Installation

5.7L ENGINE

CAUTION: If the A/C compressor is being replaced, be certain to adjust the refrigerant system 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 accumulator must be replaced if an internal failure of the A/C compressor has occurred. Failure to replace the A/C accumulator can cause serious damage to the replacement A/C compressor.

NOTE: When replacing multiple A/C system components, refer to the Refrigerant Oil Capacities chart to determine how much oil should be removed from the new A/C compressor.

NOTE: Replacement of the refrigerant line O-ring seals and gaskets is required anytime a refrigerant line is opened. 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, refer to the Refrigerant Oil Capacities chart to determine how much oil should be added to the refrigerant system. Use only refrigerant oil of the type recommended for the A/C compressor in the vehicle.

2. Position the A/C compressor into the engine compartment.

3. Install and tighten the bolts that secure the A/C compressor to the mounting bracket (4) in the following sequence:
- Install the two lower bolts (1) and hand tighten.
- Install the rear bolt (3) and hand tighten.
- Tighten the two lower bolts to 40 Nm (30 ft. lbs.).
- Tighten the rear bolt to 55 Nm (41 ft. lbs.).

4. Install the generator support bracket.




5. Remove the tape or plugs from the opened refrigerant line fittings and the compressor ports.

6. Lubricate new O-rings and dual plane 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.

7. Install the A/C discharge line (1) and the A/C suction line (5) onto the A/C compressor (6).

8. Install the nuts (4 and 7) that secure the refrigerant lines to the A/C compressor. Tighten the nuts to 23 Nm (17 ft. lbs.).

9. Connect the wire harness connector to the clutch field coil connector and the A/C pressure transducer (8).

10. Install the accessory drive belt.

11. Reconnect the negative battery cable.

12. Evacuate the refrigerant system.

13. Charge the refrigerant system.