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
.
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
1. Install both GE 45268-9 fitting O-ring onto GE 45268-10 adapter .
2. Install GE 45268-8 fitting O-ring onto suction side of GE 45268-10 adapter .
3. Install GE 45268-7 fitting O-ring onto discharge side of GE 45268-10 adapter .
Reverse Flushing Setup
Note:
• Reverse flow refrigerant flush is recommended for desiccant bag failure. Replace condenser/receiver dehydrator
assembly when A/C flush is complete and perform the following procedure:
• Inspect and lubricate GE 45268 adapter kit fitting O-rings. Refer to
Air Conditioning O-Ring Seal Replacement
1. Install both GE 45268-9 fitting O-ring onto GE 45268-10 adapter .
2. Install GE 45268-8 fitting O-ring onto suction side of GE 45268-10 adapter .
3. Install GE 45268-7 fitting O-ring onto discharge side of 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
.
2. Remove the thermal expansion valve (TXV). Refer to
Air Conditioning Evaporator Thermal Expansion Valve Replacement
.
3. Install the TXV stud onto GE 45268-115 adapter .
4. Install new sealing washers onto evaporator core. Refer to
Air Conditioning O-Ring Seal Replacement
.
5. Install GE 45268-115 adapter in place of the TXV.
Caution:
Refer to
Fastener Caution
.
6. Install the TXV mounting bolts and tighten to 7
N·m (62
lb
in).
7. Install new washers onto liquid line and suction hose. Refer to
Air Conditioning O-Ring Seal Replacement
.
8. Connect liquid line and suction hose to GE 45268-115 adapter .
HEATING VENTILATION AND AIR CONDITIONING
11
Hvac
BACK TO CHAPTER INDEX
TO MODEL INDEX
CHEVROLET SONIC 2012 BODY REPAIR MANUAL
