Removal and Installation
HEATER & COOLING UNIT ASSEMBLYRemoval and Installation
REMOVAL
1. Use a refrigerant collecting equipment (for HFC-134a) to discharge refrigerant.
2. Drain coolant from cooling system.
3. Remove cowl top cover.
4. Disconnect low-pressure flexible hose and high-pressure pipe 1 from evaporator.
a. Set a disconnector (High-pressure side: 92530-89908, Low-pressure side: 92530-89916) on A/C piping.
b. Slide a disconnector toward vehicle front until it clicks.
c. Slide A/C piping toward vehicle front and disconnect it.
CAUTION: Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.
5. Remove air hose and electronic control throttle assembly.
6. Disconnect two heater hoses from heater core.
7. Remove instrument panel & pad.
8. Remove blower unit.
9. Remove clips of vehicle harness from steering member.
10. Remove mounting nuts and bolts, and then remove instrument stays.
11. Disconnect drain hose.
12. Remove mounting bolts from heater & cooling unit.
13. Remove side defroster nozzles.
14. Remove steering member, and then remove heater & cooling unit.
INSTALLATION
Installation is basically the reverse order of removal.
CAUTION:
- Replace O-rings for A/C piping with new ones, and then apply compressor oil to it when installing it.
- Connection point for female-side piping is thin. So, when inserting male-side piping, take care not to deform female-side piping. Slowly insert in axial direction.
- Insert one-touch joint connection point securely until it clicks.
- After piping has been connected, pull male-side piping by hand to make sure piping does not come off.
- When recharging refrigerant, check for leaks.
NOTE:
- When filling radiator with coolant, refer to "Changing Engine Coolant" (VQ35DE) or "Changing Engine Coolant".
- Recharge the refrigerant.
Heater & cooling unit mounting bolt
Tightening torque: 6.9 N.m (0.7 kg-m, 61 in-lb)
Instrument stay mounting nut and bolt
Tightening torque: 12 N.m (1.25 kg-m, 9 ft-lb)