Heater Unit/Core Replacement
  1. Remove the self-tapping screws and the passenger's heater duct (A). Remove the self-tapping screws and the joint duct (B). Remove the self-tapping screw and the heater core cover (C). Remove the self-tapping screws, the heater pipe bracket (D), and the grommet (E), and carefully pull out the heater core (F).
  1. Install the heater core, and the evaporator core in the reverse order of removal.
  1. Install the heater unit in the reverse order of removal, and note these items:
    • Do not interchange the inlet and outlet heater hoses, and install the hose clamps securely.
    • Refill the cooling system with engine coolant, R20A3 engine model, K24Z3 engine model.
    • Make sure that there is no coolant leakage.
    • Make sure that there is no air leakage.
  1. Do the battery terminal reconnection procedure.