Question about 1983 Cadillac Eldorado

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How to replace heater coil 1983cadillac el dorado

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  • Mario Estrada Oct 07, 2010

    I dont have the factory manual but i can get one. I have looked for it in the auto part stores but i havent seen one yet.

  • Mario Estrada Oct 08, 2010

    ok thanks for the link. So did i just paid $18 to get a link were the manual is sold or am i going to get some instruction or prints?



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  • Cadillac Master
  • 80,531 Answers

Due to the complex nature of this job and the age of the car i will need time to try and find the reference material on this, i assume u have a factory service manual, without one this job is not for the home mechanic, way to difficult.

Posted on Oct 07, 2010

  • yadayada
    yadayada Oct 08, 2010

    The web link below will take u to a site that sells the original GM/Cadillac factory repair/service manual for this car, very few people outside of we professional technicians know about OEM used factory manuals, with this manual you will have step by step instructions on how to replace the heater core, all u will need are basic hand tools, but a really good set that has both3/8" drive and 1/4" drive sockets and extensions. TYhe manual at the site below is just $39.00, it will be the best $39.00 you ever spent, trust me on this!

  • yadayada
    yadayada Oct 08, 2010

    Heater Core Replacement


    1. Plug heater core outlets to prevent spillage when removing heater core.
    2. Remove instrument panel sound absorbers, then lower steering column.
    3. Remove instrument cluster trim panel and instrument cluster as described under Instrument Cluster, Replace.
    4. Remove radio front speakers.
    5. Remove screws attaching manifold to heater case.
    6. Remove instrument panel upper and lower attaching screws, then disconnect parking brake release cable.
    7. Disconnect instrument panel wiring harness from dash wiring assembly.
    8. Disconnect righthand remote control mirror cable from instrument panel pad.
    9. Disconnect speedometer cable from clip and temperature control cable from heater case.
    10. Disconnect radio and A/C wiring, vacuum lines and all necessary wiring to remove instrument panel. If equipped with pulse wipers, remove wiper switch, and then disconnect wire connector from instrument cluster carrier and separate pulse wiper jumper harness from wiper switch wire connector.
    11. Remove instrument panel and wiring harness assembly.
    12. Remove four screws retaining defroster nozzle to cowl and one screw at heater case, then remove defroster nozzle.
    13. Disconnect vacuum hoses to programmer and vacuum actuators.
    14. Disconnect wire connector from programmer.

    1. From engine side of dash, remove four nuts retaining heater case to cowl,
    2. From passenger compartment side of dash, remove one screw retaining heater case to cowl, and remove heater case.
    3. Remove four screws securing heater core to case and remove heater core.
    4. Reverse procedure to install.



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