Dodge Dakota (ND). Manual - part 127

NOISE DIAGNOSIS

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.

ACCESSORY 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 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. Inspect belt.

5. Belt rubber deteriorated

5. Replace belt

BELT SLIPS

1. Belt slipping because of
insufficient tension

1. Inspect/Replace tensioner if
necessary

2. Belt or pulley exposed to
substance that has reduced friction
(belt dressing, oil, ethylene glycol)

2. Replace belt and clean pulleys

3. Driven component bearing failure
(seizure)

3. Replace faulty component or
bearing

4. Belt glazed or hardened from
heat and excessive slippage

4. Replace belt.

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

7 - 20

ACCESSORY DRIVE

CONDITION

POSSIBLE CAUSES

CORRECTION

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

REMOVAL - 3.7L/4.7L

CAUTION: DO NOT LET TENSIONER ARM SNAP
BACK TO THE FREEARM POSITION, SEVER DAM-
AGE MAY OCCUR TO THE TENSIONER.

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

1. Disconnect negative battery cable from battery.

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

Remove belt (2), then slowly rotate the tensioner
(6) into the freearm position.

ACCESSORY DRIVE

7 - 21

INSTALLATION - 3.7L/4.7L

Belt tension is not adjustable. Belt adjustment is main-
tained by an automatic ( spring load ) 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 (5). Rotate the tensioner arm
until it contacts it’s stop position. Route the belt
around the idler (5) 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 4.7L Engines only, the gap between
the tang and the housing stop (measurement A)
must not exceed 24 mm (.94 inches). If the mea-
surement exceeds this specification replace the
serpentine accessory drive belt.

7 - 22

ACCESSORY DRIVE

ENGINE

TABLE OF CONTENTS

page

CONTAINER-COOLANT RECOVERY

DESCRIPTION

. . . . . . . . . . . . . . . . . . . . . . . . . 24

OPERATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . 24

REMOVAL

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24