1953 JEEP DJ coolant level

'Jeep*
UNIVERSAL SERIES SERVICE
MANUAL

B
solvent.
Wrap
the polyurethane element in a clean

dry
cloth and
squeeze
to remove all possible sol­
vent. Do not wring the element or it may
become
torn.
After cleaning, oil the polyurethane element

liberally
with
engine
oil
(SAE
10W30) and
squeeze

to evenly distribute the oil through the element and to remove
excess
oil. The element should be damp

with
oil, not dripping.
Install
the polyurethane element on the paper element, taking care to have
edges
of the polyurethane element over the plastic end plates of the paper element.

Replace
the complete air cleaner element assembly every
24,000
miles
[38.400
km.]. Replace more
frequently if there is any apparent damage or evidence of plugging.

The
crankcase ventilation filter should be replaced, not cleaned, every
6,000
miles
[9.600
km.]. The
filter
is located inside the air cleaner housing.
12992

FIG.
B-7—DRY-TYPE
AIR
CLEANER DAUNTLESS
V-6
ENGINE

1—
Crankcase
Ventilation
Filter

2—
Polyurethane
Element

3—
Paper
Element
B-27.
Steering
Gear

Check
that the steering gear lubricant is at the
level of the fill-hole. If not, add lubricant to the
level of the fill-hole with the lubricant recom­ mended in the
Lubrication
Specifications. If abnor­

mally
low, check the steering gear for possibility
of leaks.

B-28.
Cooling System
Check
the coolant level in the
radiator.
It should be

half
an inch below the neck. If not,
fill
the radiator
to
half
inch below the neck with the proper coolant.

Refer
to Section G.

If
the level of the coolant is abnormally low, check
the radiator,
hoses
and water pump for possible
leaks.
If a leak is suspected, refer to Section G.

B-29.
Clean
Exterior
of Radiator

For
proper cooling efficiency the radiator should be cleaned of foreign objects. Refer to Section G.

B-30.
Transmission
and
Transfer Case
Lubricant
Level
Cheek

•
Refer to Par. B-31 through B-33 as applicable.
B-31.
General

All
transfer cases and transmissions should be

serviced
separately even though drilled passages
are
provided for oil circulation
between
some
trans­
mission and the transfer case housings. Procedure

from
the appropriate Par. below should be fol­ lowed to check the lubricant level of the various

types
of transfer cases and transmissions.
If
the transfer case or transmission fluid levels
are
found to be abnormally low, check both units
for any possible leaks.

B-32.
Transfer
Case
:

The
transfer case fill-hole is located on the right side of the transfer case housing. To check the
lubricant
level, remove the
fill
plug.
Lubricant

should be level with this fill-hole. If not, bring up to level by adding make-up lubricant as specified

in
the
Lubrication
Specifications.

B-33.
Transmission

The
transmission fill-hole is located on the right side of the transmission housing. To check the
lubricant
level, remove the
fill
plug.
Lubricant

should be level with this fill-hole. If not, bring
up to level by adding make-up
lubricant
as specified
in
the
Lubrication
Specifications.

B-34.
Transmission and Transfer
Case
Lubricant
Change

•
Refer to Par. B-35 through B-37 as applicable.

B-35.
General

Transfer
case and transmission lubricants should
be changed at the same time.

B-36.
Transfer
Case

To
drain
the transfer case, first remove the transfer
case fill-hole plug and then the transfer case
drain-

hole
plug. Let all fluid
drain
from case.
Then
install
the transfer case drainhole plug, and
refill
the
transfer
case through the fill-hole using the correct

lubricant
as specified in the
Lubrication
Specifica­
tions.

At
30,000
mile
[48,000
km.] intervals lube the

transfer
case shift levers with
Lubriplate
No.
130AA.
Late
models have a lube fitting. To lube
older models, (without lube fitting) remove the

bottom
cover of the case, clean thoroughly and
pack
case
full
of lubricant.

B-37.
Transmission (3-Speed)

To
change the lubricant on all vehicles equipped

with
a three speed synchromesh transmission,
drain

the old fluid by first removing the fill-hole plug

and
then removing the drainhole plug. Since on

some
transmissions there are drilled passages be­ tween the transmission and transfer case that allow

oil
to circulate
between
the two units, the transfer
case should be drained before refilling the trans­

mission.

When
all the fluid is completely drained, replace
the drainhole plugs only. For the correct specifi­
cations and quantity, refer to the
Lubrication
Specifications. 15

Dl

DAUNTLESS
V-6
ENGINE
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 re­

pair
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.

Dl-6.
Mounting Engine
On
Engine Stand

Refer
to Fig. Dl-4.
a.
With
the
engine
supported by a hoist, remove
the clutch housing and clutch. Match
mark
the flywheel and the clutch cover before disassembly to assure proper reassembly.
b. Position the
engine
on the
engine
stand.
c. Release
some
tension of the hoist cables and secure
engine
to stand.

d.
Make sure the position lock on the
engine
stand
is tight to prevent the
engine
from accidentally
inverting.

e.
Release the hoist cables.
FIG.
D1
-4—ENGINE
MOUNTED
ON
STAND

1—
Spacer
J-8690-6
A—Bolt,
i/2-NC
x 3i/2"

2—
Bolt,
3/a-NC
x 4*/2" 5—Adapter 21316-J 3—
Engine
Mounting Stand
Dl-7.
Remove Intake Manifold
and

Carburetor Assembly

Disconnect crankcase vent
hose,
distributor vacuum

hose,
and fuel line from carburetor. Disconnect two distributor leads from ignition coil. Disconnect

wiring
harness from coolant temperature sending

unit.
Remove ten cap
bolts
which attach intake
manifold to cylinder heads. Remove intake mani­
fold assembly and gaskets from
engine.

Dl-8. Remove Exhaust Manifold
The
engine
has two exhaust manifolds. Remove five attaching screws, one nut, and exhaust mani­
fold from each cylinder head.

Dl-9.
Remove Distributor

Disconnect vacuum
hose
and wiring harness from

distributor.
Disconnect spark plug cables from
spark
plugs. Remove sparks plugs from
engine.
Pull

spark
plug cable retainers from brackets on rocker

arm
covers. Remove mounting screw, retainer

bracket,
and distributor from timing chain cover.
If
timing chain and sprockets are not to be re­
moved from
engine,
note
position of distributor
rotor so that it can be installed in identical position.

Dl-10. Remove
Fuel Pump
Disconnect output fuel line from fuel pump. Re­
move
two mounting bolts, fuel pump, and gasket

from
timing chain cover.

Dl-11.
Remove Alternator
and Fan
Belt

Disconnect wiring harness from alternator. Remove nut and flat washer which fasten alternator to
adjustment bracket. Pivot alternator
inward,
to­

ward
engine
cylinder block, to relieve fan belt
tension. Remove fan belt from pulleys. Remove
two attaching screws, mounting bracket, and alter­ nator from right cylinder head of
engine.

Dl-12.
Remove Cooling
Fan and
Water Pump

Refer
to Fig. Dl-5.
Remove four cap screws, lock washers, cooling fan,

fan
hub, and fan drive pulley from flange of water
pump shaft. Remove nine attaching screws, water
pump, alternator adjustment bracket, and water pump from timing chain cover.

Dl-13.
Remove
Oil
Filter

Unscrew
oil filter from
engine
oil pump.

Dl-14.
Remove Starter Motor

Disconnect wiring harness from starter motor and
solenoid. Remove two attaching screws, starter motor, solenoid, and motor attaching bracket from

engine
flywheel housing and cylinder block.

Dl-15.
Remove
Oil
Pressure Sending Unit

Disconnect wiring harness from oil pressure send­
ing unit. Remove oil pressure sending unit from

engine
cylinder block.

Dl-16.
Remove
Oil
Dipstick

Withdraw
and remove oil level dipstick and dip­

stick
tube
from
engine
cylinder block.

Dl-17.
Remove Crankshaft Pulley

Remove six attaching screws and crankshaft pulley

from
crankshaft vibration damper. 80

G
COOLING SYSTEM
engine
connections. Insert flushing gun and flush
heater core.
Care
must be taken when applying air
pressure to prevent damage to the heater core.

G-2.
Filling
Cooling System
To
fill
the cooling system, remove the
fill
cap and

fill
the tank to the top. Replace the cap and run
the
engine
at medium speed for approximately one
minute. Remove the cap and recheck the coolant level. Add more coolant if necessary to bring the level back to the top of the tank. If the cooling system is filled when the
engine
is cold, recheck the coolant level after the
engine
has warmed up.
This

will
ensure that the thermostat has opened allow­ ing complete cooling system circulation.

Always
correct any cooling system leaks before installing antifreeze. A corrosion inhibitor should be used in the cooling system to prevent the forma­
tion of rust and scale. A quality brand antifreeze containing a corrosion inhibitor should be used.

When
the antifreeze is drained in the spring, a
corrosion inhibitor should be added with the water.

Note:
Cooling system components for both V6 and

F4
engines
are shown in
Figs.
G-2 and G-3.

G-3. Draining
Cooling System

To
completely
drain
the cooling system, open the

drain
in the
bottom
of the radiator and also a

drain
on the right side of the cylinder block on the
Hurricane
F4 engine. The Dauntless V-6
engine

has two
drain
plugs, one located on each side of the cylinder block. Both plugs must be removed to
completely
drain
the cooling system.
Remove the radiator cap to break any vacuum
that may have developed.

Should
the cooling solution be lost from the system

and
the
engine
become
overheated do not
refill

the system immediately but allow the
engine
to cool or
refill
slowly while the
engine
is running. If
cold solution is poured into the radiator while the

engine
is overheated there is danger of cracking the

cylinder
block and/or cylinder head.
G-4.
Radiator Pressure
Cap

All
radiators are equipped with pressure caps which
reduce evaporation of cooling solution and make the
engines
more efficient by permitting slightly
higher operating temperatures. When operating
properly,
the pressure cap permits pressure build-up

in
the cooling system during periods of severe heat

load.
This
pressure increases the boiling point of the coolant and thus reduces overflow losses. The

effectiveness
of the cap is limited by its opening
pressure and the boiling point of the coolant (see
note
below). The pressure cap employs a spring-
loaded, rubber-faced pressure seal which presses against a seat in the radiator top tank. Spring pres­

sure
determines the opening pressure of the valve.

A
typical pressure cap is shown in Fig. G-5.

Note:
Refer to cooling system specifications (Par.

G-21)
for opening (relief) pressure when the ve­
hicle is equipped with either the
Hurricane
F4
or
Dauntless V-6 engine. If a new cap is required, always install a cap of the same type and pressure
rating
specified. It should never be altered or re­
placed by a plain cap.

A
vacuum release valve (Fig. G-5) is employed to
prevent undesirable vacuum build-up when the system
cools
down. The vacuum release valve is
held against its seat under light spring pressure.

Vacuum
in the system is relieved by the valve
which
opens
at V2 to 1 psi. [0,035 a 0,07 kg-cm2]

vacuum.
A pressure tester can be used to check and
test
the vacuum pressure rate (see Fig. G-6).
Although the mechanism of the pressure cap re­ quires no maintenance, the cap should be inspected
periodically for cleanliness and freedom of opera­ tion. The pressure cap gasket and radiator filler neck seat should also be inspected to be sure they

are
providing a proper seal. If the rubber face of
the valve is defective, a new cap should be installed.
Filler
neck reseating
tools
are commercially
avail­
able to correct minor
defects
at the surface of the seat. Follow instructions of the reseating tool manu­

facturer.

To
remove the radiator pressure cap when the
engine
coolant temperature is high or boiling, place

a
cloth over the pressure cap and
turn
counter­ clockwise about Vi
turn
until the first (pressure release)
stop
is reached. Keep the cap in this posi­
tion until all pressure is released.
Then
push cap
down and
turn
still
further until cap can be re­ moved. To install the pressure cap, place it in posi­
tion and
turn
it clockwise as far as it
will
go.

Caution:
Use extreme care in removing the radiator
pressure cap. In overheated systems, the sudden release of pressure can cause a steam flash and this

flash,
or the
loosened
cap can cause serious personal

injury.

G-5.
RADIATOR

Maintenance of the radiator consists of keeping
the exterior of the radiator core clean, the interior free from rust and scale, and the radiator free from

leaks.
Check
the cooling system fluid level and for
leaks each
2000
miles
[3.200
km.] or every 30
days, whichever occurs first.
This
exterior of the

radiator
core should be cleaned and the radiator inspected for leaks each
6000
miles
[9.600
km.]
of normal service of the vehicle. Cleaning should be performed by blowing out with air stream or water stream directed from the
rear
of the radiator.

Visual
inspection is not sufficient as the accumula­ tion of small particles of foreign material on core
surfaces can restrict cooling without closing the core openings.

Radiator
leakage occasionally results from cor­
rosion perforation of the metal but most leakage results from mechanical failure of soldered joints
when too much strain has been put on the joint.
Fractures
occur most
often
at the joint where the
radiator
inlet and
outlet
pipes are attached to the

tanks.
When the seams break, the entire soldered

joint
is
exposed
and can corrode, but breakage
rather
than corrosion is the
primary
cause of seam
leakage. Examine the radiator carefully for leaks before and after cleaning. Cleaning may uncover points of leakage already existing but plugged with
rust.
White, rusty, or colored leakage stains indicate 164

G
COOLING SYSTEM
12761

FIG.
G-10—WATER
PUMP—

CROSS-SECTIONAL
VIEW
—
DAUNTLESS
V-6
1—
Hub

2—
—Shaft
and Bearing
3—
Cover

4—
Impeller

5—
Ceramic
Seal
6—
Seal
Assembly front end of the pump body. Position the seal,

washer,
and pump seal on shaft flush against the ground seat in the water pump body. Place the

impeller
on an arbor press and press the long end
of the shaft into the impeller until the end of the shaft is flush with the hub of the impeller. Support
the assembly on the impeller end of the shaft and
press the pulley hub on the shaft until the shaft end is flush with the pulley hub. Move the shaft

in
the pump body to align the retaining wire
grooves
in the bearing and pump body and place
the bearing retaining wire in position.

G-l
5. Water Pump Removal and Replacement — Dauntless V-6 Engine

Drain
the cooling system. Remove the fan belt and remove the cooling fan and pulley from the hub on
the water pump. Disconnect the
hoses
from the
water
pump. Remove the cap screws that secure
the water pump to the timing chain cover; remove
the water pump. Do not disassemble the water

pump;
it is serviceable only as an assembly. When

replacing
the water pump, torque the water pump cap screws 6 to 8 lb-ft. [0,829 a 1,106 kg-m.].

G-16.
Antifreeze Solutions

When
water freezes it expands approximately 9%

in
volume. When water, confined in a cooling sys­
tem, freezes it exerts tremendous pressures causing
serious damage. To prevent freezing, antifreeze can
be added to the water to lower its freezing point.

The
two
types
of antifreeze commonly used today have either a methanol or ethylene glycol base,

and
contain corrosion inhibitors. The only anti­
freeze recommended for the cooling system of

'Jeep'
vehicles is ethylene glycol (permanent type).

Methanol
base antifreeze evaporates with the water
when the vehicle is operated at warmer tempera­
tures and requires more attention to avoid
loss
of
protection. Ethylene glycol base antifreeze seldom
evaporates at normal operating temperatures.

Methanol
solution is injurious to vehicle finishes.
Should
any be spilled on the vehicle, it should be
washed off immediately with a
good
supply of cold water without wiping or rubbing. Under ordi­

nary
conditions, ethylene glycol is not injurious to
vehicle finishes.

Warning.*
Drinking
ethylene glycol antifreeze or its
solutions can be harmful or fatal. Do not use anti­
freeze containers for
food
or beverages.

A
table in Par.
G-2
2
gives
the protection obtained
by the addition of various amounts cf ethylene glycol.
Before installing antifreeze, inspect the cooling sys­
tem to be sure it is clean, leak-proof, and otherwise

in
proper operating condition.
Drain
the cooling system, see Par. G-3. Pour in 3 quarts [3 ltr.] of

clean
water, add the required quantity of anti­ freeze, then add clean water to within 1" [2,54 cm.] of the top of the overflow pipe to allow for expan­
sion when hot. Run the
engine
until it is
warm.

Then
recheck the solution level.
Check
the anti­
freeze protection with a hydrometer reading.

G-l7.
Inhibited Coolant Solutions

All
'Jeep5 vehicles equipped with either the
Hur­
ricane
F4 or Dauntless V-6
engine
should use only

inhibited
year-round, permanent-type
engine
cool­
ant
solutions that are formulated to withstand two

full
calendar years of normal operation without

draining
or adding inhibitors. The
engine
cooling
system should be completely drained and the
rec­
ommended coolant installed every two years. Be-
fo
a
installing the permanent-type solution, inspect the cooling system to be sure it is clean, leakproof,

and
in proper operating condition.

Note:
Water alone, methanol, or alcohol-type anti­
freeze is definitely not recommended for 'Jeep*
Vehicles.

G-l8.
Fan Belt

The
fan, water pump, generator or alternator are
driven
by a V-belt. The drive of the V-belt is on
the side of the V. A fan belt that is too tight
will

cause
rapid
wear of the alternator or generator and
water
pump bearings. If the belt is too
loose,
it may
slip
preventing the water pump from properly cool­
ing the
engine
or the generator or alternator from
properly
charging the electrical
circuit.
Use fan belt
tension
gauge
Tool W-283 to properly adjust belt.

The
fan belt is properly adjusted when it can be
deflected Vi" [13 mm.] with strong thumb pres­

sure
applied midway
between
the fan and alter­

nator
pulleys.
Check
this adjustment and inspect the condition of the fan belt at each
engine
lubri-
168

'Jeep'
UNIVERSAL
SERIES SERVICE
MANUAL

G
cation period. It is
good
preventive maintenance to
replace a badly frayed, worn or cracked fan belt
before it breaks in operation.

To
replace the fan belt,
loosen
the attaching
bolts

at each generator or alternator brace-to-engine mounting and pivot the alternator or generator to­

ward
the
engine
to gain slack needed to install the new belt Remove the old belt. Position the new
belt over the fan pulley, over the crankshaft pulley,
then over the generator or alternator pulley.
Pull
the generator or alternator away from the
engine

until
belt tension is
firm.
Then tighten the generator

or
alternator mounting
bolts
and check the tension
as indicated above. Reset the generator or alternator as necessary for correct belt tension.
Finally,
torque
the generator or alternator mounting
bolts
25 to 35 lb-ft. [3,4 a 4,8 kg-m.].

Note:
On the Dauntless V-6
engine
when adjusting
the fan belt tension, the alternator mounting
bolts

should be torqued 30 to 40 lb-ft. [4,14 to 5,53

kg-m.].
If a fan belt tension
gauge
(W-283) is
avail­

able, proper tension should be 80 pounds [36,2 kg.].

G-l
9. Engine Overheating

An
engine
will
not be damaged by high coolant
temperatures unless the coolant boils. The pres­

surized
cooling system on the 'Jeep' vehicles raises the boiling point of the coolant solution. Should
overheating be encountered, and the fault is be­
lieved to be in the cooling system check for the
following:

a.
Proper coolant level. See
Filling
Cooling Sys­
tem Par. G-2.
b. Poor air flow.
Check
for dirty radiator core. (See Radiator Par. G-5).
Check
for faulty belt
pulley operation, worn or
loose
fan belt, or dam­ aged fan.
Clean,
repair, replace or adjust as neces­

sary.

c. Foaming coolant.
Check
for air leaks at water
pump,
hose
connection and filler cap. Tighten, re­

pair
or replace as necessary.

d.
Surging or "after boil".
Check
pressure cap and
replace if valves or gasket are faulty.
e.
External
leaks.
Check
the following for leaks:
Hoses and clamps, water pump, radiator, head gas­
ket, core plugs and drain cocks, as well as the cylin­ der head or block for
cracks.

f.
Internal
leaks.
Check
for faulty head gasket,
cracked
cylinder head or block.
g. Poor coolant flow.
Check
hose
condition, water pump, fan belt, and repair or replace as necessary. Inspect block for rust or scale, and clean and flush
the system, if necessary.

h.
Check
the temperature
gauge.
169