Heating, Ventilation, and Air Conditioning: Maintenance Chevrolet HHR I

Flushing

Tools Required

1. J 41447 R-134a - Leak Detection Dye. See «Special Tools»(ref-299578-S09989474222008092400000) .
2. J 42220 Universal 12V Leak Detection Lamp
3. J 43600 ACR 2000 Air Conditioning Service Center. See «Special Tools»(ref-299578-S09989474222008092400000) .
4. J 45268 A/C Flush Adapter Kit. See «Special Tools»(ref-299578-S09989474222008092400000) .

Flushing is intended to remove the following

1. Contaminated polyalkylene glycol (PAG) oil
2. Desiccant, following a desiccant bag failure
3. Overcharge of PAG oil
4. Refrigerant contamination

Forward Flushing Setup

1. Install both J 45268-9 (2) onto the J 45268-10 (3).
2. Install the J 45268-7 (4) onto the suction side of the J 45268-10 (3).
3. Install the J 45268-8 (1) onto the discharge side of the J 45268-10 (3).

Reverse Flushing Setup

1. Install both J 45268-9 (2) onto the J 45268-10 (3).
2. Install the J 45268-8 (1) onto the suction side of the J 45268-10 (3).
3. Install the J 45268-7 (4) onto the discharge side of the J 45268-10 (3).

Scheme 34

1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging (Non HP2)»(ref-299578-S10466864352008092400000) .
2. Remove the thermal expansion valve (TXV). Refer to «Thermal Expansion Valve Replacement»(ref-299578-S14473536522008092400000) .
3. Install the stud onto the J 45268-115.
4. Install new sealing washers onto the evaporator core. Refer to «Sealing Washer Replacement»(ref-299578-S24625138742008092400000) .
5. Install J 45268-115 in place of the TXV. NOTE: Refer to «Fastener Notice»(ref-299560-S03040597622008092400000) .
6. Install TXV mounting bolts. Tighten: Tighten the bolts to 7 N.m (62 lb in).
7. Install new washers onto the condenser tube and evaporator hose. Refer to «Sealing Washer Replacement»(ref-299578-S24625138742008092400000) .
8. Connect the condenser tube and evaporator hose to the J 45268-115.
9. Install the TXV block fitting nut. Tighten: Tighten the nut to 20 N.m (15 lb ft).
10. Remove the A/C compressor. Refer to «Air Conditioning Compressor Replacement (LE5, L61)»(ref-299578-S01164969312008092400000) or «Air Conditioning Compressor Replacement (LNF)»(ref-299578-S16020568292008092400000) .
11. Remove the A/C refrigerant filter. Refer to «Air Conditioning Evaporator Thermal Expansion Valve Screen Replacement»(ref-299578-S17572075772008092400000) .
12. Service the filter with AC Delco P/N GF 470, before each flush.
13. Install the J 45268-10 to the compressor hose assembly.
14. Connect the J 45268-1 flush filter to the J 45268-7 flush adapter.
15. Connect the blue hose from the J 43600 to J 45268-1 flush filter adapter. See «Special Tools»(ref-299578-S09989474222008092400000) .
16. Connect the red hose from the J 43600 to J 45268-8 flush adapter. See «Special Tools»(ref-299578-S09989474222008092400000) .
17. Flush the A/C system. Follow the instructions supplied with the J 43600 . See «Special Tools»(ref-299578-S09989474222008092400000) .
18. Disconnect the red hose from the J 43600 to J 45268-8 flush adapter. See «Special Tools»(ref-299578-S09989474222008092400000) .
19. Disconnect the blue hose from the J 43600 to J 45268-1 flush filter adapter. See «Special Tools»(ref-299578-S09989474222008092400000) .
20. Disconnect the J 45268-1 flush filter from the J 45268-10 flush adapter.
21. Remove the J 45268-10 from the compressor hose assembly.
22. If you will reinstall the removed A/C compressor, perform the following procedure: Remove the A/C compressor drain plug. Drain the PAG oil from the A/C compressor. Rotate the compressor input shaft to assist in draining the PAG oil from the compressor. Add the total system capacity of PAG oil to the crankcase of the A/C compressor. Refer to «Refrigerant System Capacities»(ref-299578-S03490866282008092400000) . IMPORTANT: Flushing will remove the fluorescent leak detection dye from the A/C system. Add one bottle of J 41447 directly into the A/C compressor. See «Special Tools»(ref-299578-S09989474222008092400000) . Install the A/C compressor drain plug. Tighten: Tighten the drain plug to 15 N.m (11 lb ft).
23. Install the A/C compressor. Refer to «Air Conditioning Compressor Replacement (LE5, L61)»(ref-299578-S01164969312008092400000) or «Air Conditioning Compressor Replacement (LNF)»(ref-299578-S16020568292008092400000) .
24. Install the A/C refrigerant filter. Refer to «Air Conditioning Evaporator Thermal Expansion Valve Screen Replacement»(ref-299578-S17572075772008092400000) .
25. Remove the TXV block fitting nut.
26. Disconnect the condenser tube and evaporator hose from the J45268-115.
27. Remove the TXV bolts retaining the J 45268-115.
28. Remove the J 45268-115.
29. Inspect the TXV for debris. Clean or replace as needed.
30. Install the TXV. Refer to «Thermal Expansion Valve Replacement»(ref-299578-S14473536522008092400000) .
31. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging (Non HP2)»(ref-299578-S10466864352008092400000) .
32. Leak test the fittings using J 42220 .

Draining Procedure

1. Remove the compressor crankcase oil drain plug and drain the crankcase into a clean, graduated container.
2. Drain the oil from both the suction and discharge ports of the removed compressor into the same container. Rotate the compressor shaft to assist in draining the compressor.
3. Measure and record the amount of oil drained from the removed compressor. This measurement will be used during installation of the replacement compressor.
4. Properly discard the used refrigerant oil.