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 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.

NOTE: The A/C condenser must be replaced if an internal failure of the A/C compressor has occurred 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 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 may result in a refrigerant system leak.





1. If the A/C compressor (1) 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.
2. Position the A/C compressor to the engine and install the stud (4). Tighten the stud to 10 Nm (89 in. lbs.).
3. Loosely install the two bolts (3) and one nut (5) that secure the A/C compressor to the engine.
4. Tighten the nut and bolts to 28 Nm (21 ft. lbs.) using the following sequence:
- Nut at front of compressor.
- Bolt at front of compressor.
- Bolt at rear of compressor.

5. Connect the engine wire harness to the A/C clutch electrical connector (2).





6. Install the front belly pan.
7. Lower the vehicle.
8. Remove the tape or plugs from the opened refrigerant line fittings and the compressor ports.
9. Lubricate new seals with clean refrigerant oil and install them onto the refrigerant line fittings. Use only the specified 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.
10. Install the A/C suction line (1) and the A/C discharge line (3) onto the A/C compressor.
11. Install the nuts (2) that secure the refrigerant lines to the A/C compressor. Tighten the nuts to 20 Nm (15 ft. lbs.).
12. Install the accessory drive belt Serpentine Accessory Drive Belt - Installation.

NOTE: The A/C condenser must be replaced if an internal failure of the A/C compressor has occurred A/C Condenser - Removal .

13. Install the resonator and air cleaner housing.
14. Reconnect the negative battery cable.
15. Evacuate and charge the refrigerant system Refrigerant System Charge.