FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM: Car repair manuals for everyone.
Home >> Buick >> 2013 >> Verano L4-2.0L Turbo >> Repair and Diagnosis >> Heating and Air Conditioning >> Service and Repair >> Procedures >> Flushing

Flushing




Flushing

Special Tools

* BO-42220 - Universal 12V Leak Detection Lamp

* GE-41447 - R-134A A/C Tracer Dye Box of 24

* GE-45268 - A/C Flush Adapter Kit

For equivalent regional tools, refer to Special Tools Heating, Ventilation, and Air Conditioning.

Note:
Flushing with the ACR 2000 is not intended to remove metal from the A/C system.

Flushing is intended to remove the following:

* Contaminated polyalkylene glycol (PAG) oil

* Desiccant, following a desiccant bag failure

* Overcharge of PAG oil

* Refrigerant contamination

Forward Flushing Setup





Note:
Forward flow refrigerant flushing is recommended for contaminated refrigerant or PAG oil.

Note:
Inspect and lubricate GE-45268 - adapter kit fitting O-rings. Refer to Air Conditioning O-Ring Seal Replacement Air Conditioning O-Ring Seal Replacement.

1. Install both GE-45268-9 - fitting O-ring onto the GE-45268-10 - adapter.

2. Install the GE-45268-8 - fitting O-ring onto the suction side of the GE-45268-10 - adapter.

3. Install the GE-45268-7 - fitting O-ring onto the discharge side of the GE-45268-10 - adapter.

Reverse Flushing Setup

Note:

* Reverse flow refrigerant flush is recommended for desiccant bag failure. Replace the condenser/receiver dehydrator assembly when the A/C flush is complete and perform the following procedure:

* Inspect and lubricate the GE-45268 - adapter kit fitting O-rings. Refer to Air Conditioning O-Ring Seal Replacement Air Conditioning O-Ring Seal Replacement.

1. Install both GE-45268-9 - fitting O-ring onto the GE-45268-10 - adapter.

2. Install the GE-45268-8 - fitting O-ring onto the suction side of the GE-45268-10 - adapter.

3. Install the GE-45268-7 - fitting O-ring onto the discharge side of the GE-45268-10 - adapter.

Flush Procedure

Note:
Warmer engine or ambient temperatures decreases refrigerant recovery time during the A/C flush procedure.

1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging Refrigerant Recovery and Recharging.

2. Remove the thermal expansion valve (TXV). Refer to Air Conditioning Evaporator Thermal Expansion Valve Replacement Service and Repair.

3. Install the TXV stud onto the GE-45268-115 - adapter.

4. Install new sealing washers onto the evaporator core. Refer to Air Conditioning O-Ring Seal Replacement Air Conditioning O-Ring Seal Replacement.

5. Install the GE-45268-115 - adapter in place of the TXV using an oversized seal washer.

Caution:
Refer to Fastener Caution Fastener Caution.

6. Install the TXV mounting bolts and tighten to 15 Nm (11 lb in).

7. Install new washers onto the liquid line and the suction hose. Refer to Air Conditioning O-Ring Seal Replacement Air Conditioning O-Ring Seal Replacement.

8. Connect the liquid line and the suction hose to the GE-45268-115 - adapter using an oversized seal washer.

9. Install the TXV block fitting nut and tighten to 19 Nm (14 lb in).

10. Remove the A/C compressor. Refer to Air Conditioning Compressor Replacement (2.4L LEA) Air Conditioning Compressor ReplacementAir Conditioning Compressor Replacement (2.0L LHU) Air Conditioning Compressor Replacement.





11. Remove the A/C refrigerant desiccant (1). Refer to Air Conditioning Refrigerant Desiccant Replacement Service and Repair.

Note:
The filter inside the GE-45268-1 - adapter is serviceable. Remove and DISCARD check valve from the filter.

12. Service the filter before each flush.

Note:
Assure that the suction and discharge ports on G-45268-10 correspond to the suction and discharge ports on the compressor hose assembly.

13. Install new sealing washers onto the A/C compressor and the condenser hose. Refer to Air Conditioning O-Ring Seal Replacement Air Conditioning O-Ring Seal Replacement. Assure that the suction and discharge ports on the GE-45268-10 - adapter correspond to the suction and the discharge ports on the A/C compressor to the condenser hose.

14. Install the GE-45268-10 - filter adapter to the A/C compressor to the condenser hose.

15. Connect the GE-45268-1 - filter to the G-45268-7 - adapter.

16. Connect the blue hose from the A/C filling device to the GE-45268 - adapter.

17. Connect the red hose from the A/C filling device to the GE-45268 - adapter.

18. Disconnect the blue hose from the A/C filling device to the GE-45268-1 - adapter.

19. Disconnect the GE-45268-1 - adapter from the GE-45268-10 - adapter.

20. Remove the GE-45268-10 - adapter from the A/C compressor to the condenser hose.

Note:
Flushing will remove all PAG oil from the A/C system. The A/C system must be replenished with the correct amount of PAG oil.

21. If you will reinstall the removed A/C compressor, perform the following procedure:

* Remove the A/C compressor drain plug. Refer to Air Conditioning Compressor Oil Drain Plug Replacement (2.4L LEA) Air Conditioning Compressor Oil Drain Plug ReplacementAir Conditioning Compressor Oil Drain Plug Replacement (2.0L LHU) Air Conditioning Compressor Oil Drain Plug Replacement.

* Drain PAG oil from the A/C compressor. Rotate compressor input shaft to assist in draining the PAG oil from compressor.

* Add the total system capacity of PAG oil to the A/C compressor. Refer to Refrigerant System Specifications [1][2]Capacity Specifications.

* Add one bottle of the GE-41447 - tracer dye.

* Install the A/C compressor drain plug. Refer to Air Conditioning Compressor Oil Drain Plug Replacement (2.4L LEA) Air Conditioning Compressor Oil Drain Plug ReplacementAir Conditioning Compressor Oil Drain Plug Replacement (2.0L LHU) Air Conditioning Compressor Oil Drain Plug Replacement.

Note:
Flushing will remove fluorescent leak detection dye from A/C system.

22. Install the A/C compressor. Refer to Air Conditioning Compressor Replacement (2.4L LEA) Air Conditioning Compressor ReplacementAir Conditioning Compressor Replacement (2.0L LHU) Air Conditioning Compressor Replacement.

23. Install the new A/C refrigerant desiccant. Refer to Air Conditioning Refrigerant Desiccant Replacement Service and Repair.

24. Remove the TXV block fitting nut.

25. Disconnect the liquid line and the suction line from the GE-45268-115 - adapter.

26. Remove the TXV bolts retaining GE-45268-115 - adapter.

27. Remove the GE-45268-115 - adapter.

28. Inspect the TXV for debris. Clean or replace as needed.

29. Install the TXV. Refer to Air Conditioning Evaporator Thermal Expansion Valve Replacement Service and Repair.

30. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging Refrigerant Recovery and Recharging.

31. Leak test fittings using the BO-42220 - lamp.

pro multis Credits:Operation CHARM About Operation CHARM