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Jeep Liberty KJ. Manual - part 1388

CONDITION

POSSIBLE CAUSES

CORRECTION

LONGITUDAL BELT CRACKING.

1. Belt has mistracked from pulley
groove.

1. Replace belt.

2. Pulley groove tip has worn away
rubber to tensile member.

2. Replace belt.

GROOVE JUMPING

(Belt does not maintain correct
position on pulley).

1. Incorrect belt tension.

1. Inspect/Replace tensioner if
necessary.

2. Pulley(s) not within design
tolerance.

2. Replace pulley(s).

3. Foreign object(s) in grooves.

3. Remove foreign objects from
grooves.

4. Pulley misalignment.

4. Align component.

5. Belt cordline is broken.

5. Replace belt.

BELT BROKEN
(Note: Identify and correct problem
before new belt is installed).

1. Incorrect belt tension.

1. Replace Inspect/Replace
tensioner if necessary.

2. Tensile member damaged during
belt installation.

2. Replace belt.

3. Severe misalignment.

3. Align pulley(s).

4. Bracket, pulley, or bearing failure.

4. Replace defective component
and belt.

NOISE
(Objectionable squeal, squeak, or
rumble is heard or felt while drive
belt is in operation).

1. Incorrect belt tension.

1. Inspect/Replace tensioner if
necessary.

2. Bearing noise.

2. Locate and repair.

3. Belt misalignment.

3. Align belt/pulley(s).

4. Belt to pulley mismatch.

4. Install correct belt.

5. Driven component induced
vibration.

5. Locate defective driven
component and repair.

TENSION SHEETING FABRIC
FAILURE
(Woven fabric on outside
circumference of belt has cracked or
separated from body of belt).

1. Tension sheeting contacting
stationary object.

1. Correct rubbing condition.

2. Excessive heat causing woven
fabric to age.

2. Replace belt.

3. Tension sheeting splice has
fractured.

3. Replace belt.

CORD EDGE FAILURE
(Tensile member exposed at edges
of belt or separated from belt body).

1. Incorrect belt tension.

1. Inspect/Replace tensioner if
necessary.

2. Belt contacting stationary object.

2. Replace belt.

3. Pulley(s) out of tolerance.

3. Replace pulley.

4. Insufficient adhesion between
tensile member and rubber matrix.

4. Replace belt.

Noises generated by the accessory drive belt are most noticeable at idle. Before replacing a belt to resolve a noise
condition, inspect all of the accessory drive pulleys for alignment, glazing, or excessive end play.

7 - 30

ACCESSORY DRIVE

REMOVAL

3.7L ENGINE

NOTE: The belt routing schematics are published
from the latest information available at the time of
publication. If anything differs between these
schematics and the Belt Routing Label, use the
schematics on Belt Routing Label. This label is
located in the engine compartment.

CAUTION: DO NOT LET TENSIONER ARM SNAP
BACK TO THE FREEARM POSITION, SEVERE
DAMAGE MAY OCCUR TO THE TENSIONER.

Belt tension is not adjustable. Belt adjustment is main-
tained by an automatic spring loaded belt tensioner.

1. Disconnect negative battery cable from battery.

2. Rotate belt tensioner (6) until it contacts its stop.

Remove belt, then slowly rotate the tensioner into
the freearm position.

2.8L DIESEL

CAUTION: DO NOT LET TENSIONER ARM SNAP
BACK TO THE FREEARM POSITION, SEVERE
DAMAGE MAY OCCUR TO THE TENSIONER.

Belt tension is not adjustable. Belt adjustment is main-
tained by an automatic (spring loaded) belt tensioner.

1. Disconnect negative battery cable.

2. Rotate belt tensioner until it contacts its stop.

Remove belt (9), then slowly rotate the tensioner
into the freearm position.

ACCESSORY DRIVE

7 - 31

INSTALLATION

3.7L ENGINE

Belt tension is not adjustable. Belt adjustment is main-
tained by an automatic spring loaded belt tensioner.

1. Check condition of all pulleys.

CAUTION: When installing the serpentine acces-
sory drive belt, the belt MUST be routed correctly.
If not, the engine may overheat due to the water
pump rotating in the wrong direction.

2. Install new belt. Route the belt around all pulleys except the idler pulley. Rotate the tensioner arm (1) until it

contacts its stop position. Route the belt around the idler and slowly let the tensioner rotate into the belt. Make
sure the belt is seated onto all pulleys.

3. With the drive belt installed, inspect the belt wear indicator. On 3.7L Engines the gap between the tang and the

housing stop (measurement A) must not exceed 24 mm (0.94 inches).

2.8L DIESEL

Belt tension is not adjustable. Belt adjustment is main-
tained by an automatic spring loaded belt tensioner.

1. Check condition of all pulleys.

CAUTION: When installing the serpentine acces-
sory drive belt, the belt MUST be routed correctly.
If not, the engine may overheat due to the water
pump rotating in the wrong direction.

2. Install new belt (9). Route the belt around all pul-

leys except the idler pulley. Rotate the tensioner
arm until it contacts its stop position. Route the belt
around the idler and slowly let the tensioner rotate
into the belt. Make sure the belt is seated onto all
pulleys.

7 - 32

ACCESSORY DRIVE

IDLER PULLEY

REMOVAL

CAUTION: The retaining bolts on the idler pulleys
are left hand thread.

1. Disconnect negative battery cable.

2. Remove accessory drive belt (Refer to 7 - COOL-

ING/ACCESSORY

DRIVE/DRIVE

BELTS

REMOVAL).

3. Remove idler pulley (1) retaining bolts and pulleys.

INSTALLATION

2.8L DIESEL

1. Install idler pulleys and retaining bolts. Torque bolts to 53 N·m.

2. Install accessory drive belt (Refer to 7 - COOLING/ACCESSORY DRIVE/DRIVE BELTS - INSTALLATION).

3. Connect negative battery cable.

ACCESSORY DRIVE

7 - 33

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