Jeep Grand Cherokee WK. Manual — part 1783
8. Disconnect the A/C discharge line from the A/C condenser and remove and discard the dual plane seal.
9. Install plugs in, or tape over the opened discharge line fittings and the compressor and condenser ports.
10. Remove the A/C discharge line from the engine compartment.
5.7L ENGINE
WARNING: Refer to the applicable warnings and cautions for this system before performing the following
operation (Refer to 24 - HEATING & AIR CONDITIONING/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 CONDITIONING/
PLUMBING
-
STANDARD
PROCEDURE
-
REFRIGERANT SYSTEM RECOVERY).
2. Disconnect and isolate the negative battery cable.
3. Remove the grille (Refer to 23 - BODY/EXTERIOR/
GRILLE - REMOVAL).
4. Remove the air cleaner housing, air intake tube
and the resonator (Refer to 9 - ENGINE/AIR
INTAKE
SYSTEM/HOUSING-AIR
CLEANER
-
REMOVAL).
5. Disconnect the wire harness connector (8) from the
A/C pressure transducer (7) and remove the trans-
ducer from the A/C discharge line (5), if required.
6. Remove the nut (6) that secures the A/C discharge
line to the A/C condenser (4).
7. Disconnect the A/C discharge line from the A/C
condenser and the retaining bracket (9) and
remove and discard the dual plane seal.
8. Remove the nut (2) that secures the A/C discharge
line (1) to the A/C compressor (4).
9. Disconnect the A/C discharge line from the A/C
compressor and remove and discard the dual plane
seal.
10. Install plugs in, or tape over the opened refriger-
ant line fittings and the compressor and con-
denser ports.
11. Remove the A/C discharge line from the engine
compartment.
24 - 480
PLUMBING
WK
INSTALLATION
3.7L/4.7L ENGINES
1. Position the A/C discharge line (4) into the engine
compartment.
2. Remove the tape or plugs from the discharge line
fittings and the A/C compressor (2) and A/C con-
denser (3).
3. Lubricate new dual plane seals with clean refriger-
ant oil and install them onto the A/C discharge line.
Use only the specified seals 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 A/C discharge line onto the A/C com-
pressor.
5. Install the nut (1) that secures the A/C discharge
line to the A/C compressor. Tighten the nut to 20
N·m (15 ft. lbs.).
6. Install the A/C discharge line onto the A/C con-
denser.
7. Install the nut (5) that secures the A/C discharge line to the A/C condenser. Tighten the nut to 20 N·m (15 ft.
lbs.).
8. Install the air cleaner housing, air intake tube and the resonator (Refer to 9 - ENGINE/AIR INTAKE SYSTEM/AIR
CLEANER HOUSING - INSTALLATION).
9. Install the grille (Refer to 23 - BODY/EXTERIOR/GRILLE - INSTALLATION).
10. Reconnect the negative battery cable.
11. Evacuate the refrigerant system (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - STANDARD
PROCEDURE - REFRIGERANT SYSTEM EVACUATE).
12. Charge the refrigerant system (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - STANDARD PRO-
CEDURE - REFRIGERANT SYSTEM CHARGE).
5.7L ENGINE
1. Position the A/C discharge line (1) into the engine
compartment.
2. Remove the tape or plugs from the opened dis-
charge line fittings and the compressor and con-
denser ports.
3. Lubricate new dual plane seals with clean refriger-
ant oil and install them onto the discharge line fit-
tings. Use only the specified seals 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 A/C discharge line onto the A/C com-
pressor (4).
5. Install the nut (2) that secures the A/C discharge
line to the A/C compressor. Tighten the nut to 20
WK
PLUMBING
24 - 481
N·m (15 ft. lbs.).
6. Install the A/C discharge line (5) into the retaining
bracket (9) and to the A/C condenser (4).
7. Install the nut (6) that secures the A/C discharge
line to the A/C condenser. Tighten the nut to 20
N·m (15 ft. lbs.).
8. If removed, install the A/C pressure transducer (7)
onto the A/C discharge line. Tighten the A/C pres-
sure transducer securely.
9. Connect the wire harness connector (8) to the A/C
pressure transducer.
10. Install the air cleaner housing, air intake tube and
the resonator (Refer to 9 - ENGINE/AIR INTAKE
SYSTEM/HOUSING-AIR CLEANER - INSTALLA-
TION).
11. Install the grille (Refer to 23 - BODY/EXTERIOR/
GRILLE - INSTALLATION).
12. Reconnect the negative battery cable.
13. Evacuate the refrigerant system (Refer to 24 -
HEATING & AIR CONDITIONING/PLUMBING -
STANDARD
PROCEDURE
-
REFRIGERANT
SYSTEM EVACUATE).
14. Charge the refrigerant system (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - STANDARD PRO-
CEDURE - REFRIGERANT SYSTEM CHARGE).
LINE-A/C LIQUID
DESCRIPTION
The A/C liquid line (1) is the refrigerant line that car-
ries refrigerant from the reciever/drier to the A/C
expansion valve (2). The A/C liquid is serviced in one
section and is secured to the right side frame (3) rail
by two plastic retainer clips (4).
CAUTION: Use only seals specified for the vehicle.
Failure to use the correct seals will cause the
refrigerant system connections to leak.
The A/C liquid line has no serviceable parts except for
the O-ring and dual plane seal. The seals used on the
connections are made from a special type of rubber
not affected by R-134a refrigerant. The seals must be
replaced whenever the A/C liquid line is removed and
installed.
If the A/C liquid line is found to be leaking or dam-
aged, it must be replaced.
24 - 482
PLUMBING
WK
REMOVAL
WARNING: Refer to the applicable warnings and cautions for this system before performing the following
operation (Refer to 24 - HEATING & AIR CONDITIONING/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 CONDITIONING/
PLUMBING
-
STANDARD
PROCEDURE
-
REFRIGERANT SYSTEM RECOVERY).
2. Disconnect and isolate the negative battery cable.
3. Remove the air cleaner housing, air intake tube
and the resonator (Refer to 9 - ENGINE/AIR
INTAKE
SYSTEM/HOUSING-AIR
CLEANER
-
REMOVAL).
NOTE: 4.7L engine shown in illustration. Vehicles
equipped with other engines are similar.
4. Remove the nut (3) that secures the A/C suction
line (2) and the A/C liquid line (10) to the A/C
expansion valve (1).
5. Disconnect the A/C suction line from the A/C
expansion valve and remove and discard the
O-ring seal.
6. Remove the nut (1) that secures the A/C liquid line
(2) to the receiver/drier (3).
7. Disconnect the A/C liquid line from the receiver/
drier and remove and discard the dual plane seal.
WK
PLUMBING
24 - 483
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