Compressor HVAC: Service and Repair
AIR CONDITIONING (A/C) COMPRESSORPart 1:
Part 2:
Removal and Installation
CAUTION: If installing a new air conditioning (A/C) compressor due to an internal failure of the old unit, the following procedures must be carried out to remove contamination from the A/C system. Failure to remove contamination from the A/C system, if present, will result in poor A/C system performance and/or damage to the new A/C compressor and other components.
- If A/C flushing equipment is available, carry out the A/C system flushing procedure prior to installing a new A/C compressor.
- If A/C flushing equipment is not available, carry out the refrigerant system filtering procedure following A/C compressor installation.
- Install a new thermostatic expansion valve (TXV), as directed by the A/C flushing or filtering procedure.
- Install a new receiver/drier as directed by the A/C flushing or filtering procedure.
NOTE: Installation of a new receiver/drier is not required when repairing the A/C system, except when there is physical evidence of contamination from a failed A/C compressor or damage to the receiver/drier. Damage to the receiver/drier includes leaks in the receiver/drier, physical damage to the receiver/drier shell or desiccant, or moisture contamination. Moisture contamination results only from a complete loss of refrigerant, and equalization of the refrigerant system pressure with atmospheric pressure for a period longer than one hour. If even a slight amount of positive refrigerant pressure is present, and physical evidence of contamination from an A/C compressor failure is not present in the system before repairs are carried out, a new receiver/drier should not be installed.
All vehicles
1. With the vehicle in NEUTRAL, position it on a hoist
2. Recover the refrigerant.
3. NOTE: The A/C compressor discharge line is held in place by a bracket attached to the lower rear A/C compressor stud-bolt. The A/C compressor discharge fitting cannot be easily disconnected until later in this procedure when the bracket is detached.
Remove the A/C compressor suction and discharge fitting nuts and disconnect the suction fitting.
- Discard the O-ring seal and gasket seal.
- To install, tighten to 15 Nm (133 lb-in).
Vehicles with manual transmission
4. Remove the engine cooling fan assembly.
Vehicles with automatic transmission
5. Remove the lower radiator air deflector.
All vehicles
6. Remove the 2 drive belt shield bolts and remove the shield.
7. Release the tensioner and remove the drive belt from the A/C compressor pulley.
8. Remove the power steering line bracket nut at the transmission.
- To install, tighten to 9 Nm (80 lb-in).
9. Remove the compressor-to-condenser discharge line bracket nut from the lower rear A/C compressor stud-bolt and detach the discharge line and power steering line brackets.
- To install, tighten to 9 Nm (80 lb-in).
10. Disconnect the A/C compressor discharge fitting.
- Discard the O-ring seal and gasket seal.
11. Disconnect the clutch field coil electrical connector.
12. Remove the 2 A/C compressor bolts and the A/C compressor stud-bolt.
- To install, tighten to 25 Nm (18 lb-ft).
13. Remove the A/C compressor.
14. To install, reverse the removal procedure.
- Install new gasket seals and O-ring seals.
- Lubricate the refrigerant system with the correct amount of clean PAG oil.
15. Evacuate, leak test and charge the refrigerant system.