Dodge Nitro. Manual - part 762

Fig. 130: A/C Compressor Components
Courtesy of CHRYSLER LLC

1. If the A/C compressor (2) is being replaced, the refrigerant oil in the old compressor must be first drained

and measured. Then the oil in the new A/C compressor must be drained. Finally, the new compressor
must be refilled with the same amount of new refrigerant oil that was drained out of the old compressor.
See REFRIGERANT OIL LEVEL for more information. When replacing multiple A/C system
components, refer to the Refrigerant Oil Capacities chart to determine how much oil should be added to
the refrigerant system Use only refrigerant oil of the type recommended for the A/C compressor in the
vehicle.

2. Position the A/C compressor to the intake manifold (9) and the engine front cover (7).

3. Install and hand tighten the three compressor retaining bolts (1, 4 and 5).

4. Tighten the bolts in the following sequence:



The rear bolt (1) to 55 N.m (41 ft. lbs.).



The front inboard bolt (5) to 40 N.m (30 ft. lbs.).



The front outboard bolt (4) to 55 N.m (41 ft. lbs.).

5. Tighten the bolt (6) that secures the compressor bracket (8) to the engine front cover to 40 N.m (30 ft.

lbs.).

6. Connect the engine wire harness to the A/C clutch field coil connector (3).

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Service Information - Nitro

Fig. 131: Removing/Installing Nuts That Secure A/C Suction Line And A/C Discharge Line To A/C
Compressor
Courtesy of CHRYSLER LLC

7. Remove the tape or plugs from the opened refrigerant line fittings and the compressor ports.

8. Lubricate new O-ring seals with clean refrigerant oil and install them and new gaskets on the refrigerant

line 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.

9. Connect the A/C suction line (1) and the A/C discharge line (3) to the A/C compressor (4).

10. Install the nuts (2) that secure the A/C suction and discharge lines to the A/C compressor. Tighten the

nuts to 12 N.m (105 in. lbs.).

11. Install the accessory drive belt. Refer to INSTALLATION .

12. Install the air cleaner housing (refer to INSTALLATION for 3.7L - SERVICE INFORMATION or

INSTALLATION for 4.0L - SERVICE INFORMATION ).

13. Reconnect the negative battery cable.

14. Evacuate the refrigerant system. See REFRIGERANT SYSTEM EVACUATE.

15. Charge the refrigerant system. See REFRIGERANT SYSTEM CHARGE.

4.0L ENGINE

CAUTION: If the A/C compressor is being replaced, be certain to adjust the refrigerant

system oil level. See REFRIGERANT OIL LEVEL. Failure to properly adjust
the refrigerant oil level will prevent the A/C system from operating as
designed and can cause serious A/C compressor damage.

CAUTION: The A/C receiver/drier must be replaced if an internal failure of the A/C

compressor has occurred. Failure to replace the A/C receiver/drier can
cause serious damage to the replacement A/C compressor.

NOTE:

When replacing multiple A/C system components, refer to the Refrigerant Oil

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Service Information - Nitro

Fig. 132: Removing/Installing A/C Compressor
Courtesy of CHRYSLER LLC

1. If the A/C compressor (2) is being replaced, the refrigerant oil in the old compressor must be first drained

2. Using a suitable floor jack and a block of wood under the oil pan to protect from damage, raise the right

side of the engine until the stud (3) that secures the lower front of the A/C compressor to the accessory
drive belt bracket can be installed.

3. Install the stud that secures the lower front of the A/C compressor to the accessory drive belt bracket.

Tighten the stud securely.

4. Install the stud (5) that secures the upper front of the compressor to the accessory drive belt bracket.

Tighten the stud securely.

5. Loosely install the nuts (4 and 6) that secure the front of the A/C compressor to the accessory drive belt

bracket.

Capacities chart to determine how much oil should be removed from the new
A/C compressor. See REFRIGERANT OIL LEVEL.

NOTE:

Replacement of the refrigerant line O-ring seals and gaskets is required anytime
a refrigerant line is disconnected. Failure to replace the rubber O-ring seals and
metal gaskets could result in a refrigerant system leak.

CAUTION: Use care when raising the engine when performing this procedure.

Be sure to protect the bottom of the engine and various other
components from damage.

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Service Information - Nitro

6. Loosely install the bolt (7) that secures the rear of the A/C compressor to the engine.

7. Tighten each of the compressor fasteners to 28 N.m (21 ft. lbs.) using the following sequence:



The upper nut at front of compressor.



The lower nut at front of compressor.



The bolt at the rear of compressor.

8. Lower the right side of the engine and remove the jack and wood block.

9. Connect the engine wire harness to the A/C clutch field coil connector (1).

10. Lower the engine and remove the floor jack.

Fig. 133: Removing/Installing Nut From Through Bolt On Right Side Engine Mount
Courtesy of CHRYSLER LLC

11. Raise and support the vehicle.

12. Support the engine with a suitable jack and install the through bolt (1) and nut (3) to the right side engine

mount (3). Tighten the nut to 101 N.m (75 ft. lbs.).

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Service Information - Nitro

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