Compressor HVAC: Service and Repair

A/C Compressor Replacement

R18A1 Engine

NOTE: Do not install an 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 front grille cover Front Grille Cover Replacement and the alternator; R18A1 engine, Service and Repair K20Z3 engine. Service and Repair

4. Disconnect the connector (A) from the A/C condenser fan motor. Remove the wire harness clip (B) and the connector clip (C). Remove the upper mounting bolts, and the A/C condenser fan shroud (D). Be careful not to damage the radiator fins when removing the A/C condenser fan shroud.






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






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

7. 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.

- If you're installing a new A/C compressor, you must calculate the amount of refrigerant oil to be removed from it. A/C Refrigerant Oil Replacement 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 only PAG refrigerant oil (SP-10) for HFC-134a A/C systems.

- 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.

- Charge the system. A/C System Charging