Compressor HVAC: Service and Repair
COMPRESSOR - A/CREMOVAL
WARNING: refer to the applicable warnings and cautions for this system before performing the following operation. Failure to follow the warnings and cautions could result in possible personal injury or death.
NOTE: The A/C compressor may be removed and repositioned without disconnecting the refrigerant lines or discharging the refrigerant system. Discharging is not necessary if servicing the compressor clutch, clutch coil, engine, engine cylinder head or the generator.
1. Disconnect and isolate the negative battery cable.
2. Recover the refrigerant from the refrigerant system.
3. Remove the resonator from the engine.
4. Remove the serpentine drive belt
5. Disconnect the wire harness connector from the A/C compressor clutch coil.
6. Disconnect the A/C suction and discharge lines from the A/C compressor and remove and discard the O-ring seals and gaskets.
7. Install plugs in, or tape over all of the opened refrigerant line fittings and the compressor ports.
8. Loosen the bolt (5) that secures the bracket (7) to the accessory mounting bracket (4).
9. Remove the bolts (1, 6 and 3) that secure the A/C compressor (2) to the accessory mounting bracket.
10. Remove the A/C compressor from the engine compartment.
INSTALLATION
CAUTION:
- Be certain to adjust the refrigerant oil level when servicing the A/C refrigerant system. 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.
- The A/C accumulator must be replaced if an internal failure of the A/C compressor has occurred. Failure to replace the A/C accumulator can cause serious A/C compressor damage.
NOTE:
- When replacing multiple A/C system components, refer to the Refrigerant Oil Capacities chart to determine how much oil should be added to the refrigerant system.
- If only the A/C accumulator is being replaced, add 90 milliliters (3 fluid ounces) of refrigerant oil to the refrigerant system. Use only refrigerant oil of the type recommended for the A/C compressor in the vehicle.
- Replacement of the refrigerant line O-ring seals and gaskets is required anytime a refrigerant line is opened. Failure to replace the rubber O-ring seals and metal gaskets could result in a refrigerant system leak.
1. If the A/C compressor (2) 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, refer to the Refrigerant Oil Capacities chart to determine how much oil should be added to the refrigerant system. Use only refrigerant oil of the type recommended for the A/C compressor in the vehicle.
2. Position the A/C compressor onto the accessory mounting bracket (4).
3. Install and tighten the bolts in the following sequence:
- Install bolt (3) and hand tighten.
- Install bolt (6) and hand tighten.
- Install bolt (1) and hand tighten.
- Tightened bolt (3) to 40 N.m (30 ft. lbs.).
- Tightened bolt (6) to 55 N.m (41 ft. lbs.).
- Tightened bolt (1) to 55 N.m (41 ft. lbs.).
- Tightened bolt (5) to 55 N.m (41 ft. lbs.).
4. Lubricate new rubber O-ring seals with clean refrigerant oil and install them and new gaskets onto the suction and discharge line fittings. Use only the specified O-rings 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.
5. Connect the A/C suction and discharge lines onto the A/C compressor.
6. Connect the wire harness connector to the A/C compressor clutch coil.
7. Install the serpentine drive belt.
8. Install the resonator onto the engine.
9. Reconnect the negative battery cable.
10. Evacuate the refrigerant system.
11. Charge the refrigerant system.