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GROUP 1
GROUP 1
-ENGINE
AND
EXHAUST SYSTEM
The
1963
maintenance
recommen
dations
are
in
Group
12
and
the
1963
specifications are
in
Group
13
of
this
manual.
All
the
service
procedures
out
lined in
Group
I
of
the
1962
Shop
Manual apply for both
the
1963 390
4-V
engine
and
the
390 6-V High
Performance
engine with
the
follow
ing
exceptions.
390 4-V
ENGINE (Part
1-1)
CAMSHAFT
The
camshaft and related parts are
shown
in Fig. 3.
Removal
1.
Refer
to
"Valve Rocker Arm
Shaft
Assembly
Removal"
(page
1-15,
1962
Shop
Manual)
and
re
move
the
valve
rocker
arm
shaft
assemblies.
2.
Remove
the
cylinder
front
cover
following
steps
1
thru
16
under
"Cyl
inder Front Cover
and
Timing
Chain
Removal"
(page
1-23,
1962
Shop
Manual).
3. Remove
the
valve push rods
in
sequence
and
place
them
in
a rack
so
that
they
can
be
installed in
their
original positions.
4.
Position
an
inspection
light
through
a push rod
opening
and
into
the
valve
push
rod
valley (Fig.
55,
page
1-26,
1962
Shop
Manual). Re
move
the
valve
lifters
with
a magnet
through
the
push
rod
openings.
In
some
cases,
it
will
be necessary
to
transfer the
lifter
over
to
an
adjoining
push rod
opening in
order
to
remove
it. Place
the
lifters in
a
rack
so
that
they
can
be installed in
their
origi
nal positions.
5. Install
a
dial indicator
so
the
indicator
point
is
on
the
camshaft
sprocket
retaining
screw.
Push
the
camshaft
toward the
rear of
the
en
gine
and
set
the
dial indicator
on
zero.
Pull
the
camshaft
forward
and
release
it.
Compare
the
indicator
reading
with
the
specifications.
If
the
end
play
is
excessive,
check
the
spacer
for
correct
installation before
it is
removed.
The
side
of
the
spacer
having
a
chamfer on
the
ID
must
be
against
the
camshaft
front
jour
nal.
If
the
spacer
is
installed
cor
rectly,
replace
the thrust
plate.
6. Remove
the
dial indicator.
Re
move
the
camshaft
sprocket
cap
screw,
lock
washer,
flat
washer,
and
fuel pump
eccentric.
7. Slide
both
sprockets
and
the
timing
chain
forward,
and
remove
the
sprockets and
timing
chain as an
assembly (Fig.
49,
1962
Shop
Man
ual).
8. Remove
the
oil
pan
and
oil
pump
by following
the
procedure
under
"Oil Pan
and
Oil
Pump
Re
moval"
(page
1-32,
1962
Shop
Manual).
9. Remove
the
camshaft
thrust
plate
and
spacer.
Carefully
remove
the
camshaft
by
pulling
it
toward the
front
of
the
engine.
Use
caution
to
avoid
damaging
the
camshaft bear-
BEARINGS
CAMSHAFT REAR
BEARING
BORE
PLUG
TIMING CHAIN
AND
CAMSHAFT SPROCKET
FLAT WASHER
-
A1275-B
FIG. 3-Camshaft
and
Related Parts
ings.
Installation
1. Oil
the
camshaft
and
apply
Lubriplate
to
the
lobes.
Carefully
slide
the
camshaft
through the
bear
ings. Install
the
thrust
plate.
Install
the thrust
plate with
the
side
having
a chamfered
ID
against
the
camshaft
front
journal. The
oil groove
in
the
thrust
plate
must
be
above
the
camshaft,
and
it
must
face
towards
the
front
(against
the
camshaft
sprocket).
2. Follow step 5
under
"Camshaft
Removal"
and
check
the
camshaft
end
play.
3. Position
the
sprockets
and
tim
ing
chain on
the
camshaft and crank
shaft
with
the
timing
marks
on
the
sprockets
aligned
as
shown
in Fig.
48,
page
1-24,
1962
Shop
Manual.
4. Install
the
fuel pump
eccentric,
flat
washer,
lock
washer,
and sprocket
cap
screw.
Torque
the
sprocket
cap
screw
to
specifications.
Install
the
front
oil slinger.
5.
Replace
the
crankshaft
front
oil
seal.
Install
the
cylinder
front
cover,
the
crankshaft
damper,
and
related
parts
following
steps
3
thru
16
under
"Cylinder
Front Cover
and
Timing
Chain
Installation"
(page
1-24,
1962
Shop
Manual).
6. With No.
1
piston
on
TDC
at
the
end
of
the
compression
stroke,
position
the
distributor in
the
block
with
the
rotor
at
the
No.
1
firing
position
and
the
points open.
Install
the
hold down
clamp.
7. Connect
the
distributor
vacuum
line. Install
the
distributor
cap.
Con
nect
the
coil
high
tension
lead.
8. Install
the
valve
lifters in
the
bores
from
which
they
were
re
moved.
Install
the
push rods.
9. Refer
to
"Valve
Rocker Arm
Shaft
Assembly
Installation"
and
in
stall
the
valve
rocker
arm
shaft
as
sembly
following
steps
1
thru
9,
page
1-16,
1962
Shop
Manual.
10. Fill
and
bleed
the
cooling
sys
tem.
Fill
the
crankcase
with
the
proper grade and
quantity
of
eneine
oil.
11. Start
the
engine and check and
adjust
the
ignition
timing.
Operate
the
engine
at
fast idle
and
check
all
hose
connections
and
gaskets
for
leaks.
Cleaning
and
Inspection. Refer
to
the
1962
Shop
Manual for
clean
ing
and
inspection
procedures.
I
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