A/C Compressor Replacement

NOTE: Do not install the A/C compressor into a system unless you are completely sure that the system is free of contamination. Installing the A/C compressor into a contaminated system can result in premature A/C compressor failure.

1.If the A/C compressor is marginally operable, run the engine at idle speed, and let the air conditioning work for a few minutes, then shut the engine off.

2.Make sure you have the anti-theft codes for the radio, then write down radio channel presets.

3.Make sure the ignition switch is OFF, then disconnect the negative cable from the battery.

4.Recover the refrigerant with a recovery/recycling/charging station.

5.Remove the the alternator.

6.Disconnect the A/C compressor clutch connector (A). Remove the bolt and the nut, then disconnect the suction line (B) and discharge line (C) from the A/C compressor. Plug or cap the lines immediately after disconnecting them to avoid moisture and dust contamination.


7.Remove the mounting bolts and the A/C compressor. Be careful not to damage the radiator fins when removing the A/C compressor.


8.Install the A/C compressor in the reverse order of removal, and note these items:

  • Inspect the A/C lines for any signs of contamination. Purge the system if necessary before installing the A/C compressor.
  • If you're installing a new A/C compressor, you must calculate the amount of refrigerant oil to be removed from it. A new A/C compressor comes with a full charge of oil.
  • Replace the O-rings with new ones at each fitting, and apply a thin coat of refrigerant oil before installing them. Be sure to use the correct O-rings for HFC-134a (R-134a) to avoid leakage.
  • Use refrigerant oil (DENSO ND-OIL 8) for HFC-134a DENSO piston type A/C compressor only.
  • To avoid contamination, do not return the oil to the container once dispensed, and never mix it with other refrigerant oils.
  • Immediately after using the oil, reinstall the cap on the container, and seal it to avoid moisture absorption.
  • Do not spill the refrigerant oil on the vehicle; it may damage the paint; if the refrigerant oil contacts the paint, wash it off immediately.
  • Be careful not to damage the radiator fins when installing the A/C compressor and the A/C condenser fan shroud.
  • Charge the system.
  • Enter the anti-theft codes for the radio, then enter the customer's radio channel presets.