Chrysler Pacifica. Manual — part 464
NOTE: Deaeration does not occur at engine idle—
higher engine speeds are required. Normal driving
will deaerate cooling system.
STANDARD PROCEDURE
STANDARD PROCEDURE - COOLING SYSTEM
DRAINING
WARNING: DO NOT REMOVE OR LOOSEN THE
COOLANT
PRESSURE
CAP,
CYLINDER
BLOCK
DRAIN PLUGS, OR THE DRAINCOCK WHEN THE
SYSTEM
IS
HOT
AND
UNDER
PRESSURE
BECAUSE SERIOUS BURNS FROM THE COOLANT
CAN OCCUR.
(1) Without removing pressure cap and with
system not under pressure, open the draincock.
The draincock is located on the lower left side of
radiator (Fig. 3).
(2) After the coolant pressure container is empty,
then remove coolant pressure cap.
(3) Remove the cylinder block drain plug(s).
STANDARD PROCEDURE - COOLING SYSTEM
FILLING
Remove pressure cap and fill system, using a 50/50
mix of Mopar
t Antifreeze/Coolant, 5 Year/100,000
Mile Formula and distilled water.
Continue filling system until full. Be careful not
to spill coolant on drive belts or the generator.
For cooling system capacity, (Refer to LUBRICATION
& MAINTENANCE/FLUID TYPES - SPECIFICA-
TIONS).
Fill coolant pressure container to at least the MAX
mark with 50/50 solution. It may be necessary to add
coolant to the coolant pressure container after three
or four warm up/cool down cycles to maintain coolant
level between the MAX and MIN mark. This will
allow trapped air to be removed from the system.
STANDARD PROCEDURE - ADDING
ADDITIONAL COOLANT
The radiator cap should not be removed.
When additional coolant is needed to maintain this
level, it should be added to the coolant recovery/re-
serve container. Use only 50/50 mix of ethylene glycol
type antifreeze and distilled water. For the recom-
meded antifreeze/coolant type (Refer to LUBRICA-
TION
&
MAINTENANCE/FLUID
TYPES
-
SPECIFICATIONS).
CAUTION: Do not use well water, or suspect water
supply in cooling system. A 50/50 ethylene glycol
and distilled water mix is recommended. For the
recommeded
antifreeze/coolant
type
(Refer
to
LUBRICATION & MAINTENANCE/FLUID TYPES -
DESCRIPTION).
STANDARD PROCEDURE - COOLANT LEVEL
CHECK
NOTE: Do not remove pressure cap for routine
coolant level inspections.
The coolant reserve system provides a quick visual
method for determining the coolant level without
removing the radiator cap. With the engine cold
and not running, simply observe the level of the
coolant in the coolant pressure container. The coolant
level should be between the MIN and MAX marks.
Fig. 3 Draincock Location
1 - LEFT SIDE FRAME RAIL
2 - DRAINCOCK
CS
COOLING
7 - 3
COOLING (Continued)
SPECIFICATIONS
TORQUE
DESCRIPTION
N·m
Ft.
Lbs.
In.
Lbs.
Accessory Drive Belt Tensioner
Assembly —Bolt
28
—
250
Engine Coolant Temperature
Sensor
7
—
60
Generator & A/C Compressor Drive
Belt Tensioner Assembly —Bolt
54
40
—
Coolant Outlet Connector/
Thermostat Housing—Bolts
28
—
250
Water Pump
12
—
105
Water Pump Inlet Tube —Bolts
12
—
105
Water Pump Inlet Tube —Bolts
28
—
250
Water Pump Pulley —Bolts
28
—
250
Radiator to A/C Condenser—
Screws
5
—
45
Radiator Fan—Screws
5
—
45
Radiator Mounting (Upper
Bracket)—Nuts
12
—
105
SPECIAL TOOLS
COOLING SYSTEM
Pliers 6094
Hose Clamp Pliers 8495
Cooling System Tester 7700
Coolant Refractometer 8286
7 - 4
COOLING
CS
COOLING (Continued)
ACCESSORY DRIVE
TABLE OF CONTENTS
page
page
BELT TENSIONERS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
. . . . . . . . . . . . . . . . . . . . . . . . . . 5
DRIVE BELTS
DIAGNOSIS AND TESTING - ACCESSORY
. . . . . . . . . . . . . . . . . . . . . . . . . . 6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
. . . . . . . . . . . . . . . . . . . . . . . . . . . 6
. . . . . . . . . . . . . . . . . . . . . . . . . . 7
IDLER PULLEY
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
. . . . . . . . . . . . . . . . . . . . . . . . . . 8
BELT TENSIONERS
REMOVAL
(1) Raise vehicle on hoist.
(2) Remove the drive belt shield.
(3) Remove the drive belt (Refer to 7 - COOLING/
ACCESSORY DRIVE/DRIVE BELTS - REMOVAL).
(4) Remove the belt tensioner (Fig. 1).
INSTALLATION
(1) Install the belt tensioner and bolt. Tighten bolt
to 28 N·m (250 in. lbs.).
(2) Install the drive belt (Refer to 7 - COOLING/
ACCESSORY DRIVE/DRIVE BELTS - INSTALLA-
TION).
(3) Install the drive belt shield.
(4) Lower the vehicle.
Fig. 1 BELT TENSIONER
1 - BELT TENSIONER
2 - BOLT
CS
ACCESSORY DRIVE
7 - 5
DRIVE BELTS
DIAGNOSIS AND TESTING - ACCESSORY
DRIVE BELT
CONDITION
POSSIBLE CAUSES
CORRECTIONS
INSUFFICIENT ACCESSORY
OUTPUT DUE TO BELT SLIPPAGE
1. Belt too loose
1. Replace belt
2. Belt excessively glazed or worn
2. Replace and tighten as specified
BELT SQUEAL WHEN
ACCELERATING ENGINE
1. Belts too loose
1. Replace tensioner
2. Belt glazed
2. Replace belts
BELT SQUEAK AT IDLE
1. Belts too loose
1. Replace tensioner
2. Dirt or paint imbedded in belt
2. Replace belt
3. Non-uniform belt
3. Replace belt
4. Misaligned pulleys
4. Align accessories
5. Non-uniform groove or eccentric
pulley
5. Replace pulley
BELT ROLLED OVER IN GROOVE
OR BELT JUMPS OFF
1. Broken cord in belt
1. Replace belt
2. Belt too loose, or too tight
2. Replace tensioner
3. Misaligned pulleys
3. Align accessories
4. Non-uniform groove or eccentric
pulley
4. Replace pulley
REMOVAL
(1) Raise vehicle on hoist.
(2) Remove the drive belt shield (Fig. 2).
WARNING: DO NOT ALLOW DRIVE BELT TEN-
SIONER TO SNAP BACK, AS DAMAGE TO TEN-
SIONER
AND/OR
PERSONAL
INJURY
COULD
RESULT.
(3) Position a wrench on the belt tensioner lug
(Fig. 3).
(4) Release belt tension by rotating the tensioner
counterclockwise (Fig. 3).
(5) Remove the drive belt.
(6) Carefully return tensioner to its relaxed posi-
tion.
CLEANING
Clean all foreign debris from belt pulley grooves.
The belt pulleys must be free of oil, grease, and cool-
ants before installing the drive belt.
INSPECTION
Belt replacement under any or all of the following
conditions is required:
• Excessive wear
• Frayed cords
• Severe glazing
Fig. 2 Accessory Drive Belt Splash Shield
1 - ATTACHING SCREW
2 - ATTACHING SCREWS
3 - SPLASH SHIELD
7 - 6
ACCESSORY DRIVE
CS
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