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PART 8-2-. 200, 250
C.I.D.
SIX CYLINDER
ENGINES
8-29
1
14 •• Connect the accelerator rod
retracting spring. Connect the ac-
celerator
rod
at the carburettor.
15. Connect the distributor
vac-
uum line at the distributor. Connect
the
carburettor
fuel
inlet
line at the
fuel pump.
16. Connect the temperature
send-
ing unit wire at
the
sending unit.
Conrtect the spark plug wires. Be
sure the wires are forced aU the way
down into their sockets.
17. Fill and bleed
the
cooling
system.
18. Start the engine and check for
coolant and oil leaks.
DISASSEMBLY
1.
Remove deposits from
the
combustion
chambers
and
valve
heads with a
scraper
and a wire
brush before
removing
the valves.
Be
careful not to scratch the cylinder
head gasket surfaces.
FIG. 15 -Cylinder Head Bolt
Torque Sequence
2. Compress
the valve springs
(Fig.
16). Remove
the valve retainer
locks and
release the spring.
3. Remove the
spring retainer,
stem
seal,
and
valve.
Discard the
valve stem seals.
Identify all valve
parts. If
the
cylinder head
is
to be
re-
placed, remove the manifold assem-
bly.
FIG. 16- Compressing Valve
Spring - On Bench -Typical
CLEANING AND INSPECTION
Refer
to page 8-15 for the cleaning
and inspection procedures.
ASSEMBLY
1.
If
the cylinder head
is being
replaced,
install
the manifold
assem-
bly
except on 2V installations. Lub-
ricate the valve guides and valve stems
with engine oil. Apply Lubriplate to
the tip of the valve stems.
2." Install
each valve (Fig. 17) in
the valve guide from which
it
was
removed or to which it was fitted.
Install a new stem seal on the valve.
3. Install the valve spring assem-
bly over the valve. Install the spring
retainer.
4. Compress the spring
and install
the retainer locks
(Fig.
16).
5. Measure the assembled height
LOCKS\
6518
RETAINER~~~
6514
13'
6513
OIL SEAL
~)
;p~~~~-..
~~·~·
#M~'
65~
INTAKE
VALVE
6~07
FIG. 17- Typical Valve
Assembly
of the
valve spring
from
the
surface
of the cylinder head spring pad to
the underside of the spring
retainer
with dividers
(Fig. 18).
6. Check the dividers against a
scale. If the assembled height is
greater than
specifications, install
the
necessary 0.030-inch thick spacer(s)
between the cylinder head spring pad
and the valve
spring to
bring the as-
sembled height to the
recommended
dimension. Do not install spacers un-
less necessary. Use of spacers in ex-
cess of recommendations will result
in overstressing the valve springs
and overloading
the camshaft lobes
which
would lead to spring breakage
and wom camshaft
lobes.
UNDERSIDE OF
SURFACE OF
SPRING RETAINER
SPRING PAD
FIG. 18-
Valve Spring
Assembled
Height
VALVE SPRING,
RETAINER
AND STEM SEAL
REPLACEMENT
Broken
valve springs or defective
valve
stem
seals and retainer may be
replaced without removing the cyl-
inder head, provided damage to the
valve or valve seat has not occurred.
1. Remove the air cleaner. Re-
move the crankcase ventilation regu-
lator valve from the valve rocker arm
cover. Remove the fuel and vacuum
pipes then remove the valve rocker
arm cover. Remove the applicable
spark plug.
2. Loosen the valve rocker arm
shaft support bolts 2 turns at a time,
in sequence, until the valve spring
pressure is relieved. Remove both
valve push rods of the cylinder to
be
serviced.
3. Install an air line with an
adapter in the spark plug hole.
4. Tighten the retaining bolts just
enough to seat the rocker arm shaft
supports on the cylinder head. Push
the rocker arm to one side and secure
it in this position (Fig.
19).
To move
the rocker arm on either end of the
shaft, it will be necessary to remove
the retaining pin and spring washer
and slide the rocker arm off the shaft.
5. Turn on the air supply. Air
pressure
may turn the crankshaft un-
til
the piston reaches the bottom of
its stroke. Using the valve spring
compression tool shown in (Fig. 19)
compress the valve and remove the
valve spring retainer locks, the spring
retainer
and the valve spring.
If
air pressure fails to bold the valve
in the
closed position during this op-
eration,
it
can be presumed that the
valve is not seating or is damaged.
H
this
condition occurs, remove the
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