'Jeep'
UNIVERSAL
and
'Jeep'
DISPATCHER.
E
F4-134 ENGINE
MODELS CJ-3B, CJ-5, CJ-6
Contents
SUBJECT
PAR.
Assembly,
Engine....
.
..............
E~79
Camshaft
.....................
E-28,
E-53,
Ec82
Clutch
.............................
E-24,
E-90
Connecting
Rods
...............
E-19,
E-36 E-96
Crankcase
Ventilator
Valve
..........
E-14,
E-111
Crankshaft
....................
E-26,
E-38,
E-83
Crankshaft
End
Play
......................
E-85
Crankshaft
Main
Bearings
.................
E-44
Crankshaft
Pulley
.........................
E-12
Crankshaft
Rear
Bearing
Seal.
........
E-65,
E-86
Cylinder
Block.
. . . .
...................
E-32
Cylinder
Bores
...........................
E-35
Cylinder
Head
.................
E-16, E-74,
E-99
Disassembly,
Engine.
.
.................
E-6
Flywheel.
.....................
E-25,
E-69,
E-89
Ground
Strap
.........
,
...................
E-4
E-1.
GENERAL
Engine
service
and
repair
is
covered
in
this
section
in
the
following
manner:
a.
General
description
of
the
engine.
b.
Removal
of
the
engine
from
the
vehicle.
c.
Complete
engine
disassembly
out
of
the
vehicle.
Special
instructions
are
included
with
some
opera-
tions
to
cover
differences
required
when
disas-
sembly
is
done
with
the
engine installed.
d.
Inspection
and
repair
of
engine
·components
with
the
parts
removed.
e.
Engine
reassembly
with
the
engine
removed
from
the
vehicle.
The
final
paragraphs
cover
valve
adjustment,
oiling
system
of
the
engine,
and
crankcase
ventilation.
E-2. Description
The
Model
F4-134 engine is
an
F
-head
four-
cylinder
engine
of
combination
valve-in-he~d
and
valve-in-block
construction.
Large
intake
valves
mounted
in
the
head
allow
rapid,
unobstructed
flow
of
fuel
and
air
to
the
combustion
chambers
~hrough
short,
water-jacketed
intake
passages.The
mtake
valves
are
operated
by
push
rods
through
rocker
arms.
The
exhaust
valves
are
mounted
in
the
block
with
through
water
jacketing
to
provide
effective cooling.
The
exhaust
valves
are
operated
by
conventional
valve
tappets.
T~e
engine is
pressure
lubricated.
An
oil
pump
dnven
from
the
camshaft
forces
the
lubricant
through
oil
channels
and
drilled
passages
in
the
crankshaft
to
efficiently
lubricate
the
main
and
connecting
rod
bearings.
Lubricant
is also force
fed
to
the
camshaft
bearings,
rocker
arms,
timing
gears,
etc.
Cylinder
walls
and
piston
pins
are
i.\
SUBJECT
PAR.
Inspection
and
Repair
.....................
E-31
Manifold
...........................
E-8,
E-102
Oil
Filler
Tube
......
: .
..............
E-9,
E-103
Oil
Filter
...............................
E-112
O~IPan
.......................
E-18, E-68,
E-98
0
0
~1
1
_Pumsp.
·
...................
E-13, E-67,
E-94
..
1
mg
ysten1.
.........................
E-110
Pistons
.......................
E-19, E-36,
E-96
Removal,
Engine
..........................
E-5
Rocker
Arms.............
.E-15, E-75, E-100
Tappets
and
Cover
..................
E-29,
E-64
Timing
Gears
and
Cover
.......
E-20, E-56, E-84,
E-92, E-95
Valve
Adjustment
.......................
E-107
Valves, Springs,
and
Guides
.....
E-27, E-58, E-91
Water
Outlet
Fitting......
.
.....
E-10, -E-105
Water
Pump............
.
.....
E-7,
E-104
lubricated
from
spurt
holes
in
the
"follow'; side
of
the
connecting
rods.
Circulation
of
the
coolant
is
controlled
by
a
thermostat
in
the.
water
outlet
elbow
cast
as
part
of
the
cylinder
head.
The
cylinder
head
assembly
when
installed
on
the
engine
~onsists
of
the
inlet
valve
guides,
inlet
valves,
mlet
valve
springs,
rocker
arm
and
shaft
assemblies,
spark
plugs,
temperature
indicator
fitting,
water
outlet
fitting,
and
other
assembled
parts.
The
carburetor
and
air
cleaner
assembly
bolt
to
the
top
of
the
cylinder head.
The
rocker
arm
cover
is
attached
to
the
top
of
the
head
to
enclose
the
inlet
valve
mechanism.
The
engine is
equipped
with
a fully
counterbalanced
crankshaft
supported
by
three
main
bearings.
To
better
control
balance,
the
counterweights
are
in-
dependently
forged
and
permanently
attached
to
the
crankshaft
with
dowels
and
cap
screws
that
are
tack-welded.
Crankshaft
end
play
is
adjusted
by
shims
placed
between
the
crankshaft
thrust
washer
and
the
shoulder
on
the
crankshaft.
The
exhaust
manifold is a
separate
unit.
The
intake
manifold
is
cast
as
an
integral
part
of
the
cylinder
head
and
is
completely
water
jacketed.
This
con-
structio~
transfers
heat
from
the
cooling
system
to
the
mtake
passages
and
assists
in
vaporizing
the
fuel
when
the
engine is cold.
Therefore
there
is
no
heat
control
valve
required
in
the
e~aust
manifold.
Individual
exhaust
ports
in
the
cylinder
block
direct
gasses
into
the
exhaust
manifold for
unobs~ructed
flow
through
the
exhaust
system.
The
p1stons
have
an
extra
groove
directly
above
the
top
ring
which
acts
as
a
heat
dam
or
insulator.
Text
continued
on
page
60.
57
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