Having problems with your Kia Sorento LX ?

I am trying to change my heater core on my 2004 Kia Sorento. I can't seem to get to it without tearing apart my whole dash in the vehicle. I need step by step instructions so I know the easiest way to get to the heater core and how to put everything back in it's place once I am done.

Posted / edited by AnonymousUser on : 01-03-2021

Answers :

Hi there,
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\015\012\015\012\015\012\015\012\015\0121.\015\012\015\012Disconnect the negative (-) battery terminal.\015\012\015\012\015\012\015\0122.\015\012\015\012Recover the refrigerant with a recovery/ recycling/ charging station.\015\012\015\012\015\012\015\0123.\015\012\015\012When the engine is cool, drain the engine coolant from the radiator.\015\012\015\012\015\012\015\0124.\015\012\015\012Remove the bolts (A) and the expansion valve (B) from the evaporator core.\015\012Plug or cap the lines immediately after disconnecting them to avoid moisture and dust contamination.
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\015\012\015\012\015\012\015\012\015\0125.\015\012\015\012Disconnect the inlet (C) and outlet (D) heater hoses from the heater unit.
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\015\012Engine 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.\015\012 \015\012 \015\012\015\012\015\012\015\012\015\0126.\015\012\015\012Remove the crash pad (Refer to BD group-crash pad).\015\012\015\012\015\012\015\012\015\0127.\015\012\015\012Remove the cowl cross bar assembly. (Refer to BD group-crash pad)\015\012\015\012\015\012\015\012\015\0128.\015\012\015\012Disconnect the connectors from the temperature control actuator, the mode control actuator and the evaporator temperature sensor.\015\012\015\012\015\012\015\012\015\0129.\015\012\015\012Remove the heater blower unit after loosening 7 mounting nuts.\015\012\015\01244128c4.jpg\015\012\015\012\015\012\015\012\015\012\015\01210.\015\012\015\012Remove the heater core (B) after remove the cover (A).\015\012485d970.jpg\015\012\015\012\015\012\015\012\015\012\015\01211.\015\012\015\012Installation is the reverse order of removal, and note these items :\015\012\015\012\015\012\015\012A.\015\012\015\012If you're installing a new evaporator, add refrigerant oil (ND-OIL8).\015\012\015\012\015\012\015\012B.\015\012\015\012Replace 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.\015\012\015\012\015\012\015\012C.\015\012\015\012Immediately after using the oil, replace the cap on the container, and seal it to avoid moisture absorption.\015\012\015\012\015\012\015\012D.\015\012\015\012Do not spill the refrigerant oil on the vehicle ; it may damage the paint ; if the refrigerant oil contacts the paint, wash it off immediately\015\012\015\012\015\012\015\012E.\015\012\015\012Apply sealant to the grommets.\015\012\015\012\015\012\015\012F.\015\012\015\012Make sure that there is no air leakage.\015\012\015\012\015\012\015\012G.\015\012\015\012Charge the system and test its performance.\015\012\015\012\015\012\015\012H.\015\012\015\012Do not interchange the inlet and outlet heater hoses and install the hose clamps securely.\015\012\015\012\015\012\015\012I.\015\012\015\012Refill the cooling system with engine coolant.\015\012\015\012I hope that will help.\015\012\015\012Regards,\015\012Jeep Brainy
To get to the heater core on a Kia Sorrento you need to take apart the dash completely. Once in there you will find the heater core, that looks like a small radiator.
You will have to hose clips using a long nosed tool, and to remove few screws to get the heater core out.

I do not have step by step instructions on how to remove the dash trims, but you will find pictures and diagrams on the repair manual. It is available online registering here.

Here te part: Kia Sorento Heater Core - Partstrain.com
Repair Help & Product Troubleshooting for Kia Sorento LX

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