Dodge Durango (HB). Manual — part 1570
4. Remove the rear air inlet housing from the rear HVAC housing.
5. Remove the insulator (1) from around the rear A/C
evaporator tubes (2) to gain access the two rear
A/C expansion valve bolts (3).
6. Remove the two bolts that secure the rear A/C
evaporator tubes to the rear A/C expansion valve
(4) and the rear evaporator extension tube tapping
block (5).
7. Carefully lift the rear A/C evaporator (6) out of the
top of the rear HVAC housing (7).
8. Remove the rear A/C expansion valve from the
rear evaporator extension tube tapping block and
remove and discard the O-ring seals.
9. Install plugs in, or tape over the opened rear evap-
orator and extension tube fittings and all rear
expansion valve ports.
INSTALLATION
NOTE: If the rear A/C evaporator 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.
1. Carefully position the rear A/C evaporator (6) into
the top of the rear HVAC housing (7).
2. Remove the tape or plugs from the opened rear
evaporator and extension tube fittings and all rear
expansion valve ports.
3. Lubricate new rubber O-ring seals with clean refrig-
erant oil and install them on the evaporator tube
and extension tube fittings. Use only the specified
O-rings as they are made of a special material for
the R-134a system. Use only refrigerant oil of the
type recommended for the A/C compressor in the
vehicle.
4. Install the rear A/C expansion valve (4) between
the rear A/C evaporator tubes (2) and the rear
extension tube tapping block (5).
5. Install the two bolts (3) that secure the rear A/C
expansion valve between the rear A/C evaporator
tubes and the rear extension tube tapping block.
Tighten the bolts to 11 N·m (97 in. lbs.).
6. Install a new insulator (1) around the rear A/C evaporator tubes.
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PLUMBING - REAR
24 - 473
7. Position the rear air inlet housing (6) onto the rear
HVAC housing (1).
8. Install the screws (5) that secure the rear air inlet
housing to the rear HVAC housing. Tighten the
screws to 2 N·m (17 in. lbs.).
9. Connect the rear HVAC wire harness (2) to the rear
blower motor (3) and the rear blower motor resistor
(4).
10. Install the rear HVAC housing (Refer to 24 -
HEATING & AIR CONDITIONING/DISTRIBUTION
- REAR/HOUSING-HVAC - INSTALLATION).
LINE-A/C LIQUID
DESCRIPTION
The liquid line (1) is the refrigerant line that carries
refrigerant from the A/C condenser to the rear A/C
evaporator. The liquid line serviced in two sections
and includes a tapping plate (4) that retains the suc-
tion line (3) (Refer to 24 - HEATING & AIR CONDI-
TIONING/PLUMBING - FRONT/LINE-A/C LIQUID -
DESCRIPTION). Models equipped with the rear heat-
ing-A/C system include an extension tube (8) that con-
nects the liquid line to the underbody line by use of a
spring-lock type refrigerant line coupler (6) and a sec-
ondary retaining clip (7).
CAUTION: Use only O-ring seals specified for the
vehicle. Failure to use the correct O-ring seal will
cause the refrigerant system connections to leak.
The liquid line has no serviceable parts except for the
rubber O-ring seals. The O-ring seals used on the
connections are made from a special type of rubber
not affected by R-134a refrigerant. The O-ring seals
must be replaced whenever the liquid line is removed and installed.
If the liquid line is found to be leaking or is damaged, it must be replaced.
REMOVAL
WARNING: Refer to the applicable warnings and cautions for this system before performing the following
operation (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - FRONT - WARNINGS) and (Refer to 24
- HEATING & AIR CONDITIONING/PLUMBING - FRONT - CAUTIONS). Failure to follow the warnings and cau-
tions could result in possible personal injury or death.
24 - 474
PLUMBING - REAR
HB
NOTE: The A/C liquid line is serviced in two sections. The front section connects between the A/C con-
denser and the receiver/drier. The rear section connects between the receiver/drier and the front A/C expan-
sion valve. On models equipped with the rear heating-A/C system, the rear section of the A/C liquid line also
includes an extension tube that connects the liquid line to the underbody lines.
1. Recover the refrigerant from the refrigerant system
(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING - FRONT - STANDARD PROCEDURE
- REFRIGERANT SYSTEM RECOVERY).
2. Disconnect and isolate the negative battery cable.
3. Disconnect the A/C liquid line (1) from the receiver/
drier and the front A/C expansion valve (Refer to
24 - HEATING & AIR CONDITIONING/PLUMBING
- FRONT/LINE-A/C LIQUID - REMOVAL).
4. Remove the secondary retaining clip (7) from the
refrigerant line coupler (6) on the liquid line exten-
sion tube (8)
5. Disconnect the underbody liquid line from the liquid
line extension tube and remove and discard the
O-ring seal (Refer to 24 - HEATING & AIR CONDI-
TIONING/PLUMBING -REAR/COUPLER-REFRIG-
ERANT LINE - REMOVAL).
6. Install plugs in, or tape over the refrigerant line
coupler and the underbody liquid line.
7. Remove the A/C liquid line from the engine compartment.
INSTALLATION
NOTE: The A/C liquid line is serviced in two sections. The front section connects between the A/C con-
denser and the receiver/drier. The rear section connects between the receiver/drier and the front A/C expan-
sion valve. On models equipped with the rear heating-A/C system, the rear section of the A/C liquid line also
includes an extension tube that connects the liquid line to the underbody lines.
1. Install the A/C liquid line (1) to the receiver/drier
and the front A/C expansion valve (Refer to 24 -
HEATING & AIR CONDITIONING/PLUMBING -
FRONT/LINE-A/C LIQUID - INSTALLATION.
2. Remove the tape or plugs from the refrigerant line
coupler (6) and the underbody liquid line.
3. Lubricate a new rubber O-ring seal with clean
refrigerant oil and install it onto the refrigerant line
coupler. Use only the specified O-ring as it is made
of a special material for the R-134a system. Use
only refrigerant oil of the type recommended for the
A/C compressor in the vehicle.
4. Connect the underbody liquid line to liquid line
extension tube (8) (Refer to 24 - HEATING & AIR
CONDITIONING/PLUMBING - REAR/COUPLER-
REFRIGERANT LINE - INSTALLATION).
5. Install the secondary retaining clip (7) onto the
refrigerant line coupler.
6. Reconnect the negative battery cable.
7. Evacuate the refrigerant system (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - FRONT - STAN-
DARD PROCEDURE - REFRIGERANT SYSTEM EVACUATE).
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PLUMBING - REAR
24 - 475
8. Charge the refrigerant system (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - FRONT - STAN-
DARD PROCEDURE - REFRIGERANT SYSTEM CHARGE).
LINE-A/C SUCTION
DESCRIPTION
The suction line (3) is the refrigerant line that carries
refrigerant from the rear A/C evaporator to the A/C
compressor. The suction line is retained into the liquid
line tapping block (4) by a plastic retainer (Refer to 24
- HEATING & AIR CONDITIONING/PLUMBING -
FRONT/LINE-A/C SUCTION - DESCRIPTION). Mod-
els equipped with the rear heating-A/C system include
an extension tube (5) that connects the suction line to
the underbody line by use of a spring-lock type refrig-
erant line coupler (6) and a secondary retaining clip
(2).
CAUTION: Use only O-ring seals specified for the
vehicle. Failure to use the correct O-ring seal will
cause the refrigerant system connections to leak.
The suction line has no serviceable parts except for
the rubber O-ring seals. The O-ring seals used on the
connections are made from a special type of rubber
not affected by R-134a refrigerant. The O-ring seals
must be replaced whenever the suction line is removed and installed.
If the suction line is found to be leaking or is damaged, it must be replaced.
REMOVAL
WARNING: Refer to the applicable warnings and cautions for this system before performing the following
operation (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - FRONT - WARNINGS) and (Refer to 24
- HEATING & AIR CONDITIONING/PLUMBING - FRONT - CAUTIONS). Failure to follow the warnings and cau-
tions could result in possible personal injury or death.
NOTE: The A/C suction line connects between the A/C evaporator and the A/C compressor. On models
equipped with the rear heating-A/C system, the A/C suction line also includes an extension tube that con-
nects the suction line to the underbody lines.
24 - 476
PLUMBING - REAR
HB
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