Jeep 1997 Grand Cherokee Service Manual page 240

7 - 12 COOLING SYSTEM
DIAGNOSIS AND TESTING (Continued)
SERPENTINE DRIVE BELT DIAGNOSIS-5.2/5.9L 8-CYLINDER ENGINES
CONDITION
RIB CHUNKING (ONE OR MORE
RIBS HAS SEPARATED FROM
BELT BODY)
RIB OR BELT WEAR
LONGITUDINAL BELT CRACKING
(CRACKS BETWEEN TWO RIBS)
BELT SLIPS
"GROOVE JUMPING" (BELT
DOES NOT MAINTAIN CORRECT
POSITION ON PULLEY)
BELT BROKEN (NOTE: IDENTIFY
AND CORRECT PROBLEM
BEFORE NEW BELT IS
INSTALLED)
NOISE (OBJECTIONAL SQUEAL,
SQUEAK, OR RUMBLE IS
HEARD OR FELT WHILE DRIVE
BELT IS IN OPERATION)
POSSIBLE CAUSES
1. Foreign objects imbedded in pulley
grooves.
2. Installation damage.
1. Pulley(s) misaligned.
2. Abrasive environment.
3. Rusted pulley(s).
4. Sharp or jagged pulley groove tips.
5. Rubber deteriorated.
1. Belt has mistracked from pulley
groove.
2. Pulley groove tip has worn away
rubber to tensile member.
1. Belt slipping because of insufficient
tension.
2. Incorrect belt.
3. Belt or pulley subjected to
substance (belt dressing, oil ethylene
glycol) that has reduced friction.
4. Driven component bearing failure.
5. Belt glazed and hardened from heat
and excessive slippage.
1. Belt tension either too high or too
low.
2. Incorrect belt.
3. Pulley(s) not within design
tolerance.
4. Foreign object(s) in grooves.
5. Pulley misalignment.
6. Belt cordline is broken.
1. Excessive tension.
2. Incorect belt.
3. Tensile member damaged during
belt instalation.
4. Severe misalignment.
5. Bracket, pulley, or bearing failure.
1. Belt slippage.
2. Bearing noise.
3. Belt misalignment.
4. Belt-to-pulley mismatch.
CORRECTION
1. Remove foreign objects from
pulley grooves. Replace belt.
2. Replace belt.
1. Align pulley(s).
2. Clean pulley(s). Replace belt if
necessary.
3. Clean rust from pulley(s).
4. Replace pulley.
5. Replace belt.
1. Repace belt.
2. Replace belt.
1. Replace automatic belt
tensioner.
2. Replace belt.
3. Replace belt and clean pulleys.
4. replace faulty component
bearing.
5. Replace belt.
1. Replace automatic belt
tensioner.
2. Replace belt.
3. Replace pulley(s).
4. Remove foreign objectsfrom
grooves.
5. Check and replace.
6. Replace belt.
1. Replace belt and automatic belt
tensioner.
2. Replace belt.
3. Replace belt.
4. Check and replace.
5. Replace defective component
and belt.
1. Replace belt or automatic belt
tensioner.
2. Locate and repair.
3. Replace belt.
4. Install correct belt.
ZG