Flushing
TOOLS REQUIRED^ J 43600 ACR 2000 Air Conditioning Service Center
^ J 45268 A/C Flushing Adapter Kit
^ J 41447 R-134A A/C Tracer Dye - Box of 24
^ J 41459 R-134A - A/C Tracer Dye Injector
^ J 42220 Universal 12 V Leak Detection Lamp
IMPORTANT: Flushing is not intended to remove metal from the A/C system.
Flushing is intended to remove the following:
^ Contaminated PAG oil
^ Desiccant, following a desiccant bag failure
^ Overcharge of PAG oil
^ Refrigerant contamination
IMPORTANT: Warmer engine or ambient temperature decreases the refrigerant recovery time during the A/C flush procedure.
1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging.
2. Remove the TXV.
3. Install the J 45268-103 in place of the TXV.
4. Remove the auxiliary TXV.
5. Install the J 45268-107 in place of the auxiliary TXV.
6. Remove the A/C compressor.
7. Install the J 45268-5 to the discharge hose.
8. Install the J 45268-4 to the suction hose.
9. Forward flow refrigerant flushing is recommended for contaminated refrigerant or PAG oil. Perform the following procedure:
IMPORTANT: The filter inside the J 45268-1 is serviceable. Remove and discard the check valve from the filter.
9.1. Service the filter with ACDelco P/N GF 470, before each flush.
9.2. Connect the J 45268-1 to the suction port of the J 45268-4.
9.3. Connect the blue hose from the J 43600 to the J 45268-1 flush filter adapter.
9.4. Connect the red hose from the J 43600 to the J 45268-5 flush adapter.
10. Reverse flow refrigerant flushing is recommended for desiccant bag failure.
Replace the receiver dehydrator when the A/C flush is complete and perform the following procedure:
IMPORTANT: The filter inside the J 45268-1 is serviceable.
10.1. Service the filter with ACDelco P/N GF 470, before each flush.
10.2. Connect the J 45268-1 to the discharge port of the J 45268-5.
10.3. Connect the blue hose from the J 43600 to the J 45268-1 flush filter adapter.
10.4. Connect the red hose from the J 43600 to the suction port of the J 45268-4 flush adapter.
11. Flush the front A/C system. Follow the instructions supplied with the J 43600.
Close the valve on the external refrigerant tank, before starting the flush process.
IMPORTANT: Flush the front A/C system before flushing the auxiliary A/C system.
12. If the vehicle is equipped with rear A/C, flush the auxiliary A/C system separately.
12.1. Remove the J 45268-107 from the auxiliary evaporator core.
12.2. Remove the J 45268-103 from the front evaporator core.
12.3. Install the J 45268-103 to the auxiliary evaporator core.
12.4. Install the J 45268-107 to the front evaporator core.
13. Flush the auxiliary A/C system. Follow the instructions supplied with the J 43600.
14. Remove the J 45268-5 from the discharge hose.
15. Remove the J 45268-4 from the suction hose.
16. Drain the PAG oil from the A/C compressor, through the suction and discharge ports. Rotate the compressor input shaft to assist in draining the PAG oil from the A/C compressor.
17. Install the A/C compressor.
18. Remove the J 45268-103.
19. Inspect the TXV for debris.
Clean or replace as needed.
20. Install the auxiliary TXV.
21. Remove the J 45268-107.
22. Inspect the TXV for debris.
Clean or replace as needed.
23. Install the TXV.
24. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging.
IMPORTANT: Flushing will remove all of the PAG oil from the A/C system.
25. Add the total system capacity of PAG oil to the A/C system. Refer to Refrigerant System Capacities.
IMPORTANT: Flushing will remove the fluorescent leak detection dye from the A/C system.
26. Add one bottle of J 41447 using the J 41459.
27. Leak test the fittings using the J 42220.