Content .. 898 899 900 901 ..

Chrysler Pacifica. Manual - part 900

NOTE: Replacement of the heater inlet tube will be
required if the hose ends are cut for removal.

(4) If necessary, carefully cut the hose end and

peel the hose off of the tube.

(5) Remove the two heater inlet tube retaining

bolts and remove the inlet tube.

INSTALLATION

(1) Position the heater inlet tube into the engine

compartment and install the two heater inlet tube
retaining bolts. Tighten the bolts to 10 N·m (89 in.
lbs.).

(2) Using spring tension clamp pliers, compress

and slide each clamp away from the end of the hose
being installed.

CAUTION:
DO NOT apply excessive pressure on heater tubes
or connections when install the heater inlet hose.
Excessive pressure may damage or deform the
heater tubes or connections, causing an engine
coolant leak.

(3) Install each hose by carefully twisting the hose

back and forth while gently pushing it onto the tube
end.

(4) Using spring tension clamp pliers, compress

and slide the clamps onto each end of the hose being
installed.

(5) Refill the engine cooling system (Refer to 7 -

COOLING - STANDARD PROCEDURE - COOLING
SYSTEM REFILL).

HEATER RETURN HOSE

REMOVAL

WARNING: Refer to the applicable warnings and
cautions for this system before performing the fol-
lowing operation (Refer to 24 - HEATING & AIR

CONDITIONING/PLUMBING - WARNINGS) and (Refer
to 24 - HEATING & AIR CONDITIONING/PLUMBING -
CAUTIONS). Failure to follow the warnings and cau-
tions could result in possible personal injury or
death.

NOTE: The heater return tube is constructed from
formed steel tubing and rubber hoses. Depending
on application, the ends are secured to the heater
core, engine oil cooler or the engine by spring ten-
sion clamps.

(1) Drain the engine cooling system (Refer to 7 -

COOLING - STANDARD PROCEDURE - COOLING
SYSTEM DRAIN).

(2) Using spring tension clamp pliers, compress

and slide the clamps off of each end of the heater
return hose. (Fig. 22).

CAUTION: DO NOT apply excessive pressure on
heater tubes or connections when removing heater
hoses. Excessive pressure may damage or deform
the tubes/heater core, causing an engine coolant
leak.

(3) Disconnect each hose end by carefully twisting

the hose back and forth on the tube, while gently
pulling it away from the end of the tube.

NOTE: Replacement of the heater return hose will
be required if the hose ends are cut for removal.

(4) If necessary, carefully cut the hose end and

peel the hose off of the tube.

INSTALLATION

(1) Using spring tension clamp pliers, compress

and slide the clamp away from the end of the heater
return hose.

Fig. 21 Heater Inlet Tube

1 - SPRING CLAMP (2)
2 - HEATER CORE INLET TUBE
3 - CABLE BRACKET
4 - BOLT
5 - COOLANT RESERVOIR HOSE
6 - MOTOR MOUNT
7 - BOLT
8 - HEATER INLET TUBE

Fig. 22 Heater Return Hose

1 - HEATER RETURN HOSE
2 - HEATER CORE OUTLET TUBE
3 - SPRING CLAMP (2)
4 - INTAKE MANIFOLD TUBE

PLUMBING

24 - 77

HEATER INLET HOSE (Continued)

CAUTION:
DO NOT apply excessive pressure on heater tubes
or connections when install the heater return hose.
Excessive pressure may damage or deform the
heater tubes or connections, causing an engine
coolant leak.

(2) Install each hose end by carefully twisting the

hose back and forth while gently pushing it onto the
tube.

(3) Using spring tension clamp pliers, compress

and slide the clamps onto each end of the heater
return hose.

(4) Refill the engine cooling system (Refer to 7 -

COOLING - STANDARD PROCEDURE).

LIQUID LINE

REMOVAL

WARNING: Refer to the applicable warnings and
cautions for this system before performing the fol-
lowing operation (Refer to 24 - HEATING & AIR
CONDITIONING/PLUMBING - WARNINGS) and (Refer
to 24 - HEATING & AIR CONDITIONING/PLUMBING -
CAUTIONS). Failure to follow the warnings and cau-
tions could result in possible personal injury or
death.

NOTE: The A/C liquid line is serviced in two sec-
tions. The front section connects between the A/C
condenser and the receiver/drier and includes the
high side service port. The rear section connects
between the receiver/drier and the A/C expansion
valve and includes the fitting for the A/C pressure
transducer.

FRONT SECTION

(1) Recover the refrigerant from the refrigerant

system (Refer to 24 - HEATING & AIR CONDITION-
ING/PLUMBING

STANDARD

PROCEDURE

REFRIGERANT SYSTEM RECOVERY).

(2) Disconnect and isolate the negative battery

cable.

(3) Remove the air cleaner housing (Refer to 9 -

ENGINE/AIR

INTAKE

SYSTEM/AIR

CLEANER

HOUSING - REMOVAL).

(4) Remove the front fascia (Refer to 13 - FRAME

BUMPERS/BUMPERS/FRONT

FASCIA

REMOVAL).

(5) Remove the four radiator sight shield retaining

pins and the radiator sight shield.

(6) Remove the right side radiator air seal retain-

ing pins and the air seal (Fig. 23).

(7) Remove the nut that secures the A/C liquid line

to the A/C condenser (Fig. 24).

(8) Disconnect the A/C liquid line from the A/C

condenser and remove and discard the O-ring seal
and gasket.

(9) Install plug in, or tape over the opened liquid

line fitting and the condenser port.

(10) Disengage the refrigerant line routing clip

located on top of the right frame rail (Fig. 25).

Fig. 23 Radiator Air Seals

1 - AIR SEAL (RT SIDE SHOWN, LT SIDE SIMILAR)
2 - UPPER RADIATOR CROSSMEMBER
3 - UPPER CONDENSER MOUNTING BOLT (2)
4 - TRANSMISSION FLUID OIL COOLER
5 - A/C CONDENSER
6 - BOLTS (4)
7 - LOWER CONDENSER MOUNT (2)
8 - UPPER AIR SEAL
9 - PUSH PINS (12)

Fig. 24 Condenser Outlet Connection

1 - NUT
2 - LIQUID LINE FITTING
2 - CONDENSER OUTLET PORT

24 - 78

PLUMBING

HEATER RETURN HOSE (Continued)

(11) Remove the bolt that secures the front section

of the A/C liquid line to the receiver/drier.

(12) Disconnect the front section of the A/C liquid

line from the receiver/drier and remove and discard
the O-ring seal.

(13) Install plug in, or tape over the opened liquid

line fitting and the receiver/drier port.

(14) Remove the front section of the A/C liquid line

from the engine compartment.

REAR SECTION

(1) Recover the refrigerant from the refrigerant

system (Refer to 24 - HEATING & AIR CONDITION-
ING/PLUMBING

STANDARD

PROCEDURE

REFRIGERANT SYSTEM RECOVERY).

(2) Disconnect and isolate the negative battery

cable.

(3) Remove the air cleaner housing (Refer to 9 -

ENGINE/AIR

INTAKE

SYSTEM/AIR

CLEANER

HOUSING - REMOVAL).

(4) Remove the A/C pressure transducer (Refer to

24 - HEATING & AIR CONDITIONING/CONTROLS
-

FRONT/A/C

PRESSURE

TRANSDUCER

REMOVAL).

(5) Remove the nut that secures the suction and

liquid line to the A/C expansion valve (Fig. 26)

(6) Disconnect the suction and liquid line from the

A/C expansion valve and remove the O-ring seals.

(7) Remove the bolt that secures the rear section

of the A/C liquid line to the receiver/drier.

(8) Disconnect the rear section of the A/C liquid

line from the receiver/drier and the A/C expansion
valve and remove and discard the O-ring seals.

(9) Install plugs in, or tape over the opened liquid

and suction line fittings, the receiver/drier port and
both expansion valve ports.

(10) Remove the rear section of the A/C liquid line

from the engine compartment.

INSTALLATION

FRONT SECTION

(1) Position the front section of the A/C liquid line

into the engine compartment.

(2) Remove the tape or plugs from the liquid line

fitting and the receiver/drier port.

(3) Lubricate a new rubber O-ring seal with clean

refrigerant oil and install it on the liquid line fitting.

(4) Connect the front section of the A/C liquid line

to the receiver/drier.

(5) Install the bolt that secures the A/C liquid line

to the receiver/drier. Tighten the bolt to 11 N·m (100
in. lbs.).

(6) Engage the front section of the A/C liquid line

into the routing clip on top of the right frame rail.

(7) Remove the tape or plugs from the condenser

port and the liquid line fitting.

(8) Lubricate a new rubber O-ring seal with clean

refrigerant oil and install it on the liquid line fitting.

(9) Connect the A/C liquid line to the A/C con-

denser.

(10) Install the nut that secures the A/C liquid line

to the A/C condenser. Tighten the nut to 23 N·m (17
ft. lbs.).

Fig. 25 A/C Liquid Line (Front Section)

1 - A/C LIQUID LINE (FRONT SECTION)
2 - BOLT
3 - RECEIVER/DRIER
4 - A/C SUCTION LINE
5 - ROUTING CLIP

Fig. 26 A/C Liquid Line (Rear Section)

1 - LIQUID LINE FITTING BOLT
2 - A/C PRESSURE TRANSDUCER
3 - NUT
4 - EVAPORATOR TEMPERATURE SENSOR
5 - A/C EXPANSION VALVE
6 - DRAIN TUBE
7 - A/C SUCTION LINE
8 - A/C LIQUID LINE (REAR SECTION)
9 - RECEIVER/DRIER

PLUMBING

24 - 79

LIQUID LINE (Continued)

(11) Install the right side radiator air seal and the

air seal retaining pins.

(12) Install the radiator sight shield and the sight

shield retaining pins.

(13) Install the front fascia (Refer to 13 - FRAME

& BUMPERS/BUMPERS/FRONT FASCIA - INSTAL-
LATION).

(14) Install the air cleaner housing (Refer to 9 -

ENGINE/AIR

INTAKE

SYSTEM/AIR

CLEANER

HOUSING - INSTALLATION).

(15) Reconnect the negative battery cable.
(16) Evacuate the refrigerant system (Refer to 24 -

HEATING & AIR CONDITIONING/PLUMBING -
STANDARD PROCEDURE - REFRIGERANT SYS-
TEM EVACUATE).

(17) Charge the refrigerant system (Refer to 24 -

HEATING & AIR CONDITIONING/PLUMBING -
STANDARD PROCEDURE - REFRIGERANT SYS-
TEM CHARGE).

REAR SECTION

(1) Position the rear section of the A/C liquid line

into the engine compartment.

(2) Remove the tape or plugs from the liquid and

suction line fittings, the receiver/drier port and both
expansion valve ports.

(3) Lubricate new rubber O-ring seals with clean

refrigerant oil and install them on the suction and
liquid line fittings.

(4) Connect the liquid and suction lines to the A/C

expansion valve.

(5) Install the nut that secures the liquid and suc-

tion lines to the A/C expansion valve. Tighten the nut
to 23 N·m (17 ft. lbs.).

(6) Lubricate a new rubber O-ring seal with clean

refrigerant oil and install it on the liquid line fitting.

(7) connect the A/C liquid line to the receiver/drier.
(8) Install the bolt that secures the A/C liquid line

to the receiver/drier. Tighten the bolt to 11 N·m (100
in. lbs.).

(9) Install the A/C pressure transducer (Refer to 24

- HEATING & AIR CONDITIONING/CONTROLS/
A/C PRESSURE TRANSDUCER - INSTALLATION).

(10) Install the air cleaner housing (Refer to 9 -

ENGINE/AIR

INTAKE

SYSTEM/AIR

CLEANER

HOUSING - INSTALLATION).

(11) Reconnect the negative battery cable.
(12) Evacuate the refrigerant system (Refer to 24 -

HEATING & AIR CONDITIONING/PLUMBING -
STANDARD PROCEDURE - REFRIGERANT SYS-
TEM EVACUATE).

(13) Charge the refrigerant system (Refer to 24 -

HEATING & AIR CONDITIONING/PLUMBING -
STANDARD PROCEDURE - REFRIGERANT SYS-
TEM CHARGE).

RECEIVER / DRIER

DESCRIPTION

The receiver/drier stores unnecessary refrigerant,

filters the refrigerant, helps remove moisture from
the refrigerant and retains any refrigerant vapor
that may leave the A/C condenser until it becomes a
liquid. The receiver/drier is installed on the high-side
of the A/C system between the front and rear sec-
tions of the A/C liquid line (Fig. 27). The receiver/
drier can be serviced by removing the air cleaner
housing.

OPERATION

The receiver/drier performs a filtering action to

prevent foreign material in the refrigerant from con-
taminating the A/C expansion valve. Refrigerant
enters the receiver/drier as a high-pressure, low tem-
perature liquid. Desiccant inside the receiver/drier
absorbs any moisture which may have entered and
become trapped within the refrigerant system. In
addition, during periods of high demand operation of
the A/C system, the receiver/drier acts as a reservoir
to store surplus refrigerant.

The receiver/drier cannot be repaired. If the receiv-

er/drier is faulty or damaged, or if the refrigerant
system has been contaminated or left open to the
atmosphere for an indeterminable period or if the
A/C compressor has failed, it must be replaced.

Fig. 27 Receiver/Drier

1 - RECEIVER/DRIER
2 - A/C LIQUID LINE (FRONT)
3 - A/C LIQUID LINE (REAR)

24 - 80

PLUMBING

LIQUID LINE (Continued)

Content .. 898 899 900 901 ..