condition
and will still allow enough travel to
check the valve for binds.
FIG. 19- Compressing Valve
Spring -
In Chassis
7. Install a new valve stem seal.
Position the spring over the valve.
Install the spring retainer and sleeve.
Compress the valve spring and install
the valve spring retainer locks.
8. Apply Lubriplate to both ends
of the push rod, the valve and push
rod ends of the rocker arm, and the
valve stem tip. Remove the rocker
arm shaft and install the push rod(s),
making sure the lower end of the
rod is positioned in the valve lifter
push rod cup.
9. Remove the wire securing the
valve rocker arm and slide the rock-
er arm into position. If an end valve
rocker arm was removed, slide it
into position on the shaft and install
the spring washer and retaining pin.
FIG. 20- Valve Stem Seal
Removal
GROUP 8-
ENGINE
Tum off the air and remove the air
line and adapter. Install the spark
plug and spark plug wire.
10. Jnstall the rocker arm shaft
by following the instructions under
Rocker Arm Shaft Assembly Instal-
lation.
11. Replace the emission control
system vent hose and valve assembly.
12. Repjace the fuel pipe and
vacuum lines.
13.
In.
s tall the valve rocker arm
cover.
14. Install the air cleaner.
CYLINDER FRONT COVER
AND TIMING CHAIN
REMOVAL
1. Drain the cooling system and
the crankcase. Disconnect the radia-
tor upper hose at the coolant outlet
housing and the radiator lower hose
at the water pump. On a car with
automatic transmission. disconnect
the transmission oil cooler lines from
the radiator.
2. Remove the radiator. Remove
the drive belt, fan and pulley. Using
tool6306 AG. Remove the crankshaft
damper.
3. Remove the cylinder front cov-
er and gasket.
4. Rotate the crankshaft in a
clockwise direction (as viewed from
the front) to take up the slack on
the left side of the
chain.
5. Establish a reference point on
the block and measure from this
point to the chain. Rotate the crank-
shaft in the opposite direction to
take up the slack on the right side
of the
chain.
Force the left side of
the chain out with the fingers and
measure the distance hetween the
reference point and the
chain.
The
deflection is the difference between
the two measurements. If the deflec-
tion exceeds
t
inch, replace the
timing chain and sprockets.
6. Crank the engine until the tim-
in~
marks are aligned as shown in
(Fig. 21). Remove the camshaft
sprocket retaining bolt and washer.
Slide both sprockets and timing
chain forward and remove them as
an assembly (Fig. 22).
7. Remove the oil pan and related
parts.
FRONT OIL SEAL
REP'LACEMENT
It
is good practice to replace the
oil seal each time the cylinder front
cover is removed.
1. Drive out the oil seal with a
pin punch. Clean the recess in the
cover
2. Coat a new seal with grease
and install the seal. Drive the seal in
until it is fully seated in the recess.
TIMING MARKS
A 1370-B
FIG. 21 -Aligning Timing
Marks
(Fig. 23). Check the seal after instal-
lation to be sure the spring is
properly positioned in the seal.
FIG. 22 - Timing Chain and
Sprockets Removal
CLEANING AND INSPECTION
Refer to page 8-17 for the cleaning
and inspection
procedures.
Clean the
crankshaft damper following the ref-
erenced
procedures.
INSTALLATION
1. Oil the timing
chain.
Position
the sprockets and timing chain on
the camshaft and crankshaft. Be sure
the timing marks on the sprockets
and chain are positioned as shown in
FIG. 23 - Crankshaft Front Oil
Seal Replacement
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