For 1990-2009 cars

#### Tools Required

• | J 43600 ACR 2000 Air Conditioning Service Center

• | J 45268 A/C Flushing Adapter Kit

• | J 41447 Leak Detection Dye

• | J 42220 R-134A A/C Tracer Dye - Box of 24

Important: Flushing with the J 43600 is not intended to remove metal from the A/C system.

Flushing is intended to remove the following contaminants:

• | Contaminated polyalkylene glycol (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 front thermal expansion valve (TXV). Refer to Thermal Expansion Valve Replacement .
3. Install the J 45268-121 in place of the TXV.
4. Remove the A/C compressor. Refer to Air Conditioning Compressor Replacement .
5. Install J 45268-5 to the discharge hose.
6. Install J 45268-4 to the suction hose.
7. Forward flow refrigerant flushing is recommended for contaminated refrigerant or PAG oil.

Perform the following procedure:

| Important: The filter inside J 45268-1 is serviceable. Remove and discard the check valve from the filter.

7.1. | Service the filter with ACDelco P/N GF 470 before each flush.

7.2. | Connect J 45268-1 to the suction port of J 45268-4.

7.3. | Connect the blue hose from J 43600 to J 45268-1 flush filter adapter.

7.4. | Connect the red hose from J 43600 to J 45268-5 flush adapter.

8. Reverse flow refrigerant flushing is recommended for desiccant failure. Replace the desiccant when the A/C flush is complete and perform the following procedure:

| Important: The filter inside J 45268-1 is serviceable.

8.1. | Service the filter with ACDelco P/N GF 470 before each flush.

8.2. | Connect J 45268-1 to the discharge port of J 45268-5.

8.3. | Connect the blue hose from J 43600 to J 45268-1 flush filter adapter.

8.4. | Connect the red hose from J 43600 to the suction port of J 45268-4 flush adapter.

Important: Close the valve on the external refrigerant tank before starting the flush process.

9. Flush the front A/C system. Follow the instructions supplied with the J 43600 .

Important: Flush the front A/C system before flushing the auxiliary A/C system.

10. If the vehicle is equipped with rear A/C, flush the auxiliary A/C system separately.

10.1. | Remove J 45268-121 from the front evaporator.

10.2. | Inspect the front TXV for debris. Clean or replace as needed.

10.3. | Install the front TXV. Refer to Thermal Expansion Valve Replacement.

10.4. | Install J 45268-121 in place of the auxiliary TXV.

11. Flush the auxiliary A/C system. Follow the instructions supplied with J 43600 .
12. Remove J 45268-5 from the discharge hose.
13. Remove J 45268-4 from the suction hose.

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

14. If the removed A/C compressor is being reinstalled, perform the following procedure:

14.1. | Drain the PAG oil from the A/C compressor.

Rotate the compressor input shaft to assist in draining the PAG oil from the compressor.

14.2. | Add the total system capacity of PAG oil to the A/C compressor. Refer to Refrigerant System Capacities .

15. If you will replace the A/C compressor after flushing the system, perform the following procedure:

15.1. | A new service compressor is shipped with PAG oil. Refer to the Refrigerant System Capacities .

15.2. | If the service compressor is shipped with PAG oil, DO NOT drain the new PAG oil from the compressor.

15.3. | Deduct the amount of PAG oil shipped with the service compressor from the amount of PAG oil listed in the capacities table. Refer to Refrigerant System Capacities .

Add the calculated amount to the compressor, as needed.

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

16. Add one bottle of J 41447 directly to the A/C compressor.
17. Install the A/C compressor. Refer to Air Conditioning Compressor Replacement .
18. Remove J 45268-121.
19. Inspect the auxiliary TXV for debris. Clean or replace as needed.
20. Install the auxiliary TXV. Refer to Auxiliary Air Conditioning Evaporator Thermal Expansion Valve Replacement .
21. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
22. Leak test the fittings using J 42220 .