A/C Compressor - Installation

3.7L/4.7L ENGINES

CAUTION: If the A/C compressor is being replaced, be certain to adjust the refrigerant system oil level [1][2]Capacity Specifications . 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 condenser must be replaced if an internal failure of the A/C compressor has occurred. Failure to replace the A/C condenser can cause serious damage to the replacement A/C compressor A/C Condenser - Removal .

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 [1][2]Capacity Specifications .

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.

NOTE: 4.7L engine shown in illustrations. 3.7L engine similar.





1. If the A/C compressor (7) 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, refer to the Refrigerant Oil Capacities chart to determine how much oil should be added to the refrigerant system [1][2]Capacity Specifications. Use only refrigerant oil of the type recommended for the A/C compressor in the vehicle.
2. Position the A/C compressor onto the engine.
3. Install and tighten the bolts in the following sequence:
- Install bolt (2) and hand tighten.
- Install bolt (5) and hand tighten.
- Install bolt (6) and hand tighten.
- Tighten bolt (2) to 40 Nm (30 ft. lbs.).
- Tighten bolt (5) to 55 Nm (41 ft. lbs.).
- Tighten bolt (6) to 55 Nm (41 ft. lbs.).
- Tighten bolt (4) to 55 Nm (41 ft. lbs.).

4. Connect the engine wire harness connector (1) to the A/C compressor.





5. Remove the tape or plugs from the opened refrigerant line fittings and the compressor ports.
6. Lubricate new O-ring seals with clean refrigerant oil and install them and new gaskets onto the refrigerant line fittings. Use only the specified O-ring 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.
7. Install the A/C discharge line (2) and the A/C suction line (4) onto the A/C compressor (1).
8. Install the nuts (5) that secure the refrigerant lines to the A/C compressor. Tighten the nuts to 23 Nm (17 ft. lbs.).
9. Install the accessory drive belt (3) Serpentine Accessory Drive Belt - Installation.
10. Install the resonator Air Cleaner Body - Installation.
11. Reconnect the negative battery cable.
12. Evacuate and charge the refrigerant system Refrigerant System Charge.