Compressor HVAC: Service and Repair

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. Recover the refrigerant with a recovery/recycling/charging station. A/C Refrigerant Recovery

3. Remove the drive belt. Service and Repair

4. Remove the condenser fan shroud. Service and Repair

5. Disconnect the A/C compressor clutch connector (A). Remove the bolts and the nut, then disconnect the suction hose (B) and the discharge hose (C) from the A/C compressor. Remove the O-rings (D). Plug or cap the lines immediately after disconnecting them to avoid moisture and dust contamination.

6. Raise the vehicle on a lift, then remove the front splash shield. Front Splash Shield Replacement






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

- 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 only refrigerant oil (DENSO ND-OIL 8) for HFC-134a DENSO A/C compressors 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 compressor and the A/C condenser fan shroud.

- Charge the system. A/C System Charging