A/C Compressor - Installation

5.7L ENGINE

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.





1. If the A/C compressor (3) 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 to the engine.
3. If removed, install and securely tighten the two studs (3) that secure the A/C compressor to the engine.
4. Loosely install the three bolts (1 and 2) that secure the A/C compressor to the engine.
5. Tighten each of the bolts to 28 Nm (21 ft. lbs.) using the following sequence:
- Upper bolt at front of compressor.
- Lower bolt at front of compressor.
- Bolt at rear of compressor.

6. Connect the engine wire harness connector to the A/C compressor.





7. Remove the tape or plugs from the opened refrigerant line fittings and the compressor ports.
8. Lubricate new O-rings 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.
9. Install the A/C discharge line (3) and the A/C suction line (1) onto the A/C compressor (4).
10. Install the nuts (2) that secure the A/C discharge and suction lines to the A/C compressor. Tighten the nuts to 23 Nm (17 ft. lbs.).
11. Lower the vehicle.
12. Engage the plastic refrigerant line bracket to the upper front of the engine A/C Discharge Line - Installation.
13. Install the accessory drive belt (5) Serpentine Accessory Drive Belt - Installation.
14. Reconnect the negative battery cable.
15. Evacuate and charge the refrigerant system Refrigerant System Charge.