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 Refrigerant Oil Capacity . 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 Refrigerant Oil Capacity .

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 systemRefrigerant Oil Capacity. 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.