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PART 1-2 - 223 SIX ENGINE
1-29
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SUP
1
-
SIT
NO.1 PISTON
ON T.O.C
.
AT
END
OF COMPRHSION
STROKE. ADJUST NO.1 INTAKE
AND
EXHAUST.
SUP
4
-
AOJUST
FIG.
20-Cylinder
He
ad Bolt Tightening
Sequence
locating
hole.
Install
a
new
"0"
ring
seal on
the
lower
end
of
the
oil
inlet
line, then position the line in
the
No.
6 support.
Make sure
the lower
end
of
the
oil line
"0"
ring
seal
is in the
oil
supply
counterbore, then install
the
bracket and support bolt.
Tighten
all
the retaining
bolts
to 45-55
foot-
pounds torque.
Perform a
preliminary
(cold) valve
lash adjustment.
9-A
INTAK
E
&
EXHAUST
STEP
.$
-
AOJUST
NO.
2
INTAKE
&
EXHAUST
3
_
.0.' " "
NO.
3
INTAKE
&
EXHAUST
STEP
6
_
AOJUST
NO.
4
INTAKE
&
EXHAUST
1411-A
5.
Install
the
manifold
to cylinder
head bolts
and tighte
n
them to
23-28
foot-pounds
torque.
Position
the
two
vacuum
lines
and
the carburetor
fuel
inlet
line
on
the
engine. Connect
the
distributor vacuum line
and
the
car-
buretor fuel
inlet line
at
the
carburet·
or,
and
the manifold vacuum line at
the manifold.
Connect
the
choke con-
trol
cable. Remove
the
tape
from the
carburetor air horn.
FIG.
21-Preliminary Val
ve
LQ!h Adjustment
On
a
truck
with
an
automatic
trans-
mission,
install
the accelerator re-
tracting spring bracket
on
the
block,
then connect the spring. Connect the
throttle
control
rod
and
the
acceler-
ator
assembly
connecting link.
On
a
truck with
a
conventional
drive
or
overdrive tra
nsmission,
con-
nect
the
accelerator
rod
assembly and
the
accelerator retracting
spring.
6. Install the ignition
coil,
spark
plugs,
and
the distributor
cap. Con-
nect the
spark
plug wires
and the coi
l
high
tension
lead. Connect the carbu-
retor
fuel
inlet line and the vacuum
line
at
the
fue
l
pump.
and
the dis-
tributor
vacuum
line
at the
distribu-
tor.
Connect the
battery
ground
cable,
the oil pressure
and
water tempera-
ture
sending
unit
wires,
the
heater
hose,
and
the radiator upper hose. Fill
and bleed the cooling
system.
7.
Start
the
engine and operate
it
for a
minimum
of
30
minutes at
ap-
proximately
1200 rpm to stabilize
engine temperature!.
Check
the
valve
lash
with the
engine
id ling
and
adjust
the
lash
if
necessary.
8. Coat
one side of
the
valve
:ocker
arm
cover
gasket
with
oil
re-
sistant
scaler,
and
lay the
cemented
side of
the
gasket
in place in the
cover. Install the
cover,
making
sure
Ihat
the
gasket seats evenly
all around
the
head.
Inslall
the rubber seals
on
the
studs
making
sure they are cen-
tered
in the
cover
openings.
Tighten
the nuts
to 2.0-2.5 foot
-pounds
torque.
Inslall
the
air
cleaner.
VALVE
LASH
ADJUSTMENT
It
is very
important
that the
valve
lash
be held
as close as
possible
to the
correct specifications.
If
the lash is
set
too
close,
the valve will open
100
early
and close too late, resulting in
rough engine
idle.
Burning
and warp-
ing of
the
valves
will occur also
be·
cause
the
valves
cannot
make
firm
contact
with the
seats
long
enough
to
cool
properly. If the lash
is excessive,
it
wi
ll
cause
the
valves
to
open too
late
and
close
too early causing valve
bounce.
In
addition,
damage
to
the
camshaft
lobe is likely
because
the
tappet
foot
will
not follow
the pattern
of
the
camshaft
lobe, causing
a
shock
contact between
these two paris.
If
the
cylinder
head
or
the valve
rocker arm
shaft assembly has
been
removed and
installed, it will
be
necessary to
make a preliminary
(cold) valve lash adjustment before
starting
the
engine.
If
the
adjustment
is made
for an
engine
tune-up,
follow
the
final
adjustment
procedure.
The cylinders are
numbered
from
fronl to
rear,
1-2-3-4-5-6.
The
valves
are arranged from front
to
rear, B-I-
1-B-I-E· B-1
·E·
I·
I·E.
ItRlUMINARY
ADJU.sTMENT
1.
Turn
all
the
valve
adjusting
screws
until
interference is
noted be-
tween the
screw
and the rocker
arm,
then
check
the torque required to tum
the
screw further.
If
the
torque re.-
quired
to
turn a
screw
is less than 3
fool.pounds
(36
inch pounds), try a
new self locking
adjusting
screw.
If
this is
still
unsatisfactory,
replace the
rocker
arm and
adjusting
screw.
2_
Make two chalk
marks on the
cranksha ft
damper
(Fig.
21).
Space
the
marks approx:imately
120
0
apart
so
that with
the
timing
mark,
the
damper
is
divided into
three
equal
parts
(120
0
represents 1h
of the dis-
tance around the damper circumfer-
ence).
3.
Rotate
the
crankshaft until No.
I
piston
is
near
T.O.C.
at
the end of
the
compression
stroke.
Number
1
piston
is on
TO.C.
at
the end of the
compression
stroke
when
both valves
are
closed
and the
timing
mark
on
the
crankshaft
damper is
in
line
with
!Jle
timing pointer.
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