Chrysler Pacifica. Manual - part 897

(1) Select a quiet area for testing. Duplicate the com-

plaint conditions as much as possible. Turn the A/C
compressor On and Off several times to clearly identify
the compressor noise. Listen to the A/C compressor
while the clutch is engaged and disengaged. Probe the
A/C compressor with an engine stethoscope or a long
screwdriver with the handle held to your ear to better
localize the source of the noise.

(2) Loosen all of the compressor mounting hard-

ware and retighten. Check the compressor clutch
retainer. Be certain that the clutch field coil is
mounted securely to the A/C compressor, and that
the clutch plate and pulley are properly aligned and
have the correct air gap (Refer to 24 - HEATING &
AIR

CONDITIONING/CONTROLS

FRONT/

CLUTCH-A/C COMPRESSOR - INSTALLATION).

(3) To duplicate a high-ambient temperature condi-

tions (high head pressure), restrict the air flow
through the A/C condenser. Install a manifold gauge
set or a scan tool to be certain that the discharge
pressure does not exceed 2760 kPa (400 psi).

(4) Check the refrigerant system plumbing for

incorrect routing, rubbing or interference, which can
cause unusual noises. Also check the refrigerant lines
and hoses for kinks or sharp bends that will restrict
refrigerant flow, which can cause noises (Refer to 24 -
HEATING & AIR CONDITIONING/PLUMBING -
DESCRIPTION - REFRIGERANT LINES)

(5) If the noise is from opening and closing of the high

pressure relief valve, recover, evacuate and recharge the
refrigerant system (Refer to 24 - HEATING & AIR CON-
DITIONING/PLUMBING - STANDARD PROCEDURE -
REFRIGERANT SYSTEM RECOVERY), (Refer to 24 -
HEATING & AIR CONDITIONING/PLUMBING - STAN-
DARD PROCEDURE - REFRIGERANT SYSTEM EVAC-
UATE)

and

(Refer

HEATING

AIR

CONDITIONING/PLUMBING - STANDARD PROCE-
DURE - REFRIGERANT SYSTEM CHARGE).

(6) If the high pressure relief valve still does not

seat properly, replace the A/C compressor (Refer to 24
- HEATING & AIR CONDITIONING/PLUMBING -
FRONT/COMPRESSOR-A/C - REMOVAL).

REMOVAL

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

(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 radiator fan (Refer to 7 - COOL-

ING/ENGINE/RADIATOR FAN - REMOVAL).

(4) Remove the nuts that secures the suction and

discharge lines to the A/C compressor.

(5) Disconnect the suction and discharge lines

from the A/C compressor and remove and discard the
O-ring seals and gaskets.

(6) Install plugs in, or tape over the opened refrig-

erant line fittings and compressor ports.

(7) Remove the accessory drive belt (Refer to 7 -

COOLING/ACCESSORY

DRIVE/DRIVE

BELTS

REMOVAL).

(8) Disconnect the engine wire harness from the

field coil connector located on the top of the A/C com-
pressor (Fig. 5).

(9) Disengage the engine wire harness from the

wiring bracket located on the top of the A/C compres-
sor.

(10) Remove the four bolts that secure the A/C

compressor to the mounting bracket and support the
compressor.

(11) Raise and support the vehicle.
(12) Remove

the

underside

compressor

splash

shield push pins and the splash shield.

(13) Remove the A/C compressor from the compres-

sor mounting bracket.

(14) If required, remove the four bolts that secure

the compressor mounting bracket to the engine and
remove the bracket.

Fig. 5 A/C Compressor

1 - COMPRESSOR MOUNTING BRACKET
2 - WIRE HARNESS CONNECTOR
3 - A/C COMPRESSOR BOLT (4)
4 - WIRING BRACKET
5 - A/C COMPRESSOR

PLUMBING

24 - 65

A/C COMPRESSOR (Continued)

INSTALLATION

NOTE: If a replacement A/C compressor is being
installed, be certain to drain and measure the refrig-
erant oil contained in the old compressor. This will
determine how much refrigerant oil the replacement
A/C compressor must contain before it is installed
(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING/REFRIGERANT OIL - STANDARD PRO-
CEDURE - REFRIGERANT OIL LEVEL).

NOTE: The receiver/drier should always be replaced
when the A/C compressor is replaced. This will help
remove any contaminants including moisture from
the system.

(1) If removed, position the compressor mounting

bracket onto the engine and install the four retaining
bolts. Tighten the bolts to 115 N·m (85 ft. lbs.).

(2) Position the A/C compressor onto the compres-

sor mounting bracket and support the compressor.

(3) Install the underside compressor splash shield

and the push-pin retainers.

(4) Lower the vehicle.
(5) Loosely install the four bolts that secure the

A/C compressor to the compressor mounting bracket.
Tighten

each

the

bolts

using

the

following

sequence to 33 N·m (25 ft. lbs.).

• The upper bolt at the front of the compressor.

• The lower bolt at the front of the compressor.

• The upper bolt at the rear of the compressor.

• The lower bolt at the rear of the compressor.
(6) Engage the engine wire harness lead to the

wiring bracket located on the top of the A/C compres-
sor.

(7) Connect the engine wire harness to the field

coil connector.

(8) Install the accessory drive belt (Refer to 7 -

COOLING/ACCESSORY

DRIVE/DRIVE

BELTS

INSTALLATION).

(9) Remove the plugs or tape from the refrigerant

line fittings and the compressor ports.

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

refrigerant oil and install them and a new gasket
onto the suction and discharge line.

(11) Connect the suction and discharge lines to the

A/C compressor.

(12) Install the nuts that secure the suction and

discharge lines to the A/C compressor. Tighten the
nuts to 23 N·m (17 ft. lbs.).

(13) Install the radiator fan (Refer to 7 - COOL-

ING/ENGINE/RADIATOR FAN - INSTALLATION).

(14) Connect the negative battery cable.
(15) Evacuate the refrigerant system (Refer to 24 -

HEATING & AIR CONDITIONING/PLUMBING -

STANDARD PROCEDURE - REFRIGERANT SYS-
TEM EVACUATE).

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

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

A/C COMPRESSOR MOUNT

REMOVAL

(1) Remove A/C compressor from the compressor

mounting bracket and support the compressor (Refer
to 24 - HEATING & AIR CONDITIONING/PLUMB-
ING/A/C COMPRESSOR - REMOVAL).

NOTE: It is not necessary to remove A/C compres-
sor from vehicle to remove bracket from engine.

(2) Raise and support the vehicle.
(3) Remove the underside compressor splash shield

push pins and the splash shield.

(4) Remove four bolts that secure the compressor

mounting bracket to the engine and remove the
bracket (Fig. 6).

INSTALLATION

(1) Position the compressor mounting bracket to

the engine.

Fig. 6 Compressor Mounting Bracket

1 - ENGINE BLOCK MOUNTING POINTS
2 - OIL PAN MOUNTING POINTS
3 - BOLTS (4)
4 - COMPRESSOR MOUNTING BRACKET

24 - 66

PLUMBING

A/C COMPRESSOR (Continued)

(2) Install the four bolts that secure the compres-

sor mounting bracket to the engine. Tighten the bolts
to 115 N·m (85 ft. lbs.).

(3) Position the A/C compressor onto the compres-

sor mounting bracket and support the compressor.

(4) Install the underside compressor splash shield

and the push-pin retainers.

(5) Lower the vehicle.
(6) Install the A/C compressor onto the compressor

mounting bracket (Refer to 24 - HEATING & AIR
CONDITIONING/PLUMBING/A/C COMPRESSOR -
INSTALLATION).

A/C CONDENSER

DESCRIPTION

The A/C condenser (Fig. 7) is located in the front of

the engine compartment behind the front fascia. The
A/C condenser is a heat exchanger that allows the
high-pressure refrigerant gas being discharged by the
A/C compressor to give up its heat to the air passing
over the condenser fins, which causes the refrigerant
to cool and change to a liquid state.

The A/C condenser is equipped with mounting pro-

visions for the automatic transmission fluid cooler.

The A/C condenser may be removed for service

without removing the radiator from the vehicle.

OPERATION

When air passes through the fins of the A/C con-

denser, the high-pressure refrigerant gas within the
A/C condenser gives up its heat. The refrigerant then
condenses as it leaves the A/C condenser and
becomes a high-pressure liquid. The volume of air
flowing over the condenser fins is critical to the
proper cooling performance of the A/C system. There-
fore, it is important that there are no objects placed
in front of the radiator grille openings at the front of
the vehicle or foreign material on the condenser fins
that might obstruct proper air flow. Also, any factory-
installed air seals or shrouds must be properly rein-
stalled following radiator or A/C condenser service.

The A/C condenser cannot be repaired and, if

faulty or damaged, it must be replaced.

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: Before removing the A/C condenser, note the
location of each of the radiator and condenser air
seals. These seals are used to direct air through the
A/C condenser and the radiator. The air seals must
be reinstalled in their proper locations in order for
the A/C and engine cooling systems to perform as
designed.

(1) Recover the refrigerant from the refrigerant

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

STANDARD

PROCEDURE

REFRIGERANT SYSTEM RECOVERY).

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

BUMPERS/BUMPERS/FRONT

FASCIA

REMOVAL).

Fig. 7 A/C Condenser

1 - A/C CONDENSER
2 - RADIATOR
3 - TRANSMISSION FLUID COOLER

PLUMBING

24 - 67

A/C COMPRESSOR MOUNT (Continued)

(3) Remove the four radiator sight shield retaining

pins and the radiator sight shield.

(4) Remove the radiator air seal retaining pins and

the air seals (Fig. 8).

(5) Note the hood latch location on the upper radi-

ator crossmember. Mark the location of latch for rein-
stallation.

(6) Remove the two bolts that secure the hood

latch to the upper radiator crossmember and position
the latch out of the way.

(7) Remove the four bolts that secure the trans-

mission fluid oil cooler to the A/C condenser and posi-
tion the fluid cooler out of the way (Refer to 7 -
COOLING/TRANSMISSION/TRANS

COOLER

REMOVAL).

(8) Remove the nuts that secure the discharge and

liquid lines to the A/C condenser (Fig. 9).

(9) Disconnect the discharge and liquid lines from

the A/C condenser and remove the O-ring seals and
gaskets.

(10) Install plug in, or tape over the opened refrig-

erant line fittings and the condenser ports.

(11) Remove the two bolts that secure the A/C con-

denser to the radiator.

(12) Lift the A/C condenser and disengage the

lower condenser mounting brackets from the radia-
tor.

(13) Remove the A/C condenser from the engine

compartment.

INSTALLATION

NOTE: If the A/C condenser is being replaced, add
30 milliliters (1 fluid ounce) of refrigerant oil to the
refrigerant system. Use only refrigerant oil of the

type recommended for the A/C compressor in the
vehicle.

NOTE: Be certain that each of the radiator and con-
denser air seals are reinstalled in their proper loca-
tions. These air seals are required in order for the
A/C and engine cooling systems to perform as
designed.

(1) Position the A/C condenser into the engine

compartment.

(2) Engage the lower condenser mounting brackets

to the radiator.

(3) Install the two bolts that secure the A/C con-

denser to the radiator. Tighten the bolts to 5 N·m (45
in. lbs.).

(4) Remove the tape or plug from the opened

refrigerant line fittings the condenser ports.

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

refrigerant oil and install it and a new gasket onto
the discharge and liquid line fittings.

(6) Connect the discharge and liquid lines to the

A/C condenser..

(7) Install the nuts that secure the discharge and

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

(8) Postion the transmission fluid oil cooler onto

the A/C condenser and install the four retaining
bolts. Tighten the bolts to 5 N·m (45 in. lbs.).

(9) Position the hood latch to the front of the

upper radiator crossmember.

(10) Loosely install the two bolts that secure the

hood latch to the upper radiator crossmember. Check
and adjust the hood latch position as required.
Tighten the bolts to 14 N·m (123 in. lbs.).

Fig. 8 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. 9 Condenser Lines

1 - DISCHARGE LINE
2 - A/C COMPRESSOR
3 - CONDENSER
4 - LIQUID LINE
5 - NUT
6 - NUT

24 - 68

PLUMBING

A/C CONDENSER (Continued)

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