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PART 8-4- 302-351 C.I.D. V8 ENGINES
8-49
INSTALLATION
1. Install the
crankcase
ventilation
filter in the air cleaner body.
2. insert the regulator valve into the
valve
rocker
arm
cover
mounting
grommet.
3. Connect the vent hose to the
carburetor, regulator valve and hot idle
compensator (if so equipped).
4. Install the air cleaner and intake
duct assembly.
5. Install the ventilation system air
intake hose to the air cleaner and the oil
filler cap.
6. Start the engine and check for
·
leaks.
CYLINDER HEADS
If a cylinder head is to be replaced,
follow the procedures under Cylinder
Head Disassembly and Assembly, and
transfer all valves, springs, spark plugs,
etc., to the new cylinder head. Clean and
inspect all parts, reface the valves (refer to
8-,16 Section 3) and check all assembly
clearances before assembling the new or
used parts to the new cylinder head.
REMOVAL
1.
Remove the intake manifold and
carburetor as an assembly following the
procedure
under
Intake
Manifold
Removal.
2. Remove the rocker arm cover(s).
If the left cy Iinder head is to be
removed
on a vehicle with an air
conditioner,
isolate
and
remove the
compressor.
If the left cylinder head is to be
removed on a vehicle with power steering,
disconnect the ·power steering pump
bracket from the left cylinder head and
remove the drive belt from the pump
pulley. Position the power steering pump
out of the way and in a position that will
prevent the oil from draining out.
3. If the right cylinder head is to be
removed, remove the alternator mounting
bracket through bolt and air cleaner inlet
duct
from
the
right
cylinder head
assembly. Remove the ground wire at the
rear of the cylinder head.
4. Disconnect
the
exhaust
manifold(s) from the muffler inlet pipe(s).
5.
Loosen the rocker arm fulcrum
bolts so that the rocker arms can be
rotated to the side. Remove the push rods
in sequence (Fig. 10) so that they may be
installed in their original positions.
6. Remove
the
cylinder
head
attaching bolts and lift the cylinder head
off the block. Remove and discard the
cylinder head gasket.
IJ
FIG. 10- Removing Valve Push Rod
INSTALLATION
1. Clean the cylinder head, intake
manifold, valve rocker arm cover and
cylinder head gasket surfaces. If the
cylinder head was removed for a cylinder
head
gasket
replacement,
check the
flatness of the cylinder head and block
gasket surfaces.
2. Position the new cylinder head
gasket over the cylinder dowels on the
block. Position the cylinder head on the
block and install the attaching bolts.
3. The
cylinder head bolts are
tightened
in
three progressive steps.
Tighten all the bolts in sequence (Fig. 11)
to 50 ft-lbs., then to 60 ft-lbs. and finally
to specifications. When cylinder head bolts
have
been
tightened
following
this
procedure, it is not necessary to retorque
the
bolts
after
extended
operation.
However, the bolts may be checked and
retorqued if desired.
4. Clean the push rod in a suitable
solvent. Blow out the oil passage
in
the
push rod with compressed air. Check the
ends of the push rods for nicks, grooves,
roughness or excessive wear. Visually
check the push rods for straightness o.r
check push rod runout with a dial
indicator. If runout exceeds the maximum
limit at any point, discard the rod. Do not
attempt to straighten push rods.
5.
Lubricate and install the push
rods in their original positions. Apply
Lubriplate or equivalent to the valve stem
tips.
6.
Lubricate and install the rocker
arms following procedures under Valve
Rocker Arm Installation.
7. Connect the exhaust manifold(s)
at the muffler inlet pipe(s). Tighten the
nuts to specifications.
8. If the right cylinder head was
removed, install the alternator mounting
bracket through bolt and air cleaner inlet
duct on the right cylinder head assembly.
Connect the ground wire at the rear of the
cylinder head. Adjust the drive belt
tension to specifications.
9.
Apply oil-resistant sealer to one
side of new cover gasket(s). Lay the
cemented side of the gasket(s) in place in
the cover(s). Install the valve rocker arm
cover(s).
FIG. 11 -Cylinder Head Bolt Torque
Sequence
FIG. 12- Compressing Valve Spring on
Bench
If the left cylinder head was removed
on a vehicle with an air conditioner, install
the compressor.
If the left cylinder head was removed
on a vehicle with power steering,
install
the drive belt
and
power steering pump
bracket. Install the bracket attaching
bolts.
Adjust
the
drive
belt
to
specifications.
10. Install the intake manifold and
related parts following the procedure
under Intake Manifold Installation.
DISASSEMBLY
1. Remove the exhaust manifolds
and the spark plugs.
2. Clean the carbon out of the
cylinder
head
combustion
chambers
before removing the valves.
3. Compress the valve springs (Fig.
12). Remove the spring retainer locks and
release the spring.
4.
Remove the spring retainer, spring
and stem seal. Discard the valve stem seals.
Remove any burrs from the valve stem
with Tool TIOP-6506-A as shown in Fig.
13 to prevent damage to the valve guide
bore. Remove the valve. Identify all valve
parts.
5. Clean, inspect
and
repair the
cy Iinder head as required, or transfer all
usable parts to a new cylinder head.
Note The damper
spring is
an
interference
fit in the valve spring. The spring and
damper is removed as an assembly.
ASSEMBLY
All valves, valve stems and valve guides
are to be lubricated with heavy engine oil
MS. The valve tips are to have Lubriplate
or equivalent applied. The lubricant is to
be applied before installation.
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