Jeep Liberty KJ. Manual — part 1386
SPECIAL TOOLS
COOLING
PLIERS 6094
RELEASE TOOL 8875A
ADAPTER PINS 8346
SPANNER WRENCH 6958 WITH 8346 ADAPTOR
PINS
PRESSURE TESTER 7700A
COOLANT REFRACTOMETER 8286
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COOLING
KJ
ACCESSORY DRIVE
TABLE OF CONTENTS
page
page
ACCESSORY DRIVE
DIAGNOSIS AND TESTING - SERPENTINE
DRIVE BELT DIAGNOSIS . . . . . . . . . . . . . . . . . . . . 24
BELT TENSIONERS
DRIVE BELTS
DIAGNOSIS AND TESTING - ACCESSORY
DRIVE BELT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
IDLER PULLEY
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
INSTALLATION
2.8L DIESEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
KJ
ACCESSORY DRIVE
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ACCESSORY DRIVE
DIAGNOSIS AND TESTING - SERPENTINE DRIVE BELT DIAGNOSIS
When diagnosing serpentine drive belts, small cracks
(1) that run across ribbed surface of belt from rib to
rib, are considered normal. These are not a reason to
replace belt. However, cracks running along a rib (not
across) are not normal. Any belt with cracks running
along a rib must be replaced. Also replace belt if it has
excessive wear, frayed cords or severe glazing.
SERPENTINE DRIVE BELT DIAGNOSIS CHART
CONDITION
POSSIBLE CAUSES
CORRECTION
RIB CHUNKING (ONE OR MORE
RIBS HAS SEPARATED FROM
BELT BODY)
1. Foreign objects imbedded in pulley
grooves.
1. Remove foreign objects from
pulley grooves. Replace belt.
2. Installation damage.
2. Replace belt.
RIB OR BELT WEAR
1. Pulley(s) misaligned.
1. Align pulley(s).
2. Abrasive environment.
2. Clean pulley(s). Replace belt if
necessary.
3. Rusted pulley(s).
3. Clean rust from pulley(s).
4. Sharp or jagged pulley groove tips.
4. Replace pulley.
5. Rubber deteriorated.
5. Replace belt.
LONGITUDINAL BELT CRACKING
(CRACKS BETWEEN TWO RIBS)
1. Belt has mistracked from pulley
groove.
1. Replace belt.
2. Pulley groove tip has worn away
rubber to tensile member.
2. Replace belt.
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ACCESSORY DRIVE
KJ
CONDITION
POSSIBLE CAUSES
CORRECTION
BELT SLIPS
1. Belt slipping because of insufficient
tension.
1. Replace automatic belt tensioner.
2. Belt routed incorrectly.
2. Verify belt routing.
3. Incorrect belt.
3. Replace belt.
4. Belt or pulley subjected to
substance (belt dressing, oil ethylene
glycol) that has reduced friction.
4. Replace belt and clean pulleys.
5. Driven component bearing failure.
5. Replace faulty component
bearing.
6. Belt glazed and hardened from
heat and excessive slippage.
6. Replace belt.
“GROOVE JUMPING
9
(BELT
DOES NOT MAINTAIN CORRECT
POSITION ON PULLEY)
1. Belt tension either too high or too
low.
1. Replace automatic belt tensioner.
2. Belt routed incorrectly.
2. Verify belt routing.
3. Incorrect belt.
3. Replace belt.
4. Pulley(s) not within design
tolerance.
4. Replace pulley(s).
5. Foreign object(s) in grooves.
5. Remove foreign objects from
grooves.
6. Pulley misalignment.
6. Check and replace.
7. Belt cord line is broken.
7. Replace belt.
BELT BROKEN (NOTE: IDENTIFY
AND CORRECT PROBLEM
BEFORE NEW BELT IS
INSTALLED)
1. Excessive tension.
1. Replace belt and automatic belt
tensioner.
2. Incorrect belt.
2. Replace belt.
3. Tensile member damaged during
belt installation.
3. Replace belt.
4. Severe misalignment.
4. Check and replace.
5. Bracket, pulley, or bearing failure.
5. Replace defective component
and belt.
NOISE (OBJECTIONABLE
SQUEAL, SQUEAK, OR RUMBLE
IS HEARD OR FELT WHILE
DRIVE BELT IS IN OPERATION)
1. Belt slippage.
1. Replace belt or automatic belt
tensioner.
2. Bearing noise.
2. Locate and repair.
3. Belt misalignment.
3. Replace belt.
4. Belt-to-pulley mismatch.
4. Install correct belt.
Refer to SERPENTINE DRIVE BELT DIAGNOSIS CHART for further belt diagnosis.
KJ
ACCESSORY DRIVE
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