'Jeep*
UNIVERSAL SERIES
SERVICE
MANUAL
D
insulator
mountings attached to the frame side
rail
brackets. The
rear
of the engine-transmission
assembly is supported by a rubber insulator
mounting under the
rear
of the transmission on
the frame center cross member.
This
cross member
is bolted to the frame side
rails
so that it can be
dropped when removing the transmission or engine-
transmission
assembly. The rubber insulators allow
free side and vertical oscillation to effectively
neutralize
engine
vibration at the source.
The
rubber
insulator mountings should be inspected
for separation and deterioration by jacking the
power plant away from the frame, near the sup
ports. Vibration cannot be effectively absorbed by
separated or worn insulators. They should be re placed if faulty.
D-4.
Engine
Ground
Strap
To
be sure of an
effective
ground for the electrical
circuits,
a ground strap bridges the right front
engine
support to the chassis. The connections of this strap must be kept clean and tight for proper
operation of the electrical system.
D-5. ENGINE REMOVAL
Should
the
engine
require overhauling, it is neces
sary
to remove it from the vehicle. The following procedure covers removal of the
engine
only.
The
engine, transmission and transfer case may be
removed as a unit by removing (in addition to the following procedure) the radiator guard and the
access plates in the floor pan.
a.
Drain
the cooling system by opening the
drain
cocks at the
bottom
of the radiator and lower right
side of the cylinder block.
b.
Disconnect the battery at the positive terminal
to avoid the possibility of short
circuit.
c. Remove the air cleaner horn from the carburetor
and
disconnect the breather
hose
at the oil filler
pipe.
d.
Disconnect the carburetor choke and throttle controls by loosening the clamp
bolts
and set
screws.
e. Disconnect the fuel-tank-to-fuel-pump line at the fuel pump by unscrewing the connecting nut.
f- Plug the fuel line to prevent fuel leakage.
g. Remove the radiator and radiator grille support
rods.
h. Remove the upper and lower radiator
hoses
by
loosening the
hose
clamps and slipping the clamps
back
on the
hose.
If so equipped, remove the heater
hoses
(one to the water pump, one to the
rear
of
the cylinder head) in the same manner.
i.
Remove the four
bolts
from the fan hub and re
move
the fan hub and fan blades.
j.
Remove the four radiator attaching screws. Re
move
the radiator and shroud as one unit, k. Remove the starting motor cables. Remove the
starting
motor.
I.
Disconnect the wires from the alternator or
generator. Disconnect the ignition
primary
wire
at the ignition coil.
NOTE:
ON
ENGINES EQUIPPED WITH EX
HAUST
EMISSION CONTROL, REMOVE THE
AIR
PUMP,
AIR
DISTRIBUTION
MANI
FOLD,
AND
ANTI-BACKFIRE (DIVERTER)
VALVE.
SEE SECTION
Fl
FOR PROCEDURE.
m.
Disconnect the oil pressure and temperature
sending unit wires at the units.
n.
Disconnect the exhaust pipe at the exhaust
manifold by removing the stud nuts.
o.
Disconnect the
spark
plug cables at the plugs
and
remove the cable bracket from the rocker arm cover stud.
p.
Remove the rocker arm cover by removing the
attaching stud nuts.
q.
Attach a lifting bracket to the
engine
using
existing head bolt locations. Be sure the
bolts
selected
will
hold the
engine
with the weight
balanced.
Attach lifting bracket to a boom hoist,
or
other lifting device, and take up all slack,
r.
Remove the two nuts and
bolts
from each front
engine
support. Disconnect the
engine
ground strap.
Remove the
engine
supports.
Lower
the
engine
slightly to permit access to the two top
bolts
on
the flywheel housing.
s. Remove the
bolts
which attach the flywheel
housing to the engine.
t.
Pull
the
engine
forward, or
roll
the vehicle back
wards,
until the clutch clears the flywheel housing.
Lift
the
engine
from the vehicle.
D-6. ENGINE DISASSEMBLY
Engine
disassembly is presented in the sequence to be followed when the
engine
is to be completely
overhauled after removal from the vehicle. Some
of the operations of the procedure are also ap
plicable
separately with the
engine
in the vehicle,
provided
that wherever necessary the part of the
engine
to be worked on is first made accessible by
removal
of
engine
accessories or other parts.
When
the disassembly operations are performed
with
the
engine
out of the vehicle, it is assumed,
in
this procedure, that all of the accessories have been removed
prior
to starting the disassembly
and
the oil has been drained.
In
addition to the instructions covering operations
for disassembling the
engine
out of the vehicle,
special
instructions are given to cover different
operations required when disassembly is
done
with the
engine
installed.
During
disassembly operations, the
engine
should
be mounted in a suitable
engine
repair
stand. Where
practicable,
modify or adapt an existing repair
stand
as necessary to accommodate the engine. If
an
engine
repair stand is not used, take care to
perform
disassembly operations in a manner that
will
protect personnel against an accident and the
engine
and its parts against damage.
NOTE:
If the
engine
is being disassembled because
of possible valve failure, check the valve tappet
clearance
before disassembly. Improper valve
clearance
could be the possible cause of valve
failure,
indicating a need for more frequent valve
checks and adjustments. 41
