A/C Compressor - Installation
4.0L ENGINE
CAUTION: If the A/C compressor is being replaced, be certain to adjust the refrigerant system oil level 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 A/C Receiver Drier - Removal . 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, see the Refrigerant Oil Capacities chart to determine how much oil should be removed from the new A/C compressor 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.
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. When replacing multiple A/C system components, see the Refrigerant Oil Capacities chart to determine how much oil should be added to the refrigerant system Refrigerant Oil Level. Use only refrigerant oil of the type recommended for the A/C compressor in the vehicle.
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.
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 bolt (3) that secures the lower front of the A/C compressor to the accessory drive belt bracket can be installed.
3. Loosely install the bolt that secures the lower front of the A/C compressor to the accessory drive belt bracket.
4. Install the stud (4) that secures the upper front of the compressor to the accessory drive belt bracket. Tighten the stud securely.
5. Loosely install the nut (5) that secures the front of the A/C compressor to the accessory drive belt bracket.
6. Loosely install the bolt (6) that secures the rear of the A/C compressor to the engine.
7. Tighten each of the compressor fasteners to 28 Nm (21 ft. lbs.) using the following sequence:
- the upper nut at front of compressor.
- the lower bolt 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.
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 Nm (75 ft. lbs.).
13. Remove the jack stand and lower the vehicle.
14. Remove the tape or plugs from the opened refrigerant line fittings and the compressor ports.
15. 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.
16. Connect the A/C discharge line (1) and the A/C suction line (3) to the A/C compressor (4).
17. Install the nuts (2) that secure the A/C discharge and suction lines to the A/C compressor. Tighten the nuts to 12 Nm (105 in. lbs.).
18. Install the accessory drive belt Serpentine Accessory Drive Belt - Installation.
19. Install the air cleaner housing Air Cleaner Body - Installation.
20. Reconnect the negative battery cable.
21. Evacuate and charge the refrigerant system Refrigerant System Charge.