1953 JEEP DJ oil pressure

'Jeep*
UNIVERSAL
SERIES
SERVICE
MANUAL

D D-l 13. HURRICANE
F4
ENGINE SPECIFICATIONS

MODEL:
ENGLISH
ENGINE:

Type

Number of Cylinders

Bore
Stroke
Piston Displacement...........
Bore
Spacing (center to center): 1 and 2, 3 and 4
2 and 3

Firing
Order Compression Ratio Compression Pressure... .
Number of Mounting Points:

Front
Rear

Horsepower (SAE)
Horsepower (Max Brake) Maximum Torque @
2000
rpm.
PISTONS:

Material
Description

Length
,.
Diameter (near
bottom
of
skirt).

Weight.
Clearance
Limits:
Piston-To-Cylindcr
Bore

Ring
Groove Depth:
No. 1 and 2 Ring No. 3 Ring

Ring
Groove Width:
No. 1 Ring No. 2 Ring
No. 3 Ring
Piston Pin Hole Bore
Cylinder
Bore — Standard.....
—
max. out of round
F-Head

4

W

134.2 cu. in.

3.437"

4.938"

1-3-4-2
6.7:1
120 to 130 psi.
2
1
15.63

@
4000
rpm. 114 lb-ft. 75

-
max. taper..

-
max. rebore.

PISTON RINGS:
Function:

No. 1 and 2 No. 3. .

Material:

No. 1. .
No. 2 and 3

Width;
No. 1 and 2
No. 3. . . .

Gap
(Std. to .009 Cyl. Bore).
Thickness:
No. 1 and No. 2 Rings....
No. 3 Ring
Side Clearance in Groove:
No. 1 Ring No. 2 Ring
No. 3 Ring

PISTON
PINS:
Material

Length
Diameter

Type

Clearance
in Piston
(selective
fit).
Aluminum
Alloy

Gam
Ground, T-slot, Tin Plated

3.1225*
to
3.1245*
13.5 oz.
Selective Feeler Fit
.1593" to .1655"
.1693" to .1755"
.0955" to .0965" .095" to .096"
1875" to .1885" .760" to .770"

3.125"
to
3.127"
.005" .005" .040"
Compression
Oil

Cast
Iron,
Chrome-plated Face
Cast
Iron

.007" to .017"
.134" to .144" .115" to .125"
.002" to .004"
.0015" to .0035" .001" to .0025"

SAE
1016 Steel
2.781"
.8119"

Locked
in Rod

.0001"
to .0003"
METRIC

7,937
cm.

11,112
cm. 2199 cm*

8,729
cm.

12,542
cm.
8,4 a 9,2 kg-cm2
15,77 kg-m.
9,525
cm.

7,9311
a
7,9362
cm.

382,7
gr.

4,046
a
4,203
mm.
4,300
a
4,457
mm.

2,4257
a
2,4511
mm. 2,413 a
2,438
mm.

4,7625
a
4,7879
mm.
19,304
a
19,558
mm.
7,9375
a
7,9425
cm.

0,1270
mm.

0,1270
mm.
1,0160
mm.
2,38 mm.
4,76 mm.
0,178 a
0,432
mm.

3,403
a
3,657
mm. 2,821 a 3,175 mm.
0,051 a 0,102 mm.
0,038
a
0,088
mm.

0,025
a
0,063
mm.

70,637
mm.

20,6223
mm.

0,0025
a
0,0076
mm. 71

'Jeep'
UNIVERSAL SERIES SERVICE
MANUAL

D
D-l 13. HURRICANE
F4
ENGINE SPECIFICATIONS
(Continued)

MODEL:

VALVE
SYSTEM:
(Continued) Timing: Intake:
Opens Closes
Duration
Exhaust: Opens
Closes Duration
Valve Opening Overlap
Valves: Intake: Material
Length Over All. Head Diameter.
.........

Angle
of Seat.
Stem
Diameter
Stem-to-Guide
Clearance..

Lift

Exhaust: Material
Length Over All Head Diameter

Angle
of
Seat Seat
Insert Material

Stem
Diameter

Stem-to-Guide
Clearance..
Lift

Springs: Intake:
Free
Length Standard: Pressure % Length: Valve Closed........
Valve Open
Service Minimum: Pressure @ Length: Valve Closed Valve Open
Exhaust:
Free
Length Pressure @ Length: Standard: Valve Closed
Valve Open
Service Minimum: Valve Closed. Valve Open

LUBRICATION SYSTEM:
Type of Lubrication:

Main
Bearings Connecting Rods
Piston Pins Camshaft Bearings
Tappets
Timing Gears.'.
Cylinder
Walls

Oil
Pump: Type Drive
Minimum
Safe
Oil Pressure:
At
Idle
At
2000
rpm. (35 mph.)..
Relief Valve Opens Normal Oil Pressure

Oil
Pressure
Sending
Unit

Oil
Intake
Oil
Filter
System
ENGLISH
9°
BTC

50°
ABC
239°

47°
BBC 12* ATC
239°
21°
SAE
5150
4.781"
2*

46°

.3733"
to
.3738"
.0007"
to
.0022'
.260"
Uniloy 21-12
5.909"
1.47"

46°

Eatonite EMS 58 .371" to .372"

.0025"
to
.0045'

.351"
1.97"
73 lb. @ 1.66"
153 lb. @ 1.40* 66 lb.
140 lb. 1.66*

)
1.40" 53 lb. (
120 lb.
2.109"

\
1.750*

47 lb. @2W
110 lb. @ l%*
Pressure
Pressure Splash
Pressure
Splash

Nozzle
Nozzle

Internal
Rotor
Camshaft
Gear

6 psi.
20 psi.
40 psi.
35 psi. @
2000
rpm.
Electric

Floating

Partial
Flow
METRIC

12,14 cm. 5,08 cm.
9,481 a
9,494
mm.

0,0178
a
0,0559
mm.
6,604
mm.

15,008
cm.
3,733
cm.

9,423
a
9,449
mm.

0,0635
a
0,1143
mm. 8,915 mm.

5,003
cm.
33,1 kg.
(i(<
4,216 cm.
69,4 kg. (a.
3,556
cm.
29,9 kg. (d 4,216 cm.
63,5 kg. ((i
3,556
cm.

6,350
cm.
24 kg. (a
5,356
cm.
54,3 kg. (a
4,445
cm.
21,3 kg. (n 5,
356cm.

49,9 kg. («
4,445
cm.
0,4 kg-cm2 1,4 kg-cm2
2,8 kg-cm2
2,4 kg-cm2 @
2000
rpm. 73

'Jeep'
UNIVERSAL SERIES
SERVICE
MANUAL

Dl

DAUNTLESS
V-6
ENGINE
Contents

SUBJECT
PAR.
SUBJEC

GENERAL
.... . . Dl-1 Oil Pump Cl(
ENGINE DESCRIPTION
D1-2

Engine
Mounts Dl-3

ENGINE REMOVAL
Dl-4
ENGINE DISASSEMBLY
Dl-5
Alternator
and Fan Belt Dl-11
Camshaft
.... Dl-26
Cooling Fan and Water Pump.
......
.Dl-12
Crankshaft
Front Oil Seal .Dl-21

Crankshaft
Pulley D1-17
Crankshaft
Vibration Damper Dl-18

Cylinder
Head Assembly Dl-24

Distributor
Dl-9
Exhaust
Manifold .Dl-8

Flywheel
Dl-28

Flywheel
Housing and
Clutch
Dl-27
Fuel
Pump. ... . .Dl-10
Intake
Manifold and
Carburetor
Assembly.
.............
.Dl-7

Main
Bearing and Crankshaft. Dl-32 Mounting Engine on Engine Stand. . . . .Dl-6

Oil
Dipstick. Dl-16
Oil
Filter
Dl-13
Oil
Pan.. ...
.......
.Dl-29
Oil
Pressure Sending Unit Dl-15

Oil
Pump Dl-19
Oil
Pump Intake Pipe and Screen Dl-30
Piston and Rod Assembly. Dl-31
Push
Rod and Valve
Lifter.
.Dl-25
Rocker
Arm Cover Dl-23
Starter
Motor Dl-14

Timing
Chain
and Sprocket Dl-22
Timing
Chain
Cover Dl-20

ENGINE CLEANING, INSPECTION AND REPAIR
. . ... .Dl-33
Camshaft
Cleaning and Inspection Dl-55
Connecting Rod Bearing Inspection
and
Fitting .Dl-49

Crankshaft
Cleaning Dl-38
Crankshaft
Inspection and Repair Dl-39
Crankshaft
Main Bearing Cleaning
and
Inspection Dl-41

Crankshaft
Main Bearings. Dl-40

Crankshaft
Pulley Inspection. Dl-70
Crankshaft
Vibration Damper Inspection. D1-69

Cylinder
Block .Dl-34
Cylinder
Block Cleaning Dl-35
Cylinder
Block Inspection Dl-36

Cylinder
Block Repair. .Dl-37
Cylinder
Head and Valve Repair .Dl-63

Cylinder
Head and Valve Cleaning
and
Inspection.. . .Dl-62

Flywheel
Cleaning and Inspection Dl-52

Flywheel
Housing Cleaning
and
Inspection Dl-54

Hydraulic
Valve
Lifter
Leakdown Test. .Dl-57
Main
Bearing Fitting or

Shim
Stock Dl-42, Dl-43

Oil
Pan Cleaning and Inspection .Dl-51
PAR.
and
Inspection. .... .Dl-68

Oil
Pump Intake and Screen Cleaning. . .Dl-50
Piston and Rod Assembly.
...........
.Dl-48
Piston and Rod Cleaning and Inspection.D1-45
Piston and Rod Disassembly Dl-44
Piston Fitting Dl-46
Piston Ring Fitting. .Dl-47

Ring
Gear
Replacement. .Dl-53
Rocker
Arm Assembly. Dl-60
Rocker
Arm Cleaning and Inspection. . .Dl-59

Rocker
Arm Cover Cleaning

and
Inspection D1-65

Rocker
Arm Disassembly .Dl-58
Timing
Chain
and Sprocket Inspection. . .Dl-66

Timing
Chain
Cover Cleaning

and
Inspection.. . Dl-67

Valve
Installation D1-64
Valve
Lifter
and Push Rod

Cleaning
and Inspection. . Dl-56

Valve
Removal Dl-61

ENGINE REASSEMBLY
Dl-71
Alternator
and Fan Belt Dl-96

Camshaft
Dl-80
Clutch
and Flywheel Housing Dl-79
Cooling Fan.. . .Dl-95
Crankshaft
End Play Check. . Dl-74

Crankshaft
Front Oil Seal Dl-85
Crankshaft
Pulley Dl-89
Crankshaft
Vibration Damper Dl-88
Cylinder
Block and Crankshaft
Rear
Oil Seals Dl-72

Cylinder
Head Assembly .Dl-82

Distributor
Dl-99

Exhaust
Manifold Dl-98
Flywheel
.Dl-78
Fuel
Pump.. .. . Dl-97
Intake
Manifold and Carburetor Assembly Dl-101

Main
Bearing and
Crankshaft
Installation
.
Dl-73

Oil
Filter
Dl-93
Oil
Level
Dipstick Dl-90

Oil
Pan Dl-77
Oil
Pressure Sending Unit Dl-91

Oil
Pump.. .Dl-87
Oil
Pump Intake and Screen Assembly. .Dl-76
Piston and Rod Installation Dl-75

Rocker
Arm Cover. Dl-83

Spark
Plugs.. Dl-100
Starter
Motor Dl-92
Timing
Chain
and Sprocket.
..........
.Dl-84

Timing
Chain
Cover Dl-86
Valve
Lifter
and Push Rod Dl-81

Water
Pump. Dl-94

ENGINE INSTALLATION
Dl-102

FINAL
IN-VEHICLE
ADJUSTMENTS.
D1-103

SERVICE
DIAGNOSIS
Dl-104
ENGINE SPECIFICATIONS
. .Dl-105 75

'Jeep'
UNIVERSAL SERIES SERVICE
MANUAL

Dl

©©©©©©©©©

12697

FIG.
Dl-1—DAUNTLESS
V-6
ENGINE, SIDE SECTIONAL VIEW

1—
Fan
Blade
2—
Fan
Spacer

3—Fan
Pulley
4—
Water
Pump 5—
Timing
Chain
Cover
6—
Camshaft
Sprocket
7—
Thermostat
Bypass Hose
8—
Thermostat
Housing
9—
Thermostat

10—
Carburetor

11—
Intake
Manifold
12—
Rocker
Arm Cover 13—
Cylinder
Block 14—
Push
Rod
15—
Camshaft

16—
Flywheel
17—
Clutch
Pressure Plate
18—
Clutch
Driven Plate
19—
Clutch
Pilot Bearing
20—
Oil
Seal Packing
21—
Rear
Main
Bearing Shell
22— Connecting Rods
23—
Rear
Center
Main
Bearing Shell
24—
Oil
Screen
25—
Oil
Screen Pipe and Housing
26—
Oil
Pan 27—
Front
Center
Main
Bearing Shell
28—
Crankshaft

29—
Front
Main
Bearing Shell
30—
Timing
Chain

31—
Crankshaft
Sprocket
32—
Oil
Slinger
33—
Oil
Shedder 34 Oil Shedder Packing
35—
-Woodruff
Key
36—
"Vibration
Damper
37—
Crankshaft
Pulley
38—
Fan
Belt matic adjuster, to prevent lash in the valve operat­
ing linkage. Hydraulic valve lifters also provide

a
cushion of oil to absorb operating shocks. As shown in Fig. Dl-3, all parts of a hydraulic lifter

are
housed in the body, which is the cam follower.

At
the beginning of valve operation, the valve lifter body rests on the camshaft base circle.

Plunger
spring tension prevents lash clearances in the valve linkage.

As
the camshaft forces the valve lifter body up­

ward,
both oil in the lower chamber and check

ball
spring
tension firmly seat the check ball against the plunger to prevent appreciable
loss
of oil from
the lower chamber. Oil pressure forces the plunger
upward,
with the body, to operate the valve linkage.

As
the camshaft rotates to closed-valve position, the valve spring forces the linkage and lifter down­

ward.
When the
engine
valve seats, the linkage

parts
and plunger stop, but the plunger spring forces
the body downward .002" to .003"
[0,050
a
0,076
mm.] until it again rests on the camshaft base

circle.
Oil pressure then forces the check ball away

from
its seat and allows passage of oil past the check ball into the lower chamber.
This
replaces
the slight amount of oil lost by leakage. During
the valve opening and closing operation, a very
slight amount of oil escapes
between
plunger and body, and returns to the crankcase.
This
slight
loss
of oil (leak-down) is beneficial. It provides a
gradual
change of oil in the valve lifter; fresh oil
enters the lower chamber at the end of each cycle
of operation. 77

01
DAUNTLESS
V-6
ENGINE
14358

FIG.
Dl-2—DAUNTLESS
V-6
ENGINE, FRONT SECTIONAL VIEW

1—
Exhaust
Valve
2—
Exhaust
Valve Spring
3—
Rocker
Arm Cover
4—
—Exhaust
Valve Spring Retainer 5—
Exhaust
Rocker Arm
6—
Rocker
Arm Shaft 7— push Rod
8— Tappet
9— Tappet Cover 10—
Cylinder
Head
11—
Rocker
Arm Shaft
12—
Intake
Rocker Arm
13—
Intake
Valve Spring Retainer
14—
Intake
Valve Spring
15—
Intake
Valve 16—
Spark
Plug
17—
Water
Passages 18—
Exhaust
Manifold 19— Piston
20—
Camshaft
21—
Crankshaft

22—
Main
Bearing Cap
23—
Oil
Pan
24—
Crankcase

25— Connecting Rod

The
engine
is pressure lubricated. The oil pump
is located on the timing chain cover and discharges
oil
through an oil filter
into
main oil galleries in
the crankcase to deliver oil to all crankshaft and
camshaft bearings. Piston pins are lubricated by- splash. The timing chain is lubricated by splash
of an oil stream from which oil is directed to the
distributor drive gear from the fuel pump eccentric
on the camshaft. Rocker arms are lubricated from
the oil galleries in the cylinder block through pas- 78

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

'Jeep'
UNIVERSAL
SERIES
SERVICE
MANUAL

Dl

13296

FIG.
Dl-5—ENGINE
LUBRICATION
AND
COOLING
PARTS

1— Bolt and
Lock
Washer
2—
Fan
Assembly
3—
Fan
and Alternator Belt
4—
Fan
Driven Pulley 5— Water Pump Assembly
6—
Hose
Clamp 7— Thermostat Bypass
Hose

8—Hex
Head Bolt
9— Water Outlet Elbow
10— Water Outlet Elbow Gasket
11— Thermostat
12— Water Pump Gasket
13— Impeller and Insert, Water Pump
14— Water Pump Seal 15— Dowel Pin % x Vfc"
16— Water Pump Cover
17— Bolt,
1/4-20
x 1"
18— Water Pump Shaft and Bearing
19—
Fan
Hub
20—
-Oil
Suction Pipe Gasket
21—
Oil
Suction Housing, Pipe and Flange
22— Bolt,
y4-20
x s/8"
23—
Oil
Pump Screen
24—
Oil
Dipstick
25—
Oil
Pan Gasket
26—
Oil
Pan Assembly
27—
Drain
Plug Gasket
28—
Drain
Plug 29— Screw and
Lock
Washer #6-18 x %
30—
Oil
Pump Shaft and Gear
31—
Oil
Pump Cover Gasket
32— Valve Bypass and Cover Assembly
33—
Oil
Pressure Valve 34— Valve Bypass Spring
35—
Oil
Pressure Valve Cap Gasket
36—
Oil
Pressure Valve Cap
37— Screw V4-20 x lVg"
38— Screw 1/4-20 x 1W' 39—
Fan
Driving Pulley
40— Hex. Head Bolt, x 1"
Dl-13.
Remove
Crankshaft
Vibration Damper

Refer
to Fig. Dl-6.
Remove cap screw and flat washer which attach

crankshaft
vibration damper to crankshaft. Tap

vibration
damper with a soft-headed hammer to remove it from crankshaft.

Dl-19.
Remove Oil Pump
Remove five screws, oil pump cover, and gasket

from
right side of timing chain cover. Remove
two oil pump gears.

D1-20.
Remove Timing Chain Cover

Refer
to Fig. Dl-6. Remove two
bolts
which attach oil pan to timing

chain
cover. Remove five mounting bolts, timing

chain
cover, and gasket from cylinder block of
engine.

Note:
Water pump must be removed from timing

chain
cover before timing chain cover is removed

from
cylinder block.
Dl-21.
Remove Crankshaft Front
Oil
Seal

Refer
to Fig. Dl-6.
Use timing cover aligner and oil seal remover
tool
J-22248 to remove oil seal.

Dl-22.
Remove Timing Chain
and
Spocket

a.
Temporarily install vibration damper (Fig.

Dl-6)
bolt and washer in end of crankshaft.
Turn

crankshaft
so sprockets are positioned with index

marks
aligned as shown in Fig. Dl-7.
This
will

make it easier to install parts. Remove vibration
damper bolt and washer; rap the wrench handle
sharply
to start the bolt without changing position
of sprockets.

Note:
It is not necessary to remove timing chain
dampers unless they are worn or damaged and

require
replacement.
b. Remove front crankshaft oil slinger.
c. Remove bolt and special washer which retain
camshaft distributor drive gear and fuel pump
eccentric at forward end of camshaft. Remove gear
and
eccentric from camshaft. 81

'Jeep'
UNIVERSAL
SERIES SERVICE
MANUAL
Dl
A 8

j
13415

FIG.
Dl-13—USING
PLASTIGAGE
TO
MEASURE
BEARING CLEARANCE

1— Plastigage
A—Start

2—
Scale
B—Flattened

install
cap with shell and tighten
bolts
80 to 110 lb-ft. [11,1 a 15,2 kg-m.] torque.

Caution:
Do not turn crankshaft with Plastigage

in
bearing.

b.
Remove bearing cap with bearing half. The
flattened Plastigage
will
adhere either to the bear­ ing half or the
journal.
Do not remove it.
c. Using the scale printed on the Plastigage en­

velope,
measure Plastigage width at its widest
point. The number within the graduation which
most
closely corresponds to the width of Plasti­
gage
indicates the bearing clearance in thousandths
of an inch.

DI-43.
Main Bearing
Fitting,
Feeler or
Shim
Stock

A
small strip of feeler or shim stock can be used
to check main bearing clearance. The method is
simple, but care must be taken to avoid damage
to the bearing surface from excessive pressure against the strip.

a.
Cut a rectangular piece of feeler or shim stock, .001"
[.0254
mm.] thick,
i/2"
[12,70
mm.] wide, and
Vs"
[3,175 mm.] shorter than the bearing width.
Position the bearing cap to the crankshaft journal
and
cylinder block, and install two cap
bolts
loosely.

b.
Tighten alternate cap bolts, a little at a time,

until
both have
been
tightened to 35 to 45 lb-ft. [4,8 a 6,2 kg-m.] torque.
c.
Turn
the crankshaft by hand, no more than one

inch
[2,5 cm.] in either direction.

Caution:
If the crankshaft is turned too far, it
will

embed the strip in the bearing surface.
This
will
damage the bearing and also cause a false indica­tion of bearing clearance.

If
bearing clearance is correct, the strip should cause a light to heavy drag, or resistance to rotation.
If
there is little or no drag, clearance is too great;

if
the crankshaft cannot be turned, clearance is
insufficient. In either case, a different main bear­ ing must be
selected
to obtain proper clearance.

d.
Repeat
steps
a, b, and c, as necessary, to
select

proper main bearing size. After a bearing has
been

selected, remove the
test
strip from bearing on
crankshaft
journal surface; wipe both surfaces care­

fully,
and apply clean
engine
oil to both surfaces. Position the bearing cap to the crankshaft journal

and
cylinder block, and install two cap
bolts
loosely.

Tighten
alternate cap bolts, a little at a time, to

final
specified torque of 80 to 110 lb-ft. [11,1 a 15,2 kg-m.]. The crankshaft should now rotate
freely.

Dl-44.
Piston
and
Connecting
Rod
Disassembly

a.
Remove two compression rings with a piston
ring
expander. To remove oil ring, remove the two

rails
and spacer-expander, which are separate
pieces

in
each piston third
groove.

b.
From
Tool Set W-338 use support base J-6047-1
with collar J-6047-5 and driver J-6047-4 with an
arbor
press to press piston pin from piston and con­
necting rod. Mount support base and collar in press. Set driver in position and press out pin. Refer to

Fig.
Dl-14.
FIG.
Dl-14—PISTON
PIN
REMOVAL

1—
Arbor
Press

2—
Driver

3—
Piston
and Rod Assembly
4—
Collar
•
5—Support Base Dl-45.
Piston
and
Connecting
Rod
Cleaning
and Inspection

a.
Clean
carbon from piston surfaces and under­
side of piston heads, and remove all pistons rings.
Clean
carbon from ring
grooves
with a suitable tool.
Remove any gum or varnish from piston skirts with a suitable solvent.

b.
Carefully examine pistons for rough or scored
bearing surfaces, cracks in
skirt
or head, cracked

or
broken ring lands, chipping and uneven wear 87