CAUTION:
Replace the O-rings and pipe clamps with new parts, and attach securely.
1. Install in the reverse order of removal.
2. Fill engine coolant. 
3. Charge refrigerant.
HVAC SYSTEM (HEATER, VENTILATOR AND A/C) > Heater Core
CAUTION:
Replace the O-rings and pipe clamps with new parts, and attach securely.
1. Install in the reverse order of removal.
2. Fill engine coolant.
3. Charge refrigerant.