2002 JEEP LIBERTY weight

To read the built-in indicator, look into the sight
glass and note the color of the indication (Fig. 8). The
battery condition that each color indicates is
described in the following list:
²Green- Indicates 75% to 100% battery state-of-
charge. The battery is adequately charged for further
testing or return to service. If the starter will not
crank for a minimum of fifteen seconds with a fully-
charged battery, the battery must be load tested.
Refer to Standard Procedures for the proper battery
load test procedures.
²Black or Dark- Indicates 0% to 75% battery
state-of-charge. The battery is inadequately charged
and must be charged until a green indication is visi-
ble in the sight glass (12.4 volts or more), before the
battery is tested further or returned to service. Refer
to Standard Procedures for the proper battery charg-
ing procedures. Also refer to Diagnosis and Testing
for more information on the possible causes of the
discharged battery condition.
²Clear or Bright- Indicates a low battery elec-
trolyte level. The electrolyte level in the battery is
below the built-in indicator. A maintenance-free bat-
tery with non-removable cell caps must be replaced if
the electrolyte level is low. Water must be added to a
low-maintenance battery with removable cell caps
before it is charged. Refer to Standard Procedures for
the proper battery filling procedures. A low electro-
lyte level may be caused by an overcharging condi-
tion. Refer to Charging System for the proper
charging system diagnosis and testing procedures.
STANDARD PROCEDURE - HYDROMETER TEST
The hydrometer test reveals the battery state-of-
charge by measuring the specific gravity of the elec-
trolyte.This test cannot be performed on
maintenance-free batteries with non-removable
cell caps.If the battery has non-removable cell caps,
refer to Diagnosis and Testing for alternate methods
of determining the battery state-of-charge.
Specific gravity is a comparison of the density of
the battery electrolyte to the density of pure water.Pure water has a specific gravity of 1.000, and sulfu-
ric acid has a specific gravity of 1.835. Sulfuric acid
makes up approximately 35% of the battery electro-
lyte by weight, or 24% by volume. In a fully-charged
battery the electrolyte will have a temperature-cor-
rected specific gravity of 1.260 to 1.290. However, a
specific gravity of 1.235 or above is satisfactory for
the battery to be load tested and/or returned to ser-
vice.
Before testing, visually inspect the battery for any
damage (a cracked case or cover, loose posts, etc.)
that would cause the battery to be faulty. Then
remove the battery cell caps and check the electrolyte
level. Add distilled water if the electrolyte level is
below the top of the battery plates. Refer to Battery
System Cleaning for the proper battery inspection
procedures.
See the instructions provided by the manufacturer
of the hydrometer for recommendations on the cor-
rect use of the hydrometer that you are using.
Remove only enough electrolyte from the battery cell
so that the float is off the bottom of the hydrometer
barrel with pressure on the bulb released. To read
the hydrometer correctly, hold it with the top surface
of the electrolyte at eye level (Fig. 9).
CAUTION: Exercise care when inserting the tip of
the hydrometer into a battery cell to avoid damag-
ing the plate separators. Damaged plate separators
can cause early battery failure.
Hydrometer floats are generally calibrated to indi-
cate the specific gravity correctly only at 26.7É C.
When testing the specific gravity at any other tem-
perature, a correction factor is required. The correc-
tion factor is approximately a specific gravity value
of 0.004, which may also be identified as four points
of specific gravity. For each 5.5É C above 26.7É C, add
four points. For each 5.5É C below 26.7É C, subtract
four points. Always correct the specific gravity for
temperature variation.
EXAMPLE:A battery is tested at -12.2É C and has
a specific gravity of 1.240. Determine the actual spe-
cific gravity as follows:
(1) Determine the number of degrees above or
below 26.7É C:26.7É C + -12.2É C = 14.5É C below
the 26.7É C specification
(2) Divide the result from Step 1 by 5.5É C:14.5É
C ÷ 5.5É C = 2.64
(3) Multiply the result from Step 2 by the temper-
ature correction factor (0.004):2.64 X 0.004 = 0.01
(4) The temperature at testing was below 26.7É C;
therefore, the temperature correction factor is sub-
tracted:1.240 - 0.01 = 1.23
(5) The corrected specific gravity of the battery cell
in this example is 1.23.
Fig. 8 Built-In Indicator Sight Glass Chart
KJBATTERY SYSTEM 8F - 11
BATTERY (Continued)

FRONT FOG LAMP UNIT
REMOVAL
(1) Turn the front wheels full lock in the direction
of the fog lamp bulb that is to be changed.
(2) Disconnect and isolate the battery negative
cable.
(3) Reach into the front wheel opening to unsnap
and lift the cover over the access hole at the front of
the front wheelhouse splash shield (Fig. 14).
(4) Reach through the access hole to remove the
three screws that secure the front fog lamp unit to
the front bumper fascia.
(5) From the front of the vehicle, pull the front fog
lamp unit out of the front bumper fascia far enough
to access and disconnect the wire harness connector
for the front fog lamp unit from the lamp socket con-
nector receptacle (Fig. 15).
(6) Remove the front fog lamp unit from the front
bumper fascia.
INSTALLATION
(1) Position the front fog lamp unit to the front
bumper fascia.
(2) Reconnect the wire harness connector for the
front fog lamp to the lamp socket connector recepta-
cle (Fig. 15).
(3) Position the front fog lamp unit into the front
bumper fascia.
(4) Reach into the front wheel opening and
through the access hole to install and tighten the
three screws that secure the front fog lamp unithousing to the front bumper fascia (Fig. 14). Tighten
the screws to 3 N´m (25 in. lbs.).
(5) Lower and snap shut the cover over the access
hole at the front of the front wheelhouse splash
shield.
(6) Reconnect the battery negative cable.
(7) Confirm proper front fog lamp unit alignment.
(Refer to 8 - ELECTRICAL/LAMPS/LIGHTING -
EXTERIOR/FRONT FOG LAMP UNIT - ADJUST-
MENTS).
ADJUSTMENTS
ADJUSTMENT - FRONT FOG LAMP UNIT
VEHICLE PREPARATION FOR FOG LAMP ALIGNMENT
(1) Repair or replace any faulty or damaged com-
ponents that could hinder proper lamp alignment.
(2) Verify proper tire inflation.
(3) Clean the front fog lamp lenses.
(4) Verify that the cargo area is not heavily loaded.
(5) The fuel tank should be Full. Add 2.94 kilo-
grams (6.5 pounds) of weight over the fuel tank for
each estimated gallon of missing fuel.
FOG LAMP ALIGNMENT
Prepare an alignment screen as illustrated. A prop-
erly aligned front fog lamp will project a pattern on
the alignment screen 100 millimeters (4 inches)
below the fog lamp centerline and straight ahead of
the lamp.
Fig. 14 Front Fog Lamp Unit Remove/Install
1 - FRONT FOG LAMP UNIT
2 - SCREW (3)
3 - FRONT WHEELHOUSE SPLASH SHIELD
4 - FRONT BUMPER FASCIA
5 - ACCESS HOLE
Fig. 15 Front Fog Lamp Unit
1 - ADJUSTING SCREW
2 - MOUNTING BRACKET
3 - HOUSING
4 - SOCKET & BULB
5 - LENS
KJLAMPS/LIGHTING - EXTERIOR 8L - 25

enough to disengage the locator tab on the outboard
side of the unit (Fig. 41) or (Fig. 42) from the engage-
ment slot in the outboard edge of the reinforcement.
(5) Pull the headlamp unit away from the grille
opening reinforcement far enough to disconnect the
wire harness connectors from the headlamp bulbsocket (North America), the headlamp bulb base
(Rest-Of-World), the front position lamp socket (if
equipped), and the headlamp leveling motor (if
equipped).
(6) Remove the headlamp unit from the grille
opening reinforcement.
INSTALLATION
(1) Position the headlamp unit to the grille open-
ing reinforcement.
(2) Reconnect the wire harness connectors to the
headlamp bulb socket (North America), the headlamp
bulb base (Rest-Of-World), the front position lamp
socket (if equipped), and the headlamp leveling motor
(if equipped) (Fig. 41) or (Fig. 42).
(3) Engage the locator tab on the outboard side of
the headlamp unit into the engagement slot in the
outboard edge of the grille opening reinforcement.
(4) Align the two mounting tabs on the inboard
side of the headlamp unit housing to the mounting
holes in the grille opening reinforcement (Fig. 40).
(5) Install and tighten the two screws that secure
the mounting tabs on the inboard side of the head-
lamp unit housing to the grille opening reinforce-
ment. Tighten the screws to 3 N´m (30 in. lbs.).
(6) Reinstall the grille panel onto the grille open-
ing reinforcement. (Refer to 23 - BODY/EXTERIOR/
GRILLE - INSTALLATION).
(7) Reconnect the battery negative cable.
(8) Confirm proper headlamp unit alignment.
(Refer to 8 - ELECTRICAL/LAMPS/LIGHTING -
EXTERIOR/HEADLAMP UNIT - ADJUSTMENTS).
ADJUSTMENTS
ADJUSTMENT - HEADLAMP UNIT
VEHICLE PREPARATION FOR HEADLAMP ALIGNMENT
(1) Verify headlamp dimmer (multi-function)
switch and high beam indicator operation.
(2) If the vehicle is equipped with headlamp level-
ing, be certain that the headlamp leveling switch is
in the ª0º position.
(3) Repair or replace any faulty or damaged com-
ponents that could hinder proper lamp alignment.
(4) Verify proper tire inflation.
(5) Clean headlamp lenses.
(6) Verify that cargo area is not heavily loaded.
(7) The fuel tank should be Full. Add 2.94 kilo-
grams (6.5 pounds) of weight over the fuel tank for
each estimated gallon of missing fuel.
HEADLAMP ALIGNMENT SCREEN PREPARATION
Prepare an alignment screen as illustrated.
(1) Position the vehicle on a level surface perpen-
dicular to a flat wall 7.62 meters (25 feet) away from
Fig. 41 Headlamp Unit - North America
1 - MOUNTING TAB (2)
2 - ADJUSTING SCREW
3 - LOCK RING
4 - HOUSING
5 - LOCATOR TAB
6 - SOCKET & BULB
Fig. 42 Headlamp Unit - Rest-Of-World
1 - LEVELING MOTOR (IF EQUIPPED)
2 - BOOT SEAL
3 - ADJUSTING SCREW
4 - LOCATOR TAB
5 - HOUSING
6 - FRONT POSITION LAMP SOCKET & BULB
7 - HEADLAMP BULB
8 - MOUNTING TAB (2)
8L - 42 LAMPS/LIGHTING - EXTERIORKJ
HEADLAMP UNIT (Continued)

(5) From the front of the vehicle, pull the front fog
lamp unit out of the front bumper fascia far enough
to access and disconnect the wire harness connector
for the front fog lamp unit from the lamp socket con-
nector receptacle (Fig. 15).
(6) Remove the front fog lamp unit from the front
bumper fascia.
INSTALLATION
(1) Position the front fog lamp unit to the front
bumper fascia.
(2) Reconnect the wire harness connector for the
front fog lamp to the lamp socket connector recepta-
cle (Fig. 15).
(3) Position the front fog lamp unit into the front
bumper fascia.
(4) Reach into the front wheel opening and
through the access hole to install and tighten the
three screws that secure the front fog lamp unit
housing to the front bumper fascia (Fig. 14). Tighten
the screws to 3 N´m (25 in. lbs.).
(5) Lower and snap shut the cover over the access
hole at the front of the front wheelhouse splash
shield.
(6) Reconnect the battery negative cable.
(7) Confirm proper front fog lamp unit alignment.
(Refer to 8 - ELECTRICAL/LAMPS/LIGHTING -
EXTERIOR/FRONT FOG LAMP UNIT - ADJUST-
MENTS).
ADJUSTMENTS
ADJUSTMENT - FRONT FOG LAMP UNIT
VEHICLE PREPARATION FOR FOG LAMP ALIGNMENT
(1) Repair or replace any faulty or damaged com-
ponents that could hinder proper lamp alignment.
(2) Verify proper tire inflation.
(3) Clean the front fog lamp lenses.
(4) Verify that the cargo area is not heavily loaded.
(5) The fuel tank should be Full. Add 2.94 kilo-
grams (6.5 pounds) of weight over the fuel tank for
each estimated gallon of missing fuel.
FOG LAMP ALIGNMENT
Prepare an alignment screen as illustrated. A prop-
erly aligned front fog lamp will project a pattern on
the alignment screen 100 millimeters (4 inches)
below the fog lamp centerline and straight ahead of
the lamp.
(1) Position the vehicle on a level surface perpen-
dicular to a flat wall 7.62 meters (25 feet) away from
the front of the front fog lamp lens (Fig. 16). If nec-
essary, tape a line on the floor 7.62 meters (25 feet)
away from and parallel to the wall.
(2) Measure up on the wall 1.27 meters (5 feet)
from the floor and tape a vertical line on the align-
ment screen at the centerline of the vehicle. Sight
along the centerline of the vehicle (from the rear of
the vehicle forward) to verify the accuracy of the cen-
terline placement.
Fig. 14 Front Fog Lamp Unit Remove/Install
1 - FRONT FOG LAMP UNIT
2 - SCREW (3)
3 - FRONT WHEELHOUSE SPLASH SHIELD
4 - FRONT BUMPER FASCIA
5 - ACCESS HOLE
Fig. 15 Front Fog Lamp Unit
1 - ADJUSTING SCREW
2 - MOUNTING BRACKET
3 - HOUSING
4 - SOCKET & BULB
5 - LENS
KJLAMPS8Ls-25
FRONT FOG LAMP UNIT (Continued)

(4) Pull the inboard side of the headlamp unit
away from the grille opening reinforcement far
enough to disengage the locator tab on the outboard
side of the unit (Fig. 41) or (Fig. 42) from the engage-
ment slot in the outboard edge of the reinforcement.(5) Pull the headlamp unit away from the grille
opening reinforcement far enough to disconnect the
wire harness connectors from the headlamp bulb
socket (North America), the headlamp bulb base
(Rest-Of-World), the front position lamp socket (if
equipped), and the headlamp leveling motor (if
equipped).
(6) Remove the headlamp unit from the grille
opening reinforcement.
INSTALLATION
(1) Position the headlamp unit to the grille open-
ing reinforcement.
(2) Reconnect the wire harness connectors to the
headlamp bulb socket (North America), the headlamp
bulb base (Rest-Of-World), the front position lamp
socket (if equipped), and the headlamp leveling motor
(if equipped) (Fig. 41) or (Fig. 42).
(3) Engage the locator tab on the outboard side of
the headlamp unit into the engagement slot in the
outboard edge of the grille opening reinforcement.
(4) Align the two mounting tabs on the inboard
side of the headlamp unit housing to the mounting
holes in the grille opening reinforcement (Fig. 40).
(5) Install and tighten the two screws that secure
the mounting tabs on the inboard side of the head-
lamp unit housing to the grille opening reinforce-
ment. Tighten the screws to 3 N´m (30 in. lbs.).
(6) Reinstall the grille panel onto the grille open-
ing reinforcement. (Refer to 23 - BODY/EXTERIOR/
GRILLE - INSTALLATION).
(7) Reconnect the battery negative cable.
(8) Confirm proper headlamp unit alignment.
(Refer to 8 - ELECTRICAL/LAMPS/LIGHTING -
EXTERIOR/HEADLAMP UNIT - ADJUSTMENTS).
ADJUSTMENTS
ADJUSTMENT - HEADLAMP UNIT
VEHICLE PREPARATION FOR HEADLAMP ALIGNMENT
(1) Verify headlamp dimmer (multi-function)
switch and high beam indicator operation.
(2) If the vehicle is equipped with headlamp level-
ing, be certain that the headlamp leveling switch is
in the ª0º position.
(3) Repair or replace any faulty or damaged com-
ponents that could hinder proper lamp alignment.
(4) Verify proper tire inflation.
(5) Clean headlamp lenses.
(6) Verify that cargo area is not heavily loaded.
(7) The fuel tank should be Full. Add 2.94 kilo-
grams (6.5 pounds) of weight over the fuel tank for
each estimated gallon of missing fuel.
Fig. 41 Headlamp Unit - North America
1 - MOUNTING TAB (2)
2 - ADJUSTING SCREW
3 - LOCK RING
4 - HOUSING
5 - LOCATOR TAB
6 - SOCKET & BULB
Fig. 42 Headlamp Unit - Rest-Of-World
1 - LEVELING MOTOR (IF EQUIPPED)
2 - BOOT SEAL
3 - ADJUSTING SCREW
4 - LOCATOR TAB
5 - HOUSING
6 - FRONT POSITION LAMP SOCKET & BULB
7 - HEADLAMP BULB
8 - MOUNTING TAB (2)
8Ls - 42 LAMPSKJ
HEADLAMP UNIT (Continued)

DESCRIPTION SPECIFICATION
PISTONS
Material Aluminum Alloy
Diameter 92.975 mm (3.6605 in.)
Weight 367.5 grams (12.96 oz)
Ring Groove Diameter
No. 1 83.73 - 83.97 mm
(3.296 - 3.269 in.)
No. 2 82.833 - 83.033 mm
(3.261 - 3.310 in.)
No. 3 83.88 - 84.08 mm
(3.302 - 3.310 in.)
PISTON PINS
Type Floating
Clearance In Piston 0.010 - 0.019 mm
(0.0004 - 0.0008 in.)
Diameter 24.013 - 24.016 mm
(0.9454 - 0.9456 in.)
PISTON RINGS
Ring Gap
Top Compression Ring 0.37 - 0.63 mm
(0.0146 - 0.0249 in.)
Second Compression
Ring0.37 - 0.63 mm
(0.0146 - 0.0249 in.)
Oil Control (Steel Rails) 0.25 - 0.76 mm
(0.0099 - 0.30 in.)
Side Clearance
Top Compression Ring .051 - .094 mm
(0.0020 - 0.0037 in.)
Second Compression
Ring0.040 - 0.080 mm
(0.0016 - 0.0031 in.)
Oil Ring (Steel Ring) .019 - .229 mm
(.0007 - .0091 in.)
Ring Width
Top Compression Ring 1.472 - 1.490 mm
(0.057 - 0.058 in.)
Second Compression
Ring1.472 - 1.490 mm
(0.057 - 0.058 in.)
Oil Ring (Steel Rails) 0.445 - 0.470 mm
(0.017 - 0.018 in.)DESCRIPTION SPECIFICATION
CONNECTING RODS
Bearing Clearance 0.010 - 0.048 mm
(0.0004 - 0.0019 in.)
Side Clearance 0.10 - 0.35 mm
(0.004 - 0.0138 in.)
Piston Pin Clearance .015 - .028 mm
(0.0006 - 0.0011 in.)
Bearing Bore Out of
Round0.004 mm
(MAX) (0.0002 in.)
Total Weight (Less
Bearing)612 grams (21.588
ounces)
CRANKSHAFT
Main BearingJournal
Diameter 63.488 - 63.512 mm
(2.4996 - 2.5005 in.)
Bearing Clearance 0.002 - 0.034 mm
Out of Round (MAX) 0.005 mm (0.0002 in.)
Taper (MAX) 0.006 mm (0.0004 in.)
End Play 0.052 - 0.282 mm
(0.0021 - 0.0112 in.)
End Play (MAX) 0.282 mm (0.0112 in)
Connecting Rod
Journal
Diameter 57.904 - 57.896 mm
Bearing Clearance 0.010 - 0.048 mm
Out of Round (MAX) 0.005 mm (0.0002 in.)
Taper (MAX) 0.006 mm (0.0002 in.)
CAMSHAFT
Bore Diameter 26.02 - 26.04 mm
(1.0245 - 1.0252 in.)
Bearing Journal Diameter 25.975 - 25.995 mm
(1.0227 - 1.0235 in.)
Bearing Clearance 0.025 - 0.065 mm
(0.001 - 0.0026 in.)
Bearing Clearance (MAX) 0.065 mm (0.0026 in.)
End Play .075 - .200 mm
(0.003 - 0.0079 in.)
End Play (MAX) .200 mm (0.0079 in.)
KJENGINE - 3.7L 9 - 13
ENGINE - 3.7L (Continued)

Bearing
MarkSIZE USED WITH
JOURNAL SIZE
.025 US.025 mm 50.983-50.967 mm
(.001 in.) (2.0073-2.0066 in.)
Std.STANDARD 50.992-51.008 mm
(2.0076-2.0082 in.)
.250 US.250 mm 50.758-50.742 mm
(.010 in.) (1.9984-1.9978 in.)
(9) Repeat the Plastigage measurement to verify
your bearing selection prior to final assembly.
(10) Once you have selected the proper insert,
install the insert and cap. Tighten the connecting rod
bolts to 27 N´m (20 ft. lbs.) plus a 90É turn.
Slide snug-fitting feeler gauge between the con-
necting rod and crankshaft journal flange (Fig. 39).
Refer to Engine Specifications for the proper clear-
ance. Replace the connecting rod if the side clearance
is not within specification.
CRANKSHAFT
DESCRIPTION
The crankshaft (Fig. 40) is constructed of nodular
cast iron. The crankshaft is a three throw split pin
design with six counterweights for balancing pur-
poses. The crankshaft is supported by four select fit
main bearings with the number two serving as the
thrust washer location. The main journals of the
crankshaft are cross drilled to improve rod bearinglubrication. The number six counterweight has provi-
sions for crankshaft position sensor target wheel
mounting. The select fit main bearing markings are
located on the rear side of the target wheel. The
crankshaft oil seals are one piece design. The front
oil seal is retained in the timing chain cover, and the
rear seal is pressed in to a bore formed by the cylin-
der block and the bedplate assembly.
Fig. 38 Measuring Bearing Clearance with
Plastigage
1 - PLASTIGAGE SCALE
2 - COMPRESSED PLASTIGAGE
Fig. 39 Checking Connecting Rod Side Clearance -
Typical
Fig. 40 CRANKSHAFT AND TARGET RING
1 - CRANKSHAFT
2 - CRANKSHAFT POSITION SENSOR TARGET RING
9 - 42 ENGINE - 3.7LKJ
CONNECTING ROD BEARINGS (Continued)

CRANKSHAFT MAIN
BEARINGS
STANDARD PROCEDURE
MAIN BEARING - FITTING
SELECT FIT IDENTIFICATION
The main bearings are ªselect fitº to achieve proper
oil clearances. For main bearing selection, the crank-
shaft position sensor target wheel has grade identifi-
cation marks stamped into it (Fig. 44). These marks
are read from left to right, corresponding with jour-
nal number 1, 2, 3, 4 and 5. The crankshaft position
sensor target wheel is mounted to the number 8
counter weight on the crankshaft.
INSPECTION
Wipe the inserts clean and inspect for abnormal
wear patterns and for metal or other foreign material
imbedded in the lining. Normal main bearing insert
wear patterns are illustrated.
Inspect the back of the inserts for fractures, scrap-
ings or irregular wear patterns.
Inspect the upper insert locking tabs for damage.Replace all damaged or worn bearing inserts.
Fig. 43 BEDPLATE TIGHTENING SEQUENCE
Fig. 44 Main Bearing Markings on Target Wheel
-Typical
1 - REARMOST CRANKSHAFT COUNTER WEIGHT
2 - TARGET WHEEL
3 - MAIN BEARING SELECT FIT MARKINGS
KJENGINE - 3.7L 9 - 45
CRANKSHAFT (Continued)