what is the procedure in removing the evaporater coil

you mean the heater core for the heater. HEATER CORE REPLACEMENT REMOVE OR DISCONNECT Coolant from the radiator. Heater case lower cover plate (18). Remove the seven screws that hold the lower cover plate. Heater core hoses. NOTICE: The heater core can be damaged it too much force is applied to the heater core pipes during hose removal. Heater core from the heater case. Remove the screws and bracket that hold the core to the case. INSTALL OR CONNECT Heater core. Install the three screws and bracket. Heater case lower cover plate (18). Install the seven screws. Heater core hoses. Coolant to the radiator. Operate the engine and pressure test for leaks.