4.
Remove the bolts(A) and the expansion valve(B) from the evaporator core.
Plug or cap the lines immediately after disconnecting them to avoid moisture and dust contamination.
Recover the refrigerant with a recovery/recycling/charging station (see page HA-23).
When the engine is cool, drain the engine coolant from the radiator.
Disconnect the negative cable from the battery.
Remove the bolts(A) and the expansion valve(B) from the evaporator core.
Plug or cap the lines immediately after disconnecting them to avoid moisture and dust contamination.
Disconnect the inlet(C) and outlet(D) heater hoses from the heater unit.
Engine coolant will run out when the hoses are disconnected ; drain it into a clean drip pan. Be sure not to let coolant spill on electrical parts or painted surfaces. If any coolant spills, rinse it off immediately.
Remove the crash pad (see BD group - crash pad).
Remove the cross member.
Remove the mounting nut(A), the mounting bolts(B) and heater & evaporator unit(C).
Remove the connector(A). (Only PTC heater type)
Remove the self-tapping screws(B) and the PTC unit(C) or cover.
Remove the side bracket(D).
Remove the clip and lower cover.
Be careful not to bend the inlet and outlet pipes during heater core and evaporator core removal.
Install the heater core and evaporator core in the reverse order of removal.
Install in the reverse order of removal, and note these items :
If you're installing a new evaporator, add refrigerant oil.
Replace the O-rings with new ones at each fitting, and apply a thin coat of refrigerant oil before installing them. Be sure to use the right O-rings for R-134a to avoid leakage.
Immediately after using the oil, replace the cap on the container, and seal it to avoid moisture absorption.
Do not spill the refrigerant oil on the vehicle ; it may damage the paint ; if the refrigerant oil contacts the paint, wash it off immediately.
Apply sealant to the grommets.
Make sure that there is no air leakage.
Charge the system (see page HA-24), and test its performance (see page HA-22).
Do not interchange the inlet and outlet heater hoses and install the hose clamps securely.
Refill the cooling system with engine coolant.
