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PART 8-2- 200, 250 C.I.D. SIX CYLINDER ENGINES
8-27
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FIG. 1 0 -
Engine
Rear Support
sary, contmue tightening
the two
outer nuts as required
to align the
castellations.
INTAKE
MANIFOLD
REPLACE·
MENT. 250-2V ENGINE ONLY.
REMOVAL
1. Remove the aircleaner.
2. Remove the manifold hot
water
hoses.
3. Remove the fuel line fuel fil.
ter to carburettor.
4. Remove choke tubes,
throttle
linkage, distributor vacuum
and
crank·
case emission tubes.
5. Remove the
bolts
manifold to
cylinder head and remove the mani-
fold.
6.
Remove
the
carburettor from
the manifold.
INSTALLATION
1. Clean all old gasket material
from the cylinder head and manifold.
2. Apply sufficient grease to the
manifold gaskets to hold them in
position
whilst the manifold is
being
fitted.
3. Position the
gaskets on
the
cylinder head or manifold
and
assem·
ble the manifold to the cylinder
head.
4. If previously removed install the
carburettor on the manifold
using
a
new flange gasket.
5.
Install choke
tubes, throttle
linkage,
distributor vacuum and
crank·
case emission tubes.
6.
Install the fuel
line filter to
carburettor.
7.
Install the aircleaner.
8.
Start
engine
and
check carbur-
ettor adjustment.
EXHAUST MANIFOLD REPLACE-
MENT. 250 2V ENGINE ONLY.
REMOVAL
1.
Remove the intake
manifold as
previously outlined.
2. Loosen the alternator belt ad-
justing arm and remove the drive belt,
and swing the alternator outboard as
far as the mounting brackets will
allow.
3. Loosen the muffler inlet pipe
to manifold
extension pipe
clamp and
free the pipe at the join.
4. Remove the bolts manifold to
cylinder
head and remove the mani-
fold from the vehicle.
INSTALLATION
1. Remove all the
old
gasket mat-
erial
from
the cylinder head
and
mani-
fold.
2. Using new gaskets assemble
the
manifold to the cylinder head and
torque the bolts to specification.
3. Connect the muffler inlet pipe
to the manifold extension and torque
the clamp to specification.
4.
Install
the
alternator
drive belt
and adjust
to
specification.
5. Install the intake manifold
as
described in previous operation.
EXHAUST MANIFOLD
REMOVAL
1. Remove the air cleaner. Dis-
connect the muffler inlet pipe from
the exhaust manifold.
l. Bend the exhaust manifold re-
taining bolt lock tabs back and re-
move the retaining bolts. Remove
the exhaust
manifold.
CLEANING AND INSPECfiON
Refer to page 8-15
for
the cleaning
and
inspection
procedures.
INSTALLATION
1. Clean the mating surfaces of
the exhaust manifold and cylinder
head. Inspect manifold to muffler
inlet
pipe sealing ring.
l. Apply graphite
..
grease to the
mating surface of the exhaust mani-
fold.
3. Position the exhaust manifold
on the cylinder head and install
the retaining bolts and tab
washers.
Working from the center to the ends,
torque the bolts to
specifications.
Lock the bolts by bending one tab of
the washer over a flat on the bolt.
4. Place sealing ring on the mut-
fter inlet pipe. Position the muffler
inlet pipe to the manifold. Install
and torque the retaining nuts to
specifications.
5. Install the air cleaner. Start the
engine and check for exhaust leaks.
VALVE ROCKER ARM
SHAn ASSEMIL Y
REMOVAL
1. Remove the air cleaner
2. Remove the effilSSion control
system vent hose and valve
assembly.
3. Remove the carburettor to
fuel
pump pipe and the carburettor
to
distributor vacuum line.
4. Remove the valve rocker
arm
cover and discard the gasket.
5. Remove the rocker arm
shaft
support bolts by loosening the
bolts
two turns at a time in
sequence. Re-
move the rocker arm shaft
assembly
(Fig. 11). Remove the valve push
rods.
FIG. 11- Valve Rocker Arm
Shaft Removal
INSTALLATION
1. Apply Lubriplate to both ends
of the push rods and to the valve
stem tip.
2. Install the valve push
rods. Po-
sition the valve
rocker
arm shaft
assembly on the cylinder head.
3. Install and tighten all valve
rocker arm support bolts, two turns
at a time in sequence, until the
sup-
ports fully contact the
cylinder
head.
Torque the bolts to specifications.
4. If any part which could affect
the valve clearance has been
changed, check the valve clearance
following the procedure outlined
un-
der Valve Clearance-Six
cylinder
engines (page
8-11 ).
S. Clean the valve rocker
arm
cover and cylinder head gasket
sur-
faces. Coat one side of a new gasket
with an oil resistant sealer and
lay
the cemented side of the gasket
in
place on the
cover.
Install the
cover,
making sure the gasket seats evenly
around the
head.
Tighten the cover
retaining bolts in two steps. First,
torque the bolts to
specifications;
then, retorque to the same specifi-
cations two minutes after initial
tightening.
6. Install the emission control
system hose and valve assembly.
7. Install the air cleaner.
DISASSEMBLY
1. Remove the pin and spring
washer from each end of the valve
rocker arm shaft.
1. Slide the valve rocker arms,
springs, and supports off the shaft.
Be sure to identify the parts.
3.
If
it is necessary to remove
the
plugs from each end of the
shaft,
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