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bly,
manifold
assembly,
ignition
coil,
the water
outlet
and
thermostat. Valve
Juides
are
cast
integral in the head.
fhe
valves
are
arra
nged
from front
to
rear
E-
I-I-E-I-E-E-
I-E-I-I-E.
CYLINDER BLOCK
The
cylinders are numbered
from
1-6
starting
at the front
of
the
engine.
The firing
order
is
1-5-3-6-2-4.
T
he oi
l
pump
is
mounted inside the
engine
block near
the
front
.
The dis-
tfibutor
is
located
on the right side
of
the
engine nea
r
Ihe front
and
drives
the
oi
l
pump through an in-
termediate drive
shaft
.
The
crankshaft
is
supported by
four
insert-ty
pe main
bearin
gs. C ra
nk-
shaft
e
nd thrust
is controlled
by Ihe
flanges
of
the
No.3 mai
n
bearing.
The pistons
have two
compression
rings
and one
o
il
control ring. The top
compression
ring
is
chrome-plated
and
the
lower compression ring
is
phosphate-coated.
The
oil
control
ring assembly consists
of
a
serrated
spring and
two
chrome-plated
steel
rails.
FIG.
4_lubrication
System
PART 1-2 - 223
SIX
ENGINE
VALVE TRAIN
The
intake
and
exhaust valve
as-
semblies are
the rotati
ng-type
which
rota
te each
time
the
valve opens
and
closes.
The
push
rods
are one·piece
tubular
stee
l with
oil
cushioned
sockets.
The
tappets
are the solid
steel,
mushroom-
type.
Valve
lash
is maintained
by
self
lock
ing
adj
usting
screws.
The
camshaft
is
supported
by
four
insert-type bearings pressed into the
block
and
is
driven by a
sprocket and
timing cha
in
in mesh
with
a
sprocket
on the
crankshaft. Camshaft
th rust is
controlled
by
a
thrust
washer
located
between the camshaft
sprocket and
the front journal
of
the
camshaft
. An
eccentric,
made
integral
with the
cam-
shaft,
operates
the
fue
l
pump.
LUBRICATION SYSTEM
Oil
from the
oil
pan
sump
is forced
through the pressure-type
lubrication
system
(Fig.
4)
by
a
gear-type pump.
A
spring loaded
relief
valve
in the
1·21
pump limits
the maximum
pressure of
the system. Oil relieved
by
the
valve
is directed
back
to the
intake side
of
the pump.
A
ll
the oil discharged by the pump
passes
through
a
fu
ll
flow-type filter
before
it
enlers
the
engine. The filte
r
has
an
integral relief valve
and
mount-
ing
gasket.
The
relief valve
permits
oil
to
bypass
the filter if it becomes
clogged,
th
e
reby
maintaining an
emergency
supply
of
oil
to
Ihe engine
at
all
times.
An
anti-drain
back
dia-
phragm
prevents a
reverse
flow of
oil
when
the
engi ne
is stopped.
From
the
filter,
the
oi
l
flows
into
the main
oi
l
gallery.
The
oil ga llery
supplies oi
l
to all
the
camshaft
and
main
bearings
through
a
drilled
pas-
sage
in
each main
bearing
web.
T he timing
chain
and sprockets
are
lubricated thro
ugh
a
flat
on
the
No.
I
camshaft
bearing.
Oil
slingers
are provided to pre-
vent
leakage by directing oil away
from the crankshaft
front
and rear
oil
seals.
1308_.
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