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.

CAUTION: The A/C receiver/drier must be replaced if an internal failure of the A/C compressor has occurred. Failure to replace the A/C receiver/drier can cause serious damage to the replacement A/C compressor.

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 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, 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 into the engine compartment.
3. Loosely install the bolts (1) that secure the A/C compressor and the automatic transmission cooler line bracket (2) to the cylinder block (4).
4. Tighten the bolts in the following order to 26 Nm (19 ft. lbs.).
1. Upper front bolt
2. Lower front bolt
3. Upper rear bolt
4. Lower rear bolt

5. Install the front belly pan Belly Pan - Installation.
6. Lower the vehicle.






NOTE: Typical A/C compressor and refrigerant lines shown.

7. Remove the tape or plugs from the opened fittings on the A/C suction line (3) and the A/C discharge line (4) and the compressor ports.
8. Lubricate new dual plane seals with clean refrigerant oil and install them onto the suction and the discharge 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.
9. Connect the suction and discharge lines onto the A/C compressor (5).
10. Install the nuts (2) that secure the suction and discharge lines to the A/C compressor. Tighten the nuts to 23 Nm (17 ft. lbs.).
11. Connect the engine wire harness to the A/C clutch connector (1).
12. Install the accessory drive belt Serpentine Accessory Drive Belt - Installation.
13. Replace the A/C receiver/drier if the A/C compressor is being replaced due to an internal failure A/C Receiver Drier - Removal.
14. Install the air cleaner housing Air Cleaner Body - Installation.
15. Reconnect the negative battery cable.
16. Evacuate and charge the refrigerant system Refrigerant System Charge.