Toyota 87107-07020 Unit Sub-Assy, Heater Radiator

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To remove the heater core, start by disconnecting the negative cable from the battery and draining the cooling system. Then, in the engine compartment, disconnect the heater hoses where they enter the firewall below the heater valve. Next, pull back the carpeting from the driver's side of the console area and remove the two clips and heater protector plate. Finally, remove the three screws and clamps and disconnect the heater pipes. To install the new heater core, pull it out of the heater/air conditioning unit and use new O-rings to seal the heater core pipes. Then, refill the cooling system, reconnect the battery, and run the engine, checking for leaks and proper system operation.

Remove the retaining clips securing the heater core to the housing and slide the heater core and tubes out to the left.